Powder Cores

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Powder Cores
■ Molypermalloy
■ High Flux
■ Kool Mµ
®
Since 1949, MAGNETICS, a division
of Spang & Company, has been a
leading world supplier of
precision, high quality,
magnetic components and
materials to the electronics
industry. Applications for
these products range from
simple chokes and
transformers used in
telephone equipment
to sophisticated
devices for aerospace
electronics. Staffed
with a high degree
of technical talent
coupled with modern
research facilities,
MAGNETICS has
followed a carefully charted
course to find and fill specialized
industrial needs while pioneering new
designs, product developments, and
innovations in manufacturing
methods. Many of these developments
have resulted in acceptance of
MAGNETICS products as industry
standards in tape wound cores,
powder cores, and ferrite cores.
LITERATURE AVAILABLE AT
www.mag-inc.com
PRODUCT LITERATURE AND
DESIGN SOFTWARE CD
CONTAINS
● All Product Literature
● Common Mode FIlter Design Software
● Current Transformer Design Software
● Inductor Design Software
● Mag Amp Design Software
®
POWDER CORE LITERATURE
● MPP-Q1
● MPP-T1
● KMC-S1
● KMC-E1
● CG-03
Q-Curves for MPP Cores
MPP THINZ Technical Bulletin
Kool Mu Application Notes
Kool Mu E Core Technical Bulletin
Cores For Flybacks
CONTENTS
FERRITE LITERATURE
● FC-601
● FC-S1
● FC-S2
● FC-S3
● FC-S4
● FC-S5
● FC-S7
● FC-S8
● CG-01
Design Manual
Ferrite Material Selection Guide
EMI/RFI Common Mode Filters
Q Curves for Ferrite Cores
Step Gap E-cores, Swinging
Chokes
Common Mode Inductors for EMI
Curve Fit Equations for
Ferrite Materials
Designing with Planar
Ferrite Cores
A Critical Comparison of Ferrites
with other Magnetic Materials
SECTION 1
GENERAL INFORMATION
SECTION 2
CORE SELECTION
SECTION 3
TECHNICAL DATA
SECTION 4
CORE DATA
TAPE WOUND CORE LITERATURE
● TWC-500
● TWC-S1
● TWC-S2
● TWC-S3
● SR-4
● SR-6
Design Manual
Fundamentals of Tape
Wound Core Design
How to Select the Proper Core for
Saturating Transformers
Inverter Transformer Core Design
and Material Selection
Mag Amp Control in SMPS
Reduction of Control-loop
Interactions in Mag Amps
CUT CORE LITERATURE
● MCC-100T Design Manual
BOBBIN CORE LITERATURE
● BCC-1.1
Design manual
GENERAL INFORMATION
● APB-2
● CG-04
● CG-02
● CG-05
● CG-06
● TID-100
● SR-1A
● PS-01
● PS-02
● HED-01
● RC-1
● MPB-1
● SSM-6
● SSM-7
● SSM-8
● SSM-9
● SSM-10
All Products Bulletin
Testing Magnetic Cores
Material Selection Charts for
Frequency, Temperature,
Geometry, Stability
Frequently Asked Questions
About MAGNETICS Materials
Designing With Magnetic Cores
at High Temperature
Power Transformer and
Inductor Design
Inductor Design in
Switching Regulators
Cores for SMPS
Magnetic Cores for Switching
Power Supplies
Cores for Hall Effect Devices
Cores for Ground Fault
Interrupters
Spang Metals All Product Bulletin
Permalloy 80
MuMetal
Alloy 48
Magnetic Shielding Materials
Magnesil-N “Thin Gauge”
Non-Oriented Silicon Steel
SECTION 5
1-1 Introduction
1-2 Applications
1-3 Core Identification
1-4 General Powder Core Information
2-1 Core Selection Procedure
2-2 Core Selection Example
2-2 Temperature Rise Calculations
2-3 Core Selector Charts
3-1 Material Properties
3-2 Conversion Tables
3-3 Normal Magnetization Curves
3-5 Core Loss Density Curves
3-12 Permeability versus Temperature Curves
3-15 Permeability versus DC Bias Curves
3-17 Permeability versus AC Flux Curves
3-19 Permeability versus Frequency Curves
3-21 Wire Table
4-1 Toroid Data
4-31 Kool Mµ® E Core Data
4-33 MPP THINZTM Data
HARDWARE
5-1 Toroid Mounts
5-5 Kool Mµ® E Core Hardware
www.mag-inc.com
©2002 Magnetics
All Rights Reserved
Printed in USA
MPP Core Locator & Unit Pack Quantity
P/N
PAGE
55014-A2
55015-A2
55016-A2
55017-A2
55018-A2
55019-A2
55020-A2
55021-A2
55022-A2
55023-A2
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55027-A2
55028-A2
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55052-A2
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55059-A2
55071-A2
55076-A2
55082-A2
55083-A2
55084-A2
55086-A2
55087-A2
55088-A2
55089-A2
55090-A2
55091-A2
55092-A2
55103-A2
55104-A2
55106-A2
55107-A2
55108-A2
55109-A2
55110-A2
55111-A2
55112-A2
55114-A2
55115-A2
55116-A2
55117-A2
55118-A2
4-4
4-4
4-4
4-4
4-4
4-4
4-4
4-4
4-4
4-4
4-8
4-8
4-8
4-8
4-8
4-8
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4-8
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4-8
4-11
4-11
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4-13
4-13
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4-17
4-20
4-22
4-25
4-23
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4-25
4-25
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4-25
4-25
4-28
4-28
4-28
4-28
4-28
4-56
4-28
4-28
4-28
4-14
4-14
4-14
4-14
4-14
A
QTY
2500
2500
2500
2500
2500
2500
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2500
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300
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120
120
120
120
120
120
120
120
100
100
100
100
100
100
100
100
100
2500
2500
2500
2500
2500
P/N
55119-A2
55120-A2
55121-A2
55122-A2
55123-A2
55124-A2
55125-A2
55127-A2
55128-A2
55129-A2
55130-A2
55131-A2
55132-A2
55133-A2
55134-A2
55135-A2
55137-A2
55138-A2
55139-A2
55140-A2
55144-A2
55145-A2
55147-A2
55148-A2
55149-A2
55150-A2
55174-A2
55175-A2
55177-A2
55178-A2
55179-A2
55180-A2
55181-A2
55190-A2
55191-A2
55192-A2
55195-A2
55196-A2
55197-A2
55198-A2
55199-A2
55200-A2
55201-A2
55202-A2
55203-A2
55204-A2
55205-A2
55206-A2
55208-A2
55209-A2
55234-A2
55235-A2
55236-A2
55237-A2
55238-A2
55239-A2
55240-A2
55241-A2
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55248-A2
55249-A2
55250-A2
55251-A2
55252-A2
55253-A2
55254-A2
PAGE
4-14
4-14
4-14
4-14
4-14
4-12
4-12
4-12
4-12
4-12
4-12
4-12
4-12
4-12
4-1
4-1
4-1
4-1
4-1
4-1
4-2
4-2
4-2
4-2
4-2
4-2
4-3
4-3
4-3
4-3
4-3
4-3
4-3
4-27
4-27
4-27
4-27
4-27
4-27
4-27
4-27
4-16
4-16
4-16
4-16
4-16
4-16
4-16
4-16
4-16
4-5
4-5
4-5
4-5
4-5
4-5
4-5
4-5
4-5
4-5
4-23
4-23
4-23
4-23
4-23
4-23
4-23
QTY
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
1550
1550
550
1550
1550
760
760
760
760
760
760
600
600
600
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600
600
100
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1000
1000
1000
1000
2500
2500
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2500
2500
2500
2500
2500
2500
200
200
200
200
200
200
200
P/N
PAGE
55256-A2
55257-A2
55264-A2
55265-A2
55266-A2
55267-A2
55268-A2
55269-A2
55270-A2
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55304-A2
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55344-A2
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55351-A2
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55353-A2
55374-A2
55375-A2
55377-A2
55378-A2
55379-A2
55380-A2
55381-A2
55382-A2
4-23
4-23
4-6
4-6
4-6
4-6
4-6
4-6
4-6
4-6
4-6
4-6
4-9
4-9
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4-9
4-9
4-9
4-10
4-10
4-10
4-10
4-10
4-10
4-10
4-10
4-10
4-10
4-17
4-17
4-17
4-17
4-17
4-17
4-17
4-17
4-17
4-22
4-22
4-22
4-22
4-22
4-22
4-22
4-22
4-22
4-18
4-18
4-18
4-18
4-18
4-18
4-18
4-18
4-18
4-15
4-15
4-15
4-15
4-15
4-15
4-15
4-15
QTY
200
200
2500
2500
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P/N
PAGE
QTY
55383-A2
55404-A2
55405-A2
55407-A2
55408-A2
55409-A2
55410-A2
55411-A2
55412-A2
55413-A2
55432-A2
55433-A2
55435-A2
55436-A2
55437-A2
55438-A2
55439-A2
55440-A2
55441-A2
55542-A2
55543-A2
55544-A2
55545-A2
55546-A2
55547-A2
55548-A2
55550-A2
55551-A2
55579-A2
55580-A2
55581-A2
55582-A2
55583-A2
55584-A2
55585-A2
55586-A2
55587-A2
55588-A2
55709-A2
55710-A2
55712-A2
55713-A2
55714-A2
55715-A2
55716-A2
55717-A2
55718-A2
55848-A2
55866-A2
55867-A2
55868-A2
55869-A2
55894-A2
55906-A2
55907-A2
55908-A2
55909-A2
55924-A2
55925-A2
55926-A2
55927-A2
55928-A2
55929-A2
55930-A2
55932-A2
55933-A2
4-15
4-7
4-7
4-7
4-7
4-7
4-7
4-7
4-7
4-7
4-24
4-24
4-24
4-24
4-24
4-24
4-24
4-24
4-24
4-20
4-20
4-20
4-20
4-20
4-20
4-20
4-20
4-20
4-21
4-21
4-21
4-21
4-21
4-21
4-21
4-21
4-21
4-21
4-26
4-26
4-26
4-26
4-26
4-26
4-26
4-26
4-26
4-16
4-29
4-29
4-29
4-29
4-19
4-30
4-30
4-30
4-30
4-19
4-19
4-19
4-19
4-19
4-19
4-19
4-19
4-19
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
120
120
120
120
120
120
120
120
120
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
100
100
100
100
100
100
100
100
100
1000
27
27
27
27
500
27
27
27
27
500
500
500
500
500
500
500
500
500
www.mag-inc.com
PAGE
58018-A2
58019-A2
58020-A2
58021-A2
58022-A2
58023-A2
58028-A2
58029-A2
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58031-A2
58032-A2
58033-A2
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58039-A2
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58059-A2
58071-A2
58076-A2
58083-A2
58089-A2
58090-A2
58091-A2
58092-A2
58109-A2
58110-A2
58111-A2
58112-A2
58118-A2
58119-A2
58120-A2
58121-A2
58122-A2
58123-A2
58128-A2
58129-A2
58130-A2
58131-A2
58132-A2
58133-A2
58190-A2
58191-A2
4-4
4-4
4-4
4-4
4-4
4-4
4-8
4-8
4-8
4-8
4-8
4-8
4-11
4-11
4-11
4-11
4-11
4-11
4-13
4-13
4-13
4-13
4-13
4-13
4-17
4-20
4-22
4-23
4-25
4-25
4-25
4-25
4-28
4-28
4-28
4-28
4-14
4-14
4-14
4-14
4-14
4-14
4-12
4-12
4-12
4-12
4-12
4-12
4-27
4-27
QTY
2500
2500
2500
2500
2500
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2500
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2500
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120
120
120
100
100
100
100
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
100
100
P/N
58192-A2
58195-A2
58204-A2
58205-A2
58206-A2
58208-A2
58209-A2
58238-A2
58239-A2
58240-A2
58241-A2
58242-A2
58243-A2
58252-A2
58253-A2
58254-A2
58256-A2
58257-A2
58268-A2
58269-A2
58270-A2
58271-A2
58272-A2
58273-A2
58278-A2
58279-A2
58280-A2
58281-A2
58282-A2
58283-A2
58288-A2
58289-A2
58290-A2
58291-A2
58292-A2
58293-A2
58308-A2
58309-A2
58310-A2
58312-A2
58313-A2
58322-A2
58323-A2
58324-A2
58326-A2
58327-A2
58348-A2
58349-A2
58350-A2
58351-A2
www.mag-inc.com
PAGE
4-27
4-27
4-16
4-16
4-16
4-16
4-16
4-5
4-5
4-5
4-5
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4-5
4-23
4-23
4-23
4-23
4-23
4-6
4-6
4-6
4-6
4-6
4-6
4-9
4-9
4-9
4-9
4-9
4-9
4-10
4-10
4-10
4-10
4-10
4-10
4-17
4-17
4-17
4-17
4-17
4-22
4-22
4-22
4-22
4-22
4-18
4-18
4-18
4-18
QTY
100
100
1000
1000
1000
1000
1000
2500
2500
2500
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200
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100
300
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500
500
500
P/N
PAGE
QTY
58352-A2
58353-A2
58378-A2
58379-A2
58380-A2
58381-A2
58382-A2
58383-A2
58408-A2
58409-A2
58410-A2
58411-A2
58412-A2
58413-A2
58438-A2
58439-A2
58440-A2
58441-A2
58546-A2
58547-A2
58548-A2
58550-A2
58551-A2
58583-A2
58584-A2
58585-A2
58586-A2
58587-A2
58588-A2
58715-A2
58716-A2
58717-A2
58718-A2
58848-A2
58866-A2
58867-A2
58868-A2
58869-A2
58894-A2
58906-A2
58907-A2
58908-A2
58909-A2
58928-A2
58929-A2
58930-A2
58932-A2
58933-A2
4-18
4-18
4-15
4-15
4-15
4-15
4-15
4-15
4-7
4-7
4-7
4-7
4-7
4-7
4-24
4-24
4-24
4-24
4-20
4-20
4-20
4-20
4-20
4-21
4-21
4-21
4-21
4-21
4-21
4-26
4-26
4-26
4-26
4-16
4-29
4-29
4-29
4-29
4-19
4-30
4-30
4-30
4-30
4-19
4-19
4-19
4-19
4-19
500
500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
120
120
120
120
300
300
300
300
300
300
300
300
300
300
300
100
100
100
100
1000
27
27
27
27
300
27
27
27
27
500
500
500
500
500
B
Hardware
P/N
General Information
High Flux Core Locator & Unit Pack Quantity
Kool Mµ® Core Locator & Unit Pack Quantity
P/N
77020-A7
77021-A7
77030-A7
77031-A7
77040-A7
77041-A7
77050-A7
77051-A7
77054-A7
77055-A7
77059-A7
77071-A7
77076-A7
77083-A7
77089-A7
77090-A7
77091-A7
77093-A7
77094-A7
77109-A7
77110-A7
77111-A7
77120-A7
77121-A7
77130-A7
77131-A7
77140-AY
77141-AY
77150-AY
77151-AY
77154-AY
77155-AY
77180-AY
77181-AY
77184-AY
77185-AY
77191-A7
77192-A7
77193-A7
77194-A7
77195-A7
77206-A7
C
PAGE
QTY
4-4
4-4
4-8
4-8
4-11
4-11
4-13
4-13
4-13
4-13
4-17
4-20
4-22
4-23
4-25
4-25
4-25
4-25
4-25
4-28
4-28
4-28
4-14
4-14
4-12
4-12
4-1
4-1
4-2
4-2
4-2
4-2
4-3
4-3
4-3
4-3
4-27
4-27
4-27
4-27
4-27
4-16
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
1000
300
300
200
120
120
120
120
120
100
100
100
2500
2500
2500
2500
1550
1550
750
750
750
750
600
600
600
600
100
100
100
100
100
1000
P/N
77210-A7
77211-A7
77213-A7
77214-A7
77224-A7
77225-A7
77240-A7
77241-A7
77244-A7
77245-A7
77254-A7
77256-A7
77258-A7
77259-A7
77270-A7
77271-A7
77280-A7
77281-A7
77290-A7
77291-A7
77294-A7
77295-A7
77310-A7
77312-A7
77314-A7
77315-A7
77324-A7
77326-A7
77328-A7
77329-A7
77334-A7
77335-A7
77350-A7
77351-A7
77352-A7
77354-A7
77355-A7
77380-A7
77381-A7
77384-A7
77385-A7
77410-A7
PAGE
QTY
P/N
PAGE
4-16
4-16
4-28
4-28
4-14
4-14
4-5
4-5
4-5
4-5
4-23
4-23
4-23
4-23
4-6
4-6
4-9
4-9
4-10
4-10
4-10
4-10
4-17
4-17
4-17
4-17
4-22
4-22
4-22
4-22
4-12
4-12
4-18
4-18
4-18
4-18
4-18
4-15
4-15
4-15
4-15
4-7
1000
1000
100
100
2500
2500
2500
2500
2500
2500
200
200
200
200
2500
2500
2500
2500
2500
2500
2500
2500
1000
1000
1000
1000
300
300
300
300
2500
2500
500
500
500
500
500
2500
2500
2500
2500
2500
77411-A7
77414-A7
77415-A7
77438-A7
77439-A7
77440-A7
77442-A7
77443-A7
77444-AY
77445-AY
77548-A7
77550-A7
77552-A7
77553-A7
77585-A7
77586-A7
77587-A7
77589-A7
77590-A7
77715-A7
77716-A7
77717-A7
77719-A7
77720-A7
77824-A7
77825-A7
77834-A7
77835-A7
77844-A7
77845-A7
77848-A7
77868-A7
77874-A7
77875-A7
77884-A7
77885-A7
77894-A7
77908-A7
77930-A7
77932-A7
77934-A7
77935-A7
4-7
4-7
4-7
4-24
4-24
4-24
4-24
4-24
4-16
4-16
4-20
4-20
4-20
4-20
4-21
4-21
4-21
4-21
4-21
4-26
4-26
4-26
4-26
4-26
4-4
4-4
4-8
4-8
4-11
4-11
4-16
4-29
4-6
4-6
4-6
4-6
4-19
4-30
4-19
4-19
4-19
4-19
www.mag-inc.com
QTY
2500
2500
2500
120
120
120
120
120
1550
1550
300
300
300
300
300
300
300
300
300
100
100
100
100
100
2500
2500
2500
2500
2500
2500
1000
27
2500
2500
2500
2500
500
27
500
500
500
500
General Information
Introduction
MAGNETICS Molypermalloy Powder (MPP)
cores are distributed air gap toroidal cores made
from a 79% nickel, 17% iron, and 4% molybdenum
alloy powder for the lowest core losses of any
powder core material.
MPP cores possess many outstanding magnetic
characteristics, such as high resistivity, low
hysteresis and eddy current losses, excellent
inductance stability after high DC magnetization
or under high DC bias conditions and minimal
inductance shift up to 2000 gausses under AC
conditions.
MAGNETICS High Flux powder cores are
distributed air gap toroidal cores made from a
50% nickel - 50% iron alloy powder for the highest
available biasing capability of any powder core
material.
High Flux cores have certain advantages that
make them quite useful for applications involving
high power, high dc bias, or high ac bias at high
power frequencies. High Flux cores have a
saturation flux density of 15000 gauss, as
compared to 7500 gauss for standard MPP cores
or 4500 gauss for ferrites. The core loss of High
Flux powder cores is significantly lower than that
of powdered iron cores. It is possible that High
Flux cores will offer a reduction in core size over
powdered iron cores in most applications.
MAGNETICS Kool Mµ® powder cores are
distributed air gap cores made from a ferrous alloy
powder for low losses at elevated frequencies.
The near zero magnetostriction alloy makes Kool
Mµ ideal for eliminating audible frequency noise
in filter inductors.
www.mag-inc.com
MPP THINZTM, or Molypermalloy Powder washer
cores, are distributed air gapped toroidal cores
made from a 79% nickel, 17% iron, and 4%
molybdenum alloy powder having the highest
permeability of any powder core material and
significantly higher saturation flux density
compared to discrete gapped ferrite. THINZTM offer
an extremely low height self shielded power
inductor core allowing finished inductor heights in
the 1.5 mm to 2 mm range. Excellent temperature
stability, superior inductance under DC bias, and
low core losses highlight this product line’s
outstanding magnetic properties.
1-1
Hardware
In high frequency applications, core losses of
powdered iron, for instance, can be a major factor
in contributing to undesirable temperature rises.
Hence, Kool Mµ cores are ideal because their
losses are significantly less, resulting in lower
temperature rises. It is possible that Kool Mµ cores
will offer a reduction in core size over powdered
iron cores in a similar application.
Kool Mµ E Cores have a distributed air gap
which makes them ideally suited for switching
regulator inductors, flyback transformers, and
power factor correction (PFC) inductors. The 10,500
gauss saturation level of Kool Mµ provides a higher
energy storage capability than can be obtained
with gapped ferrite E cores, resulting in smaller
core size. Kool Mµ E cores are competitively priced
against gapped ferrite E cores and their distributed
air gap eliminates gap loss problems associated
with ferrites. Kool Mµ E cores have significantly
lower losses and substantially better thermal
properties when compared to powdered iron
E cores.
Applications
MAGNETICS powder cores are primarily used
in power inductor applications, specifically in
switch-mode power supply (SMPS) output filters,
also known as DC Inductors. Other power
applications include differential inductors, boost
inductors, buck inductors, and flyback transformers.
since it has the lowest core loss. For the smallest
core size in a dc bias dominated design, High Flux
material should be used since it has the highest flux
capacity. For reasonably low losses and reasonably
high saturation at a low cost, Kool Mµ® should be
used since it has the lowest material costs.
While all three materials are used in these
applications, each has it’s own advantage. For the
lowest loss inductor, MPP material should be used
Other specialty applications, such as High Q low
level filters, load coils, and temperature stabilized
inductors, MPP material is used.
MPP
High Flux
Kool Mµ
Core Loss
Lowest
Moderate
Low
Perm vs. DC Bias
Better
Best
Good
Flux Density (Gauss)
7,500
15,000
10,500
Nickel Content
80%
50%
0%
Relative Cost
High
Medium
Low
1-2
www.mag-inc.com
MAGNETICS powder cores are marked with a part number which identifies its properties and core finish.
The cores are also stamped with a date code, ensuring traceability of core history and performance
characteristics. Cores smaller than 0.250” OD are not stamped. Cores with an OD between .250” and .310”
are stamped with the catalog number (three digits).
General Information
Core Identification
TOROIDS
55 206- A2
Core finish: A7 = Coating
A2 = Coating
A5 = Coating
A9 = Coating
AY = Parylene-C
D4 = Coating
L6 = Coating
M4 = Coating
W4 = Coating
@ 500
@ 500
@ 1000
@ 4000
@ 300
@ 500
@ 500
@ 500
@ 500
vbd for Kool Mµ
vbd for MPP and High Flux
vbd for MPP and High Flux
vbd for MPP and High Flux
vbd for MPP, High Flux and Kool Mµ
vbd, Temperature Stabilized for MPP
vbd, Linear Stabilized for MPP
vbd, Temperature Stabilized for MPP
vbd, Temperature Stabilized for MPP
Catalog number ( designates size and permeability )
Material Code
55 = MPP
58 = High Flux
77 = Kool Mµ
E CORES
K- 5528-E060
Permeability Code . . . . . .First digit is always E
. . . . . . . . . . . . . . . . . . . . .Last three digits equal permeability, e.g. E060 for 60µ
.....................
Size Code . . . . . . . . . . . . .First two digits equal approximate length in mm
. . . . . . . . . . . . . . . . . . . . .Last two digits equal approximate height in mm
Material Code . . . . . . . . . .K = Kool Mµ
THINZ
M-0301-T125
Permeability Code . . . . . .First digit is always T
. . . . . . . . . . . . . . . . . . . . .Last three digits equal permeability, e.g. T125 for 125µ
Hardware
Size Code . . . . . . . . . . . . .First two digits equal approximate outside diameter in mm
. . . . . . . . . . . . . . . . . . . . .Last two digits equal approximate inside diameter in mm
Material Code . . . . . . . . . .M = MPP
www.mag-inc.com
1-3
Core Inductance Tolerance/Grading
MAGNETICS powder cores cores are precision
manufactured to an inductance tolerance of
±8%*, using standards obtained from Kelsall
Permeameter Cup measurements and a
precision series inductance bridge.
Except where noted on specific part numbers,
MPP and High Flux Cores are graded into 2%
inductance bands as a standard practice at no
additional charge. Grading into 1% bands is
available on certain sizes by special request.
Core grading minimizes winding adjustments,
and thus reduces coil costs. When 1% bands
are required, the wound cores must be
processed for inductance stability (see Page
1-8).
Graded MAGNETICS MPP and High Flux cores
are also available with tolerances less than
the standard ±8%. Please contact the plant
for special pricing.
GRADE
Stamped on
Core OD
INDUCTANCE
% Deviation
from Nominal
TURNS
% Deviation
from Nominal
From
To
From
To
+8
+8
+7
-4.0
-3.5
+6
+7
+5
-3.5
-2.5
+4
+5
+3
-3.5
-1.5
+2
+3
+1
-0.5
+0.5
+0
+1
-1
-0.5
+0.5
-2
-1
-3
+0.5
+1.5
-4
-3
-5
+1.5
+2.5
-6
-5
-7
+2.5
+3.5
-8
-7
-8
+3.5
+4.0
* Kool Mµ cores with outside diameters less than 12mm have wider tolerances.
Core Finish
MAGNETICS powder cores are coated with a special
finish that provides a tough, wax tight, moisture and
chemical resistant barrier having excellent dielectric
properties. Each material has a unique color coating:
MPP – Gray
High Flux – Khaki
Kool Mµ – Black
The finish is tested for voltage breakdown by
inserting the core between two weighted wire mesh
pads. Force is adjusted to produce a uniform pressure
of 10 psi, simulating winding pressure. The test
condition to guarantee the minimum breakdown
voltage (500 volts rms from wire to core) is a 60 Hz voltage equal to 2.5 times the minimum (or 1250 volts rms
wire to wire). Higher minimum voltage breakdown
finishes can be provided upon request.
1-4
Cores as large as 0.650” OD can be coated with
parylene to minimize the constriction of the inside
diameter dimensions. The parylene coating has a
minimum breakdown voltage guarantee of 300 volts
rms from wire to core (tested at 750 volts rms wire to
wire at 60 Hz). All finished dimensions in this catalog
are for the color coating. When choosing a parylene
coated core, the maximum OD and HT are reduced by
0.18 mm (0.007”), and the minimum ID may be
increased by 0.18 mm (0.007”).
The maximum steady-state operating temperature for
the coating is 200°C. The maximum steady-state
operating temperature for the parylene coating is
130°C, but can be used as high as 200°C for short
periods, such as during infrared solder reflow. High
temperature operation of the cores does not affect
the magnetic properties.
www.mag-inc.com
MAGNETICS inductance standards are measured in a Kelsall
Permeameter Cup. Actual wound inductance measured
outside a Kelsall Cup is greater than the calculated value due
to leakage flux and flux developed by the current in the
winding. The difference depends on many variables — core
size, permeability, core finish thickness, wire size, and number
of turns, in addition to the way in which the windings are put
on the core. This difference is negligible for permeabilities
above 125 and turns greater than 500. However, the lower
the permeability and/or number of turns, the more
pronounced this deviation becomes.
The following table is presented as a guide to the
differences that may be experienced with various numbers
of turns on a 1-inch O.D. 125µ core:
Number of Turns
Actual Inductance
1000
+0.0%
500
+0.5%
300
+1.0%
100
+3.0%
50
+5.0%
25
+8.5%
General Information
Inductance versus Turns
The following formula can be used to approximate the leakage flux to add to the expected inductance.
This formula was developed from historical data of cores tested at MAGNETICS. Be aware that this will only
give an approximation based on evenly spaced windings. You may expect as much as a ±50% deviation
from this result.
292 N1.065Ae
LLK =
le X 105
where : LLK
N
Ae
le
=
=
=
=
leakage inductance (mH)
number of turns
core cross-section (cm2)
core magnetic path length (cm)
AL and Inductance Considerations
The inductance of a wound core can be calculated from the core geometry by using the following equation:
.4 πµN2Ae
L=
le X 108
where : L
µ
N
Ae
le
=
=
=
=
=
inductance (Henries)
core permeability
number of turns
core cross section (cm2)
core magnetic path length (cm)
The inductance for a given number of turns is related to the nominal inductance (as listed in the catalog as mH/1000
turns) by the following:
Hardware
L1000N2
Ln = 6
10
where : Ln = inductance for N turns (mH)
L1000 = nominal inductance (mH/1000 turns)
www.mag-inc.com
1-5
Temperature & Linear Stabilization
(Only applies to MPP cores)
MAGNETICS MPP cores are provided in three basic
temperature stabilizations; Standard, Controlled, and
Linear. Typical and guaranteed inductance limits for
these temperature stabilizations are illustrated on the
following pages.
Standard cores are offered with three different finishes
(2, 5, or 9). Controlled and Linear cores are offered with
a 4 and 6 finish, respectively. See page 1-7 for further
finish information.
The inductance of MPP cores is affected by temperature
changes, which cause variations in the amount of
distributed air gap (insulating material). The expansion
characteristics of powdered metal, insulating material,
and core finish all contribute to the inductance change
arising from temperature changes.
The temperature coefficient of inductance can be
controlled by the addition of a small percentage of
special compensating alloys, which have curie points
within the temperature range being controlled. When
each curie point is exceeded, these particles become
non-magnetic and act as additional air gaps; thus
the change in inductance is minimized over a
predetermined temperature range. MPP cores can
thus be utilized in precision circuits requiring extremely
high inductance stability over wide temperature ranges.
MAGNETICS standard cores (-A Stabilization) offer the
expected temperature performance shown on page
1-7. If guaranteed temperature performance is
necessary, Controlled or Linear cores are recommended.
MAGNETICS 550µ cores are available only as standard
cores.
MAGNETICS MPP cores are offered in three controlled
stabilizations, D, W, and M to provide high levels of
inductance stability over temperature per the chart
listed below. Stabilization is effective only to initial
permeability or when cores are driven at low
induction (<100 gauss).
MPP cores are also offered with linear temperature
characteristics, type L6. Linear cores provide a
temperature coefficient, from -55°C to +85°C, which
can be matched with a 100ppm polystyrene capacitor
to yield extremely stable tuned circuits. Temperature
coefficient values are referenced to 25°C.
The temperature stability of MPP cores can be affected
by external factors such as moisture, winding stresses
and potting compounds. These effects can be
minimized by using suitable stability procedures during
the coil fabrication process. Please see inductance
stability considerations on page 1-8.
INDUCTANCE STABILITY LIMITS
Below 100 Gauss
INDUCTANCE STABILITY
TEMPERATURE RANGE
M*
+- 0.25%
-65˚C to +125˚C
W
+- 0.25%
-55˚C to +85˚C
D
+- 0.10%
0˚C to +55˚C
STABILIZATION CODE
* M cores meet the W core limits and may be substituted in place of W.
1-6
www.mag-inc.com
(Only applies to MPP cores)
Part No.
Suffix
Stabilization
Type
Inductance
Stability Limits
Stabilized
Temperature Range
Guaranteed
Minimum Breakdown*
-A2
Standard
See Page 3-12
-
500 volts**
-AY
Standard
See Page 3-12
-
300 volts
-A5
Standard
See Page 3-12
-
1000 volts
-A9
Standard
See Page 3-12
-
4000 volts***
-D4
Controlled
+0.1%
0°C to +55°C
+32°F to 130°F
500 volts
-W4
Controlled
+.25%
-55°C to +85°C
-67°F to +185°F
500 volts
-M4
Controlled
+.25%
-65°C to +125°C
-85°F to +257°F
500 volts
-L6
Linear
See Below
-55°C to +85°C
-67°F to 185°F
500 volts
*From wire to bare core
**except on cores smaller than .200” OD
General Information
Temperature and Linear Stabilization
***Add .015” to OD, HT and subtract .015” from ID to finished core dimensions chart shown on core data pages.
1.015
1.010
3
1.005
1.000
0.995
0
, 18
00µ
0µ
o 20
60 t
Minimum Limit for 60 to 300µ, 25
um
Maxim
0.990
imum
Max
r 60
Limit fo
Limit
f or 3
µ
60 to 300
0
PPM/ C
0
C
M/
PP
0
/
PPM
, 65
C
0
M/ C
, 150 PP
0
PM/ C
µ , 90 P
to 200
0
, 11
00µ
0
/C
PPM
Hardware
Per Unit of Initial Permeability
MPP Linear Cores Guaranteed Limits
0.985
-55
-35
-15
5
25
45
65
85
Temperature, °C
www.mag-inc.com
1-7
Inductor Stabilization Procedure
(Only applies to MPP cores)
MAGNETICS MPP cores possess excellent inductance/
time stability. Under typical shelf life conditions the
inductance of an unpotted core will shift less than 0.5%.
If maximum stability is desired, the following
precautions and procedures will remove winding
stresses and core moisture and provide inductance
stabilities better than 0.05%.
1. Wind cores to the approximate specified
inductance (slightly over the desired value).
2. Cool wound cores to -60°C. Maintain at
temperature for 20 minutes to help relieve winding
stresses caused by high winding tension, large
wire, or many turns.
3. Heat cores slowly (<2°C/minute) to 115°C. Maintain
at temperature for 20 minutes.
4. Steps 2 and 3 should be repeated twice.
5. Bake at 115°C for 16 hours.
6. Cool to room temperature and adjust turns to
obtain specified inductance.
7. Cores must be kept dry until potted or hermetically
sealed.
8. If the cores are to be potted, they should be covered
first with a cushioning material, such as silicone
rubber. This material minimizes the possibility of
the potting compound stressing the core and
changing the inductance value.
9. Potting compounds should be chosen with care, as
even semi-flexible resins can cause core stresses and
reduce stability. Selection should be based on
minimum shrinkage and minimum moisture
absorption.
Winding Considerations
Winding Factors
Wound Coil Dimensions
MAGNETICS core winding factors can vary from 20% to
60%, a typical value in many applications being 40%.
Wound coil dimensions are listed for unity winding
factor, as these are the largest dimensions necessary
for packaging the wound coil. These dimensions are
attainable, as a 70% winding factor (no residual hole)
yields the same overall coil dimensions as a 100%
(unity) winding factor (no interstices).
Coil dimensions for coils wound to 40% winding factor
can be estimated as follows:
MAGNETICS has chosen to normalize winding data by
basing Rdc, ohm/mh, and winding-turn-length on unity
winding factor. This approach provides the coil
designer with a means of calculating realistic design
parameters for his choice of winding factor.
Please note that unity values are theoretical values,
not attainable in practice. The highest winding factor
possible, even with hand winding, is 65% - 75%, due
to the spacing between the turns of wire.
Winding Turn Length
Winding turn lengths have been computed, using
empirical relationships, for five winding factors. This
permits an estimate of the actual length/turn for any
winding factor.
1-8
OD40% = .5 (ODcore + ODunity)
where : ODcore = core OD after finish
ODunity = wound coil OD
Hgt40%= .45 (Hgtcore + Hgtunity)
where : Hgtcore = core OD after finish
Hgtunity = wound coil OD
www.mag-inc.com
Nominal DC Resistance, in ohms/millihenry (listed on core size pages), is useful in calculating DC winding resistance (Rdc)
for any value of inductance. The value of nominal DC Resistance is essentially independent of wire size and the number
of turns of wire. The value of Nominal DC Resistance for any given winding factor can be computed as follows:
Ωmhu X Kwf
Ω/mhwf =
wf
Ku
where : Ω/mhwf
Ω/mhu
wf
Kwf
Ku
=
=
=
=
=
General Information
Nominal DC Resistance
Ω/mh for chosen winding factor
unity value, listed for each core size
chosen winding factor
length/turn for chosen wf*
length/turn for unity (100%) wf*
*see “Winding Turn Length” on core size pages
The value of Rdc for any given winding factor can be computed as follows:
Rdcwf
dcwf = Rdcu
dcu X wf X
Kwf
Ku
where : Rdcwf
Rdcu
wf
Kwf
Ku
=
=
=
=
=
Rdc for chosen winding factor
unity value, listed for each size (ohms)
chosen winding factor
length/turn for chosen wf*
length/turn for unity (100%) wf*
Sample Calculation
Using a 55930 core, we can calculate the value of Rdc for 50 mh and 40% winding factors as follows, using parameter
values listed on page 4-19:
Ω/mh40% =
Ω/mhu
K
.0524
.1344
X 40% =
X
= .103Ω/mh
wf
Ku
.40
.1714
The value of ohms/mh yields a value of Rdc at 50 mh, of 5.1 ohms (50mh x .103)
The value Rdc for the 55930 core can also be obtained by noting the unity values for No. 28 wire (i.e. 1400 turns and
15.67 ohms) can be converted to 40% winding factor values as follows:
N40% = Nunity X wf
= 560 turns
www.mag-inc.com
Hardware
= 1400 X .40
K40%
Rdc40% = Rdcu X wf X
Ku
.1344
= 15.67 X .40 X
.1714
= 4.9 ohms
1-9
Core Selector Charts
The core selector charts will quickly yield optimum
permeability and smallest core size for dc bias
applications. These charts are based on a permeability
reduction of not more than 50% with dc bias, typical
winding factors of 25% to 40%, and an ac current,
which is small relative to the dc current. These charts
are based on the minimum inductance tolerance of the
chosen core size and permeability.
If a core is being chosen for use with a large ac current
relative to any dc current, such as a flyback inductor or
buck/boost inductor, select a core that is one or two
sizes larger than indicated by the selector charts. This
will assist in reducing the operating flux density of the
ac current that generates core loss.
For additional power handling capability, LI2,
multiple stacking of cores will yield an equivalent
multiple power handling for a given core size. For
example, double stacking of the 55908-A2 core will
result in a doubling of its power handling capability to
about 1000 mH-amperes2.
Core Selection Procedure
Only two parameters of the design application must be
known: inductance required with dc bias and the dc
current. Use the following procedure to determine the
core size and number of turns.
1. Compute the product of LI2 where:
L = inductance required with dc bias (millihenrys)
I = dc current (amperes)
2. Locate the LI2 value on the Core Selector Chart
(page 2-3 & 2-4). Follow this coordinate to the
intersection with the first core size that lies above
the diagonal permeability line. (Small core sizes are
at the bottom; large core sizes are at the top.) This
is the smallest core size that can be used.
3. The permeability line is sectioned into standard
available core permeabilities. Selecting the permeaability indicated will yield the smallest core that can
be used. Lower or higher permeabilities can be
used, but the resulting core size will be larger.
4. Inductance, core size, and permeability are now
known. Calculate the number of turns by using the
following procedure:
(a) The nominal inductance (AL in mH / 1000 turns)
for the core is obtained from the core data sheet.
Determine the minimum nominal inductance by
using the worst case negative tolerance
2-1
(-8%, -12%, or -15%, depending on the core
size). With this information, calculate the number
of turns needed to obtain the required
inductance (see AL and Inductance
Considerations, page 1-5).
(b) Calculate the bias in oersteds from:
H = 0.4π NI/le
(c) From the Permeability vs. DC Bias curves
(page 3-15, 3-16, 4-33, & 4-35), determine the
rolloff in per unit of initial permeability (µpu)
for the previously calculated bias level.
(d) Increase the number of turns by dividing the
initial number of turns (from step 4a) by the per
unit value of initial permeability. This will yield
an inductance close to the required value. A
final adjustment of turns may be necessary if a
specific inductance is required.
5. Choose the correct wire size using the Wire Table
(page 3-21). Duty cycles below 100% allow smaller
wire sizes and lower winding factors, but do not
allow smaller core sizes.
6. The core chosen will have an inductance equal to
or greater than that required when biased with the
specified dc current. The resulting winding factor
will be between 25% and 45%.
www.mag-inc.com
Core Selection Example and Analysis
An analysis of the preceding result yields the following:
1. Calculate the dc bias level in oersteds:
H = 0.4πNI/le = 104.9 oersteds
1. The product of LI2 = 1.0 X 3.02 = 9.00
2. The permeability versus DC Bias curve shows a
48% initial permeability at 104.9 oersteds for
60µ material.
2. This coordinate passes through the 60µ section of
the permeability line and, proceeding upwards,
intersects the horizontal 55586 core line. The part
number for a 60µ core of this size is 55586-A2.
3. The 55586 core data sheet shows the nominal
inductance of this core to be 38 mH / 1000 turns,
±8%. Therefore, the minimum inductance of this
core is 34.96 mH / 1000 turns.
4. The number of turns needed to obtain 1.0 mH is
169.1 turns. The magnetizing force (dc bias) is
71.2 oersteds, yielding 68% of initial permeability.
The adjusted turns are 249.
3. Multiply the minimum AL 34.96 mH by 0.48 yields
16.78 mH.4.
4. The inductance of this core with 249 turns and with
104.9 oersteds of dc bias will be 1.04 mH.
The minimum inductance requirement of 1.0 mH has
been achieved with the dc bias.
Core Selection
Choose a core with the following requirements:
(a) minimum inductance with dc bias of 1.0 mH
(b) dc current of 3.0 amperes
5. 249 turns of #20 wire (0.00634 cm2) equals
1.579 cm2, which is 39% winding factor on this core
(total window area of 4.01 cm2).
5. The wire table indicates that #20 wire is needed for
3.0 amperes. Therefore, a 55586-A2 core with 249
turns of #20 wire will meet the requirements.
Temperature Rise Calculations
[
The heat dissipated depends on the total exposed surface of the wound unit. Temperature rise cannot be predicted precisely, but can be approximated by the following formula:
Total Power Loss (milliwatts)
Temperature Rise (°C) =
Surface Area (cm2)
[
Temperature rise in a wound core depends on (1) wire
resistance and current through the coil (Pcu, copper
losses), and (2) core excitation (Pfe, core losses). Total
power loss, defined as Pfe + Pcu (milliwatts), is in the
form of heat and is dissipated from exposed surfaces of
a wound core.
.833
www.mag-inc.com
Hardware
In this catalog, surface area is presented in two ways:
1. Unwound core (after insulation is added)
2. Wound core, assuming 40% winding factor
2-2
Cores Listed by Geometry Factor
MPP Core Selector Chart
55908
26µ
55868
55440
55091
55083
55191
55111
55716
60µ
55071
55586
55076
55894
125µ
55310
55350
160µ
55378
55204
55118
200µ
300µ
55045
55035
55275
55265
55125
55285
55405
55025
55235
55015
55175
55145
55135
0.0001
0.001
0.01
0.1
1
2
10
100
1000
2
LI , mH-amperes
High Flux Core Selector Chart
Cores Listed by Geometry Factor
58908
26µ
58192
58110
58716
60µ
58324
58439
58090
58083
58548
58930
58585
125µ
58350
58310
147µ
58205
58379
58119
160µ
58048
58128
58288
58038
58408
58028
58278
58268
58018
58238
0.001
0.01
0.1
1
2
10
LI , mH-amperes
2-3
58868
100
2
www.mag-inc.com
1000
77908
77868
77439
77090
77083
26µ
60µ
75µ
77071
77590
77191
77110
77716
77076
77935
90µ
Core Selection
Cores Listed by Geometry Factor
Kool Mµ® Core Selector Chart
77354
77314
77206
77120
77380
125µ
77050
77040
77280
77270
77130
77290
77410
77030
77240
77020
77180
77150
77140
0.0001
0.001
0.01
0.1
1
2
10
100
2
LI , mH-amperes
26
u
40
u
1
K5530
K5528
K4022
K4020
K4317
60
u
K3515
0
K2510
Hardware
90
u
Cores Listed by Geometry Factor
Kool Mµ® E Core Selector Chart
0
0.1
K1808
1
10
2
100
2
LI , mH-amperes
www.mag-inc.com
2-4
Material Properties
PERMEABILITY VS. T, B, & F – TYPICAL
Permeability (µ)
µ vs. T dynamic range
(-50˚ C to +100˚C)
Painted cores usuable to 200˚C
µ vs. B dynamic range
50 to 4000gauss
(peak at 1000 gauss)
µ vs. F.
flat to...
14µ
0.6%
+0.4%
9 MHz
26µ
0.6%
+0.4%
5 MHz
60µ
0.6%
+0.8%
2.7 MHz
125µ
0.6%
+1.4%
1 MHz
147µ
0.6%
+1.9%
700 kHz
160µ
0.6%
+1.9%
700 kHz
173µ
0.6%
+1.9%
700 kHz
200µ
0.6%
+2.5%
500 kHz
300µ
0.6%
+4.0%
150 kHz
550µ
7.0%
+20.0%
90 kHz
14µ
0.8%
+5.0%
8 MHz
26µ
1.0%
+9.0%
2.5 MHz
60µ
1.4%
+13.5%
1.2 MHz
125µ
1.8%
+19.0%
600 kHz
147µ
2.5%
+22.5%
400 kHz
160µ
2.8%
+25.5%
350 kHz
26µ
4.0%
+1.0%
20 MHz
60µ
8.0%
+1.5%
8 MHz
75µ
10.0%
+2.0%
3 MHz
90µ
12.0%
+3.0%
2 MHz
125µ
15.0%
+3.5%
1 MHz
MPP Cores
High Flux Cores
Kool Mµ Cores
Material porperties above only apply to toroids, not THINZ or E cores.
3-1
Curie
Temperature
Density
Temperature
Coefficient of
Thermal Expansion
Thermal
Conductivity
MPP Cores
High Flux Cores
Kool Mµ Cores
460˚C
500˚C
500˚C
8.7 grams/cm3
8.2 grams/cm3
7.0 grams/cm3
12.9 x 10-6/˚C
5.8 x 10-6/˚C
10.8 x 10-6/˚C
0.8 Watts/(cm x 0K)
0.8 Watts/(cm x 0K)
0.8 Watts/(cm x 0K)
www.mag-inc.com
Conversion Tables
Multiply
Multiply number of
by
to obtain number of
oersteds
gauss
in2
circular mils
watts / lb.
watts / lb.
watts / lb.
.795
.0001
6.425
5.07 x 10-6
19.17
18.07
15.42
amp-turns / cm
tesla
cm2
cm2
mWatts / cm3
mWatts / cm3
mWatts / cm3
MPP, High Flux, Kool Mµ
MPP, High Flux, Kool Mµ
MPP, High Flux, Kool Mµ
MPP, High Flux, Kool Mµ
MPP
High Flux
Kool Mu
Core weights listed in this catalog are for 125µ cores. To determine weights for other permeabilities, multiply the 125µ
weight by the following factors:
14µ
26µ
60µ
75µ
90µ
125µ
x Factor
0.80
0.86
0.94
0.96
0.97
1.00
1.02
www.mag-inc.com
200µ
300µ
550µ
1.03
1.04
3-2
Technical Data
Permeability
147µ
160µ
173µ
Normal Magnetization Curves, MPP
7
5µ
12
µ
60
26
µ
3
14
7µ
4
17
3µ
30
0
µ
5
16
0µ
55
0µ
6
20
0µ
Flux Density (Kilogauss)
8
2
µ
14
1
0
1
10
100
1000
Magnetizing Force (Oersteds)
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0µ
16
7µ
14
5µ
12
60
µ
Flux Density (Kilogauss)
Normal Magnetization Curves, High Flux
µ
26
µ
14
1
10
100
Magnetizing Force (Oersteds)
3-3
www.mag-inc.com
1000
Normal Magnetization Curves, Kool Mµ®
10
5µ
12
µ
90
9
8
60 75
µ µ
Flux Density (kilogauss)
11
7
6
5
4
µ
26
3
2
1
0
10
1
100
1000
Technical Data
Magnetizing Force (oersteds)
Normal Magnetization Curve Fit Formula
(refer to curves for units)
a
[
a + bH + cH2
B = a + dH + eH2
where:
]
x
-23.740
0.2112
0.2576
0.0642
0.0653
0.0447
0.0545
0.1001
0.0940
0.0730
b
c
d
e
x
1.654E1
2.780E-2
5.900E-2
-4.990E-2
-5.810E-2
-4.440E-2
-6.140E-2
-1.154E-1
-1.228E-1
-1.201E-1
9.249E-1
-2.274E-5
1.208E-4
2.060E-2
2.860E-2
3.300E-2
4.120E-2
5.780E-2
1.260E-1
4.105E-1
6.189E1
8.849E-3
1.970E-2
7.879E-3
1.260E-2
7.975E-3
5.471E-3
4.820E-3
1.910E-2
5.070E-2
3.158E-1
-7.810E-6
4.780E-5
3.398E-4
4.533E-4
5.170E-4
6.450E-4
9.043E-4
1.946E-3
6.290E-3
2
2
2
0.5
0.5
0.5
0.5
0.5
0.5
0.5
MPP
14µ
26µ
60µ
125µ
147µ
160µ
173µ
200µ
300µ
550µ
High
Flux
14µ
26µ
60µ
125µ
147µ
160µ
-1.880E-1
-1.286E-1
-5.360E-1
5.320E-2
7.740E-2
2.670E-2
2.190E-2
4.120E-2
3.058E-1
-5.420E-2
-7.760E-2
-4.230E-2
7.255E-4
7.493E-4
2.430E-2
2.220E-2
2.700E-2
2.980E-2
4.210E-2
4.230E-2
5.521E-4
8.372E-3
1.565E-3
1.763E-3
2.200E-4
2.161E-4
6.434E-3
1.073E-4
1.403E-4
1.556E-4
2
2
2
0.5
0.5
0.5
Kool
Mµ
26µ
60µ
75µ
90µ
125µ
5.868E-3
1.658E-2
1.433E-2
5.660E-2
7.808E-3
7.450E-3
1.831E-3
7.738E-3
-9.675E-3
4.049E-2
5.706E-4
4.621E-3
8.376E-3
1.250E-2
1.643E-2
-2.930E-4
4.700E-3
5.773E-3
5.792E-3
3.121E-3
5.539E-6
3.833E-5
7.159E-5
1.075E-4
1.447E-4
0.5
0.5
0.5
0.5
0.5
www.mag-inc.com
3-4
Core Loss Density Curves, MPP 14µ
µ
y
Typical Core Loss (mw/cm)
10000
1000
30
100
10
Hz
0k
0k
50
10
Hz
z
kH
z
kH
z
kH
10
z
H
5k
z
H
2k
20
1
0.1
PL=2.341B
2.21 1.31
F
0.01
0.01
0.1
1
Flux Density (kilogauss)
Core Loss Density Curves, High Flux 14µ
Typical Core Loss (mw/cm)
1000
0k
10
100
Hz
5
Hz
0k
k
10
z
kH
20
Hz
Hz
5k
Hz
2k
Hz
1k
10
0
10
1
Hz
60
Hz
2.52 1.26
PL=6.370 B
0.1
0.1
1
10
Flux Density (kilogauss)
3-5
F
www.mag-inc.com
Core Loss Density Curves, MPP 26µ
Typical Core Loss (mw/cm3)
10000
1000
30
100
10
10
Hz
0k
0k
50
Hz
z
kH
z
kH
z
kH
10
Hz
k
5
20
1
0.1
PL=0.999B2.18F1.41
0.01
1
0.1
Technical Data
0.01
Flux Density (kilogauss)
Core Loss Density Curves, High Flux 26µ
Typical Core Loss (mw/cm3)
1000
0
10
100
kH
z
50
z
kH
z
kH 0 kH
1
20
z
Hz
5k
z
Hz
2 k 1 kH
10
0
10
1
Hz
60
Hz
2.55 1.25
PL=5.437 B
0.1
0.1
1
F
10
Flux Density (kilogauss)
www.mag-inc.com
3-6
Core Loss Density Curves, MPP 60µ
Typical Core Loss (mw/cm)
10000
1000
100
30
0k
10
10
0k
50
20
1
Hz
Hz
z
kH
z
kH
z
kH
z
H
5k
10
0.1
2.24 1.41
PL=0.625B
F
0.01
0.01
0.1
1
Flux Density (kilogauss)
Typical Core Loss (mw/cm3)
Core Loss Density Curves, High Flux 60µ
0k
10
1000
Hz
z
kH
20 kHz
0
1
100
2k
10
Hz
k
50
5k
1k
z
0H
10
1
Hz
Hz
Hz
H
60
z
PL=4.578 B
0.1
0.1
1
Flux Density (kilogauss)
3-7
www.mag-inc.com
2.56 1.23
F
10
Core Loss Density Curves, MPP 125µ
Typical Core Loss (mw/cm)
10000
1000
100
k
300
10
Hz
z
kH
100 Hz
k
0
5
z
kH
25
1
z
kH
10
Hz
k
5
0.1
Hz
2k
Hz
1k z
H
0
0
5
0.01
PL=1.199B2.31F1.40
0.001
0.1
1
Technical Data
Flux Density (kilogauss)
Typical Core Loss (mw/cm)
Core Loss Density Curves, High Flux 125µ
1000
0
10
100
z
kH
5
Hz
0k
20
z
kH z
H
Hz
5k
k
10
Hz kHz
2k
1
10
0H
10
1
z
60
Hz
PL=2.687 B
0.1
0.1
1
1
2.59 1.33
F
10
Flux Density (kilogauss)
www.mag-inc.com
3-8
Core Loss Density Curves, MPP 147µ /160µ/173µ
Typical Core Loss (mw/cm)
10000
1000
100
300
kH
z
z
kH
100
z
kH
50
z
H
k
25
10
1
10
kH
z
Hz
5k
Hz
2k
Hz
k
1
Hz
500
0.1
0.01
PL=0.771B2.25F1.50
0.001
1
0.1
Flux Density (kilogauss)
Core Loss Density Curves, High Flux 147µ/160µ
Typical Core Loss (mw/cm)
1000
0
10
100
kH
z
50
kH
z
20
z
z
k H 10 k H
2k
10
Hz
10
1
5k
1k
0H
z
Hz
Hz
60
Hz
PL=3.613 B
0.1
0.1
F
10
1
Flux Density (kilogauss)
3-9
2.56 1.41
www.mag-inc.com
Core Loss Density Curves, MPP 200µ/ 300µ
y
µ
µ
Typical Core Loss (mw/cm³)
10000
1000
3 00
100
kH
z
z
kH
1 00 z
H
k
50
z
kH
25
10
1
10
5
0.1
kH
z
z
kH
Hz
2k
z
H
1k
Hz
0
50
0.01
PL=1.000B
2.27 1.64
F
0.001
1
Technical Data
0.1
Flux Density (kilogauss)
Core Loss Density Curves, MPP 550µ
y
Typical Core Loss (mw/cm³)
10000
1000
3 00
100
kH
10 0
10
50
1
10
25
kH
z
z
z
kH
Hz
Hz
2k
Hz
k
1
Hz
50 0
0.01
z
z
kH
5k
0.1
kH
PL=3.070B2.36F1.59
0.001
0.1
1
Flux Density (kilogauss)
www.mag-inc.com
3-10
Core Loss Density Curves, Kool Mµ®
Typical Loss Density (mw/cm3)
10000
0k
10
1000
100
0k
50
Hz
Hz
k
50
Hz
k
25
Hz
Hz
Hz
0k
0k
0
0
2
3
PL=B2.00F1.46
10
0.1
1
10
Flux Density (kilogauss)
Unlike MPP and High Flux, the typical loss density of Kool Mµ does not vary significantly with permeability;
therefore, only one material curve is shown.
3-11
www.mag-inc.com
1.04
0µ
30
1.03
20 0
1.02
µ
3µ
- 17
160
125µ
147
1.01
60µ
26µ
14µ
1.00
14µ
300µ
0.99
-60
-40
-20
0
20
40
60
80
100
120
140
160
180
200
Temperature, °C
AY coating maximum steady-state operating temperature is 130° C.
Per Unit of Initial Permeability (typical)
Permeability versus Temperature Curves, MPP (A2, AY, A5, A9)
1.15
1.10
0µ
55
1.05
1.00
0.95
-60
-40
-20
0
20
40
60
80
100
120
140
160
180
200
Temperature, °C
AY coating maximum steady-state operating temperature is 130° C.
www.mag-inc.com
3-12
Technical Data
Per Unit of Initial Permeability (typical)
Permeability versus Temperature Curves, MPP (A2, AY, A5, A9)
Per Unit of Initial Permeability (typical)
Permeability versus Temperature Curves, High Flux
1.04
µ
µ
160 147
1.03
µ
125
1.02
60µ
26µ
14µ
1.01
1.00
0.99
0.98
0.97
14µ
26µ
60µ
125µ
µ
147
µ
160
0.96
-55
-35
-15
5
25
45
65
85
105
125
Temperature, °C
Permeability versus Temperature Curve Fit Formula
(refer to curves for units)
%∆µ = a + bT + cT2
where:
3-13
High
Flux
a
b
c
14µ:
0.9975
9.667E-5
5.556E-8
26µ:
0.9967
1.293E-4
3.802E-8
60µ:
0.9956
1.739E-4
4.094E-8
125µ:
0.9940
2.402E-4
3.216E-8
147µ:
0.9921
3.140E-4
7.310E-8
160µ:
0.9908
3.674E-4
1.754E-8
www.mag-inc.com
1.02
1.00
0.98
0.96
0.92
0.90
0.88
60
75µ
90µ
125
µ
µ
60µ
µ
75 90µ
12
5µ
0.94
26µ
26µ
0.86
0.84
-55
-35
-15
5
25
45
65
85
105
125
Technical Data
Per Unit of Initial Permeability (typical)
Permeability versus Temperature Curves, Kool Mµ
Temperature, °C
Permeability versus Temperature Curve Fit Formula
(refer to curves for units)
%∆µ = a + bT + cT2 + dT3 + eT4 Kool
where:
Mµ
a
b
c
d
e
26µ:
-0.3676
3.398E-2
-2.976E-4
-1.803E-6
1.079E-8
60µ:
-1.450
7.691E-2
-6.177E-4
-4.263E-6
3.108E-8
75µ:
-1.578
8.729E-2
-8.392E-4
-4.235E-6
3.749E-8
90µ:
-1.854
1.033E-1
-1.063E-3
-4.720E-6
4.539E-8
125µ:
-2.710
1.408E-1
-1.455E-3
-8.167E-6
7.764E-8
www.mag-inc.com
3-14
Permeability versus DC Bias Curves, MPP
14µ
0.9
26
µ
5µ
12
0.8
147µ
160µ
173µ
0.7
0.6
0µ
20
60µ
0.5
0.4
0µ
30
Per Unit of Initial Permeability
1.0
0.3
0.2
0.1
550
µ
0.0
1
100
10
1000
DC Magnetizing Force (Oersteds)
This curve only applies to MPP toroids. The MPP THINZTM DC Bias curve can be found on page (4-35).
Permeability versus DC Bias Curves, High Flux
14µ
125
µ
0.9
16
0
0.8
µ
14
7µ
26
µ
0.7
µ
60
Per Unit of Initial Permeability
1.0
0.6
0.5
0.4
0.3
0.2
0.1
0.0
1
10
100
DC Magnetizing Force (Oersteds)
3-15
www.mag-inc.com
1000
Permeability versus DC Bias Curves, Kool Mµ®
Per Unit of Initial Permeability
1.0
26µ
0.9
60
µ
0.8
12
5µ 90µ
0.7
75
µ
0.6
0.5
0.4
0.3
0.2
0.1
0.0
1
10
100
1000
Technical Data
DC Magnetizing Force (oersteds)
This curve only applies to Kool Mµ toroids. The Kool Mµ E core DC Bias curve can be found on page (4-33).
Permeability versus DC Bias Curve Fit Formula
(refer to curves for units)
MPP
High Flux
Kool Mµ
www.mag-inc.com
3-16
Per Unit of Initial Permeability
Permeability versus AC Flux Curves, MPP
1.22
1.20
550µ
1.18
1.16
1.14
1.12
1.10
1.08
1.06
300µ
200µ
1.04
1.02
14 7
-1
1.00
14
0.98
10
100
&2
6µ
60
µ
73
µ
12
5µ
1000
AC Flux Density (gauss)
1.26
1.24
1.22
1.20
1.18
1.16
1.14
1.12
1.10
1.08
1.06
1.04
1.02
1.00
0.98
16
0µ
Per Unit of Initial Permeability
Permeability versus AC Flux Curves, High Flux
7µ
14
5µ
12
60
µ
26µ
14µ
10
100
1000
AC Flux Density (gauss)
3-17
www.mag-inc.com
10000
Per Unit of Initial Permeability
Permeability versus AC Flux Curves, Kool Mµ®
1.04
1.03
5µ
12
µ
90
1.02
µ
75
60µ
1.01
26µ
1.00
0.99
100
1000
Technical Data
10
AC Flux Density (gauss)
Permeability versus AC Flux Curve Fit Formula
(refer to curves for units)
a
b
c
d
MPP
14µ:
26µ:
60µ:
125µ:
147µ:
160µ:
173µ:
200µ:
300µ:
550µ:
0.9995
0.9995
0.9990
0.9990
0.9980
0.9980
0.9980
0.9990
0.9980
0.9910
1.186E-5
1.186E-5
1.708E-5
2.960e-5
4.393E-5
4.393E-5
4.393E-5
5.145E-5
9.038E-5
4.042E-4
-5.096E-9
-5.096E-9
-6.675E-9
-1.561E-8
-2.591E-8
-2.591E-8
-2.591E-8
-2.688E-8
-5.112E-8
-2.240E-7
-2.727E-12
-2.727E-12
-1.792E-12
8.254E-13
3.446E-12
3.446E-12
3.446E-12
3.308E-12
7.055E-12
3.123E-11
High
Flux
14µ:
26µ:
60µ:
125µ:
147µ:
160µ:
0.999
0.998
1.000
1.000
1.000
0.998
5.458E-5
1.020E-4
1.476E-4
1.934E-4
2.350E-4
2.910E-4
-1.930E-8
-3.696E-8
-5.695E-8
-6.792E-8
-8.895E-8
-1.224E-7
2.598E-12
5.099E-12
9.395E-12
1.014E-11
1.465E-11
2.263E-11
-1.228E-16
-2.529E-16
-6.182E-16
-6.347E-16
-9.716E-16
-1.590E-15
Kool
Mµ
26µ:
60µ:
75µ:
90µ:
125µ:
-1.291E-3
-1.850E-3
-2.135E-3
-2.769E-3
-2.421E-3
4.711E-5
7.340E-5
9.533E-5
1.430E-4
1.740E-4
-5.779E-8
-9.824E-8
-1.189E-7
-2.092E-7
-2.662E-7
2.102E-11
4.486E-11
4.847E-11
1.115E-10
1.531E-10
-2.121E-15
-7.157E-15
-6.242E-15
-2.135E-14
-3.170E-14
MPP :
µeff = µi = (a + bB + cB2 + dB3 )
where:
High Flux and Kool Mµ:
µeff = µi (a + bB + cB2 + dB3 + eB4)
where:
www.mag-inc.com
e
3-18
Per Unit of Initial Permeability
Permeability versus Frequency Curves, MPP
1.0
0.9
0.8
60
µ
20
0µ
0.7
14
17
0.6
0.5
30
0µ
0.4
55
0.3
14 µ
26 µ
125
µ
7µ
3µ
0µ
0.2
0.1
0.0
0.01
0.1
10
1
Frequency (MHz)
1.0
26µ
0.9
0.8
12
5µ
0.7
0.6
0.5
60
µ
0.4
0.3
0.2
0.1
0.0
0.01
0.1
1
Frequency (MHz)
3-19
14µ
µ
7µ 60
1
14
Per Unit of Initial Permeability
Permeability versus Frequency Curves, High Flux
www.mag-inc.com
10
Per Unit of Initial Permeability
Permeability versus Frequency Curves, Kool Mµ®
1.00
60µ
75µ
0.95
26µ
90
µ
12
5µ
0.90
0.85
0.80
0.75
0.01
0.1
1
10
Technical Data
Frequency (MHz)
Permeability versus Frequency Curve Fit Formula
(refer to curves for units)
a
µeff = µi =
where:
[
a + bf + cf2
a + df + ef2
]
2
b
c
1.793E2
1.823E2
1.805E2
1.818E2
1.816E2
1.816E2
1.816E2
1.809E2
1.786E2
1.773E2
-9.742E-3
-7.285E-3
-1.010E-2
-6.429E-3
7.382E-5
7.382E-5
7.382E-5
-4.943E-3
4.958E-3
2.649E-3
d
MPP
14µ:
26µ:
60µ:
125µ:
147µ:
160µ:
173µ:
200µ:
300µ:
550µ:
-3.288
-7.930
-6.583
-3.676
-10.544
-10.544
-10.544
5.551
19.705
31.318
High
Flux
14µ:
26µ:
60µ:
125µ:
147µ:
160µ:
-3.514
-5.340
-9.438
-22.76
-12.87
-12.87
180.3
183.0
182.6
181.6
180.951
180.951
-0.008689
-0.003220
-4.248E-4
-0.001246
-0.001167
-0.001167
180.0
182.4
181.7
179.5
179.4
179.4
-0.008005
3.455E-4
0.009010
0.01970
0.03110
0.03110
Kool
Mµ
26µ:
60µ:
75µ:
90µ:
125µ:
0.03919
4.182
7.559
12.80
19.18
180.6
180.4
177.4
181.2
179.2
0.01116
0.01099
0.01724
0.008411
0.01379
180.5
180.6
177.9
181.9
180.4
0.01159
0.01183
0.01890
0.01048
0.01677
www.mag-inc.com
1.790E2
1.817E2
1.799E2
1.812E2
1.805E2
1.805E2
1.805E2
1.810E2
1.794E2
1.792E2
e
-9.218E-3
-5.719E-3
-6.944E-3
2.624E-3
1.510E-2
1.510E-2
1.510E-2
1.400E-2
6.160E-2
9.260E-2
3-20
Wire Table
AWG
Wire
Size
Resistance
Wire
Ω/meter
OD (cm)
(x.305=Ω/ft) Heavy Build
Wire Area
Circ.
sq. cm
Mils
(x0.001)
Current Capacity, Amps
(listed by columns of amps/sq.cm.)
200
800
400
600
8
9
10
.00207
.00259
.00328
.334
.298
.267
18,000
14,350
11,500
91.2
72.7
58.2
16.5
13.1
10.4
33.0
26.2
20.8
49.5
39.3
31.2
66.0
52.4
41.6
11
12
13
.00413
.00522
.00656
.238
.213
.1902
9,160
7,310
5,850
46.4
37.0
29.6
8.23
6.53
5.18
16.4
13.1
10.4
24.6
19.6
15.5
32.8
26.1
20.8
14
15
16
.00827
.01043
.01319
.1714
.1529
.1369
4,680
3,760
3,000
23.7
19.1
15.2
4.11
3.26
2.58
8.22
6.52
5.16
12.3
9.78
7.74
16.4
13.0
10.3
17
18
19
.01657
.0210
.0264
.1224
.1095
.0980
2,420
1,940
1,560
12.2
9.83
7.91
2.05
1.62
1.29
4.10
3.25
2.58
6.15
4.88
3.87
8.20
6.50
5.16
20
21
22
.0332
.0420
.0531
.0879
.0785
.0701
1,250
1,000
810
6.34
5.07
4.11
1.02
.812
.640
2.05
1.63
1.28
3.08
2.44
1.92
4.10
3.25
2.56
23
24
25
.0666
.0843
.1063
.0632
.0566
.0505
650
525
425
3.29
2.66
2.15
.511
.404
.320
1.02
.808
.641
1.53
1.21
.962
2.04
1.62
1.28
26
27
28
.1345
.1686
.214
.0452
.0409
.0366
340
270
220
1.72
1.37
1.11
.253
.202
.159
.506
.403
318
.759
.604
.477
1.01
.806
.636
29
30
31
.266
.341
.430
.0330
.0295
.0267
180
144
117
.912
.730
.593
.128
.100
.0792
.255
.200
.158
.382
.300
.237
.510
.400
.316
32
33
34
.531
.676
.856
.0241
.0216
.01905
96.0
77.4
60.8
.487
.392
.308
.0640
.0504
.0397
.128
.101
.0794
.192
.152
.119
.256
.202
.159
35
36
37
1.086
1.362
1.680
.01702
.01524
.01397
49.0
39.7
32.5
.248
.201
.165
.0314
.0250
.0203
.0627
.0500
.0405
.0940
.0750
.0608
.125
.100
.0810
38
39
40
2.13
2.78
3.51
.01245
.01092
.00965
26.0
20.2
16.0
.132
.102
.081
.0160
.0123
.00961
.0320
.0245
.0192
.0480
.0368
.0288
.0640
.0490
.0384
41
42
43
4.33
5.45
7.02
.00864
.00762
.00686
13.0
10.2
8.40
.066
.052
.043
.00785
.00625
.00484
.0157
.0125
.00968
.0236
.0188
.0145
.0314
.0250
.0194
44
45
46
8.50
10.99
13.81
.00635
.00546
.00498
7.30
5.30
4.40
.037
.027
.022
.00400
.00309
.00248
.00800
.00618
.00496
.0120
.00927
.00744
.0160
.0124
.00992
47
48
49
17.36
22.1
27.6
.00452
.00394
.00353
3.60
2.90
2.25
.018
.015
.011
.00194
.00175
.00150
.00388
.00350
.00300
.00582
.00525
.00450
.00776
.00700
.00600
3-21
www.mag-inc.com
0.140”
0.070”
3.56mm
OD
1.78mm ID x 1.52mm HT
0.060”
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
4.19 mm
1.27 mm
2.16 mm
Permeability (µ)
0.165 in
0.050 in
0.085 in
AL +- 8%
MPP
13
16
19
26
31
33
36
42
62
55140-AY
55139-AY
55138-AY
55134-AY
55137-AY
55135-AY
60
75
90
125
147
160
173
200
300
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
0.018 cm2
0.0137 cm2
0.817 cm
0.0112 cm2
0.094 gm
0.069 gm
0.0002 cm4
3,600 c.mils
0.0021 in2
0.317 in
0.00067 in2
0.00019 lb
0.00014 lb
0.000006 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
0.698 cm
0.0229 ft
0.658 cm
0.0216 ft
0.619 cm
0.0203 ft
0.600 cm
0.0197 ft
0.594 cm
0.0195 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
Part Number
Kool Mµ AL+- 15%
4.95 mm
2.74 mm
0.195 in
0.108 in
High Flux
-
77141-AY
77445-AY
77444-AY
77140-AY
-
AWG
Wire Size
Turns
(u.w.f.)
Rdc
(Ohms, Ω)
(u.w.f.)
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
20
25
31
37
46
59
73
91
111
138
178
225
277
353
428
493
679
818
947
1241
0.0373
0.0595
0.093
0.137
0.217
0.353
0.553
0.865
1.3
2.05
3.45
5.51
8.37
13.4
21
29.2
52.1
78.9
114.7
191.8
11
13
14
16
18
21
24
28
31
35
40
46
52
59
66
72
84
92
102
117
0.0174
0.0263
0.0357
0.0506
0.0723
0.107
0.155
0.227
0.31
0.442
0.661
0.96
1.34
1.91
2.76
3.64
4.78
7.55
10.5
15.4
Surface Area
Unwound Core
40% Winding Factor
4-1
0.482 cm2
0.65 cm2
Kool Mµ
0.075 in2
0.101 in2
www.mag-inc.com
0.155”
0.088”
3.94mm
OD
2.24mm ID x 2.54mm HT
0.100”
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
4.57 mm
1.73 mm
3.18 mm
Permeability (µ)
0.180 in
0.068 in
0.125 in
AL +- 8%
MPP
17
21
25
35
41
45
48
56
84
55150-AY
55149-AY
55148-AY
55144-AY
55147-AY
55145-AY
60
75
90
125
147
160
173
200
300
Physical Characteristics
0.0308 cm2
0.0211 cm2
0.942 cm
0.0199 cm3
0.172 gm
0.122 gm
0.0006 cm4
6,080 c.mils
0.00327 in
0.371 in
0.00121 in3
0.00038 lb
0.00027 lb
0.000015 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
1.049 cm
0.0344 ft
0.989 cm
0.0324 ft
0.929 cm
0.0305 ft
0.903 cm
0.0296 ft
0.894 cm
0.0293 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
5.77 mm
4.75 mm
0.227 in
0.187 in
High Flux
Kool Mµ
-
77151-AY
77155-AY
77154-AY
77150-AY
-
AWG
Wire Size
Turns
(u.w.f.)
Rdc
(Ohms, Ω)
(u.w.f.)
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
24
30
37
46
56
69
88
109
134
164
205
264
333
410
522
634
730
1005
1221
1480
0.0544
0.0837
0.1324
0.205
0.309
0.488
0.787
1.229
1.916
2.89
4.57
7.69
12.31
18.61
29.8
46.7
65
115.9
175.4
269
13
15
17
20
22
25
29
33
37
41
46
53
61
68
78
87
94
110
121
134
0.0249
0.0357
0.0518
0.0768
0.104
0.151
0.222
0.32
0.45
0.615
0.873
1.32
1.91
2.63
3.79
5.46
7.13
10.8
14.9
20.8
Surface Area
Unwound Core
40% Winding Factor
0.76 cm2
1.2 cm2
0.118 in2
0.186 in2
www.mag-inc.com
4-2
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
Kool Mµ AL+- 15%
0.183”
0.093”
4.65mm
OD
2.36mm ID x 2.54mm HT
0.100”
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
5.28 mm
1.85 mm
3.18 mm
Permeability (µ)
0.208 in
0.073 in
0.125 in
AL +- 8%
MPP
20
25
30
42
49
53
57
67
99
55181-AY
55180-AY
55179-AY
55178-AY
55174-AY
55177-AY
55175-AY
60
75
90
125
147
160
173
200
300
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
0.029 cm2
0.0285 cm2
1.062 cm
0.0303 cm3
0.25 gm
0.18 gm
0.0008 cm4
5,780 c.mils
0.00442 in2
0.418 in
0.00185 in3
0.00056 lb
0.00041 lb
0.000020 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
1.143 cm
0.0375 ft
1.083 cm
0.0355 ft
1.024 cm
0.0336 ft
0.998 cm
0.0327 ft
0.988 cm
0.0324 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
Part Number
Kool Mµ AL+- 15%
6.65 mm
4.94 mm
0.262 in
0.195 in
High Flux
-
4-3
1.108 cm2
1.50 cm2
77181-AY
77185-AY
77184-AY
77180-AY
-
AWG
Wire Size
Turns
(u.w.f.)
Rdc
(Ohms, Ω)
(u.w.f.)
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
21
26
32
40
49
60
75
95
118
145
178
222
286
361
444
566
688
791
1090
1313
0.0412
0.0643
0.0989
0.156
0.243
0.366
0.577
0.93
1.46
2.26
3.41
5.4
9.08
14.5
22
35.3
55.2
76.8
137
207
11
13
15
17
19
22
24
28
32
36
40
45
52
59
67
76
85
92
107
118
0.0183
0.0275
0.0395
0.0572
0.0807
0.115
0.16
0.237
0.343
0.484
0.664
0.944
1.43
2.05
2.86
4.08
5.9
7.72
11.6
16.1
Surface Area
Unwound Core
40% Winding Factor
Kool Mµ
0.172 in2
0.233 in2
www.mag-inc.com
0.250”
0.110”
6.35mm
OD
2.79mm ID x 2.79mm HT
0.110”
020A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
6.99 mm
2.29 mm
3.43 mm
Permeability (µ)
0.275 in
0.090 in
0.135 in
AL +- 8%
MPP
6
10
24
30
36
50
59
64
69
80
120
220
55023-A2
55022-A2
55021-A2
55020-A2
55019-A2
55018-A2
55014-A2
55017-A2
55015-A2
55016-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
0.0412 cm2
0.0470 cm2
1.361 cm
0.0640 cm3
0.588 gm
0.553 gm
0.393 gm
0.0019 cm4
8,100 c.mils
0.00729 in2
0.536 in
0.00391 in3
0.0013 lb
0.0012 lb
0.0009 lb
0.000046 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
1.348 cm
0.0442 ft
1.273 cm
0.0417 ft
1.200 cm
0.0394 ft
1.168 cm
0.0383 ft
1.156 cm
0.0379 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
8.81 mm
5.38 mm
0.347 in
0.212 in
1.68 cm2
2.2 cm2
0.260 in2
0.341 in2
High Flux
Kool Mµ
58023-A2
58022-A2
58021-A2
58020-A2
58019-A2
58018-A2
-
77021-A7
77825-A7
77824-A7
77020-A7
-
AWG
Wire Size
Turns
(u.w.f.)
Rdc
(Ohms, Ω)
(u.w.f.)
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
24
30
37
45
56
69
84
105
133
165
204
249
312
401
506
623
794
964
1110
1528
0.0432
0.0682
0.1063
0.1635
0.259
0.401
0.604
0.953
1.54
2.42
3.74
5.64
8.92
15.01
24
36.4
58.3
91.2
127
226
12
14
16
18
21
23
26
30
34
38
44
48
54
62
71
80
91
101
110
128
0.0186
0.0273
0.0395
0.0554
0.0828
0.114
0.16
0.235
0.336
0.477
0.691
0.931
1.33
1.99
2.87
4
5.72
8.19
10.8
16.2
Surface Area
Unwound Core
40% Winding Factor
www.mag-inc.com
4-4
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
Kool Mµ AL+- 12%
0.260”
0.105””
6.60mm
OD
2.67mm ID x 2.54mm HT
0.100”
240A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
7.24 mm
2.16 mm
3.18 mm
Permeability (µ)
0.285 in
0.085 in
0.125 in
AL +- 8%
MPP
6
11
26
32
39
54
64
69
75
86
130
242
55243-A2
55242-A2
55241-A2
55240-A2
55239-A2
55238-A2
55234-A2
55237-A2
55235-A2
55236-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
0.0412 cm2
0.0476 cm2
1.363 cm
0.0649 cm3
0.58 gm
0.55 gm
0.399 gm
0.0020 cm4
8,100 c.mils
0.00738 in2
0.537 in
0.00396 in3
0.0013 lb
0.0012 lb
0.00088 lb
0.000047 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
1.327 cm
0.0435 ft
1.251 cm
0.0410 ft
1.176 cm
0.0386 ft
1.144 cm
0.0375 ft
1.132 cm
0.0371 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
Part Number
Kool Mµ AL+- 12%
9.12 mm
5.13 mm
0.359 in
0.202 in
High Flux
Kool Mµ
58243-A2
58242-A2
58241-A2
58240-A2
58239-A2
58238-A2
-
77241-A7
77245-A7
77244-A7
77240-A7
-
AWG
Wire Size
Turns
(u.w.f.)
Rdc
(Ohms, Ω)
(u.w.f.)
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
24
30
37
45
56
69
84
105
133
165
204
249
312
401
506
623
794
964
1110
1528
0.0425
0.0671
0.1046
0.1609
0.255
0.395
0.595
0.938
1.513
2.38
3.68
5.55
8.78
14.8
23.7
35.8
57.3
89.8
125
223
12
14
16
18
21
23
26
30
34
39
44
48
54
62
71
80
91
101
110
128
0.0183
0.0267
0.0388
0.0542
0.81
0.112
0.156
0.229
0.329
0.479
0.677
0.912
1.3
1.95
2.82
3.92
5.6
8.02
10.6
15.9
Surface Area
Unwound Core
40% Winding Factor
4-5
0.264 in2
0.357 in2
1.70 cm2
2.3 cm2
www.mag-inc.com
0.260”
0.105”
6.60mm
OD
2.67mm ID x 4.78mm HT
0.188”
270A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
7.24 mm
2.16 mm
5.54 mm
Permeability (µ)
0.285 in
0.085 in
0.213 in
AL +- 8%
MPP
12
21
50
62
74
103
122
132
144
165
247
466
55273-A2
55272-A2
55271-A2
55270-A2
55269-A2
55268-A2
55264-A2
55267-A2
55265-A2
55266-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
0.0384 cm2
0.0920 cm2
1.363 cm
0.1254 cm3
1.09 gm
1.03 gm
0.771 gm
0.0035 cm4
7,570 c.mils
0.01426 in2
0.537 in
0.00765 in3
0.0024 lb
0.0023 lb
0.0017 lb
0.000085 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
1.754 cm
0.0575 ft
1.701 cm
0.0558 ft
1.650 cm
0.0541 ft
1.628 cm
0.0534 ft
1.620 cm
0.0531 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
9.17 mm
7.42 mm
0.361 in
0.292 in
2.41 cm2
2.9 cm2
0.375 in2
0.450 in2
High Flux
Kool Mµ
58273-A2
58272-A2
58271-A2
58270-A2
58269-A2
58268-A2
-
77271-A7
77875-A7
77874-A7
77270-A7
-
AWG
Wire Size
Turns
(u.w.f.)
Rdc
(Ohms, Ω)
(u.w.f.)
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
22
28
34
42
53
65
79
98
124
154
191
233
291
375
473
582
742
901
1037
1428
0.0525
0.0828
0.1292
0.1988
0.314
0.487
0.734
1.158
1.868
2.94
4.55
6.86
10.85
18.25
29.2
44.2
70.8
110.9
154.4
275
12
13
16
17
20
22
25
28
33
37
42
46
52
60
68
77
87
98
106
123
0.0262
0.0355
0.0555
0.0733
0.11
0.153
0.215
0.307
0.457
0.651
0.925
1.25
1.78
2.69
3.86
5.4
7.67
11.1
14.6
21.9
Surface Area
Unwound Core
40% Winding Factor
www.mag-inc.com
4-6
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
Kool Mµ AL+- 12%
0.270”
0.156”
6.86mm
OD
3.96mm ID x 5.08mm HT
0.200”
410A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
7.49 mm
3.45 mm
5.71 mm
Permeability (µ)
0.295 in
0.136 in
0.225 in
AL +- 8%
MPP
8
14
33
42
50
70
81
89
95
112
166
55413-A2
55412-A2
55411-A2
55410-A2
55409-A2
55408-A2
55404-A2
55407-A2
55405-A2
14
26
60
75
90
125
147
160
173
200
300
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
0.0934 cm2
0.0725 cm2
1.65 cm
0.1196 cm3
1.0 gm
0.94 gm
0.736 gm
0.0067 cm4
18,500 c.mils
0.01124 in2
0.650 in
0.00731in3
0.0022 lb
0.0021 lb
0.0016 lb
0.000161 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
1.786 cm
0.0586 ft
1.698 cm
0.0557 ft
1.612 cm
0.0529 ft
1.579 cm
0.0518 ft
1.561 cm
0.0512 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
Part Number
Kool Mµ AL+- 12%
9.60 mm
10.0 mm
0.378 in
0.394 in
2.7 cm2
3.2 cm2
0.419 in2
0.496 in2
High Flux
Kool Mµ
58413-A2
58412-A2
58411-A2
58410-A2
58409-A2
58408-A2
-
77411-A7
77415-A7
77414-A7
77410-A7
-
AWG
Wire Size
Turns
(u.w.f.)
Rdc
(Ohms, Ω)
(u.w.f.)
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
55
69
85
103
129
159
193
239
305
378
466
570
712
916
1157
1424
1814
2203
2535
3491
0.1321
0.208
0.325
0.49
0.786
1.221
1.832
2.89
4.66
7.33
11.33
17.1
27
45.5
72.5
110.1
176.5
276
385
685
20
23
26
29
33
37
41
46
53
60
67
73
83
95
108
121
138
153
166
195
0.042
0.0605
0.0869
0.121
0.176
0.248
0.34
0.485
0.708
1.02
1.42
1.91
2.75
4.12
5.92
8.18
11.7
16.8
22
33.4
Surface Area
Unwound Core
40% Winding Factor
4-7
www.mag-inc.com
0.310”
0.156”
7.87mm
OD
3.96mm ID x 3.18mm HT
0.125”
5 5030A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
8.51 mm
3.45 mm
3.81 mm
Permeability (µ)
0.335 in
0.136 in
0.150 in
AL +- 8%
MPP
6
11
25
31
37
52
62
66
73
83
124
229
55033-A2
55032-A2
55031-A2
55030-A2
55029-A2
55028-A2
55024-A2
55027-A2
55025-A2
55026-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
0.0922 cm2
0.0615 cm2
1.787 cm
0.1099 cm3
0.92 gm
0.87 gm
0.676 gm
0.0057 cm4
18,200 c.mils
0.00953 in2
0.704 in
0.00671 in3
0.0020 lb
0.0019 lb
0.0015 lb
0.000136 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
1.598 cm
0.0524 ft
1.471 cm
0.0482 ft
1.347 cm
0.0442 ft
1.292 cm
0.0424 ft
1.272 cm
0.0417 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
11.0 mm
6.73 mm
0.433 in
0.265 in
2.38 cm2
3.2 cm2
0.369 in2
0.496 in2
AWG
Wire Size
Turns
(u.w.f.)
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
23
28
35
43
54
68
83
101
127
156
190
235
300
372
459
561
701
902
1139
1402
High Flux
Kool Mµ
58033-A2
58032-A2
58031-A2
58030-A2
58029-A2
58028-A2
-
77031-A7
77835-A7
77834-A7
77030-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.0191
0.0298
0.0467
0.0728
0.1152
0.1818
0.284
0.436
0.69
1.069
1.612
2.54
4.1
6.45
9.98
15.04
23.8
40
64.1
97
Single
Layer
Turns
12
13
15
18
20
23
26
29
33
37
41
46
53
60
67
73
83
95
108
121
Single
Layer Rdc.
(Ohms, Ω)
0.0082
0.0109
0.016
0.0243
0.0342
0.0493
0.0707
0.0982
0.143
0.202
0.277
0.395
0.577
0.828
1.16
1.56
2.24
3.79
4.82
6.65
Surface Area
Unwound Core
40% Winding Factor
www.mag-inc.com
4-8
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
Kool Mµ AL+- 12%
0.380”
0.188”
9.65mm
OD
4.78mm ID x 3.18mm HT
0.125”
55280A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
10.29 mm
4.27 mm
3.81 mm
Permeability (µ)
0.405 in
0.168 in
0.150 in
AL +- 8%
MPP
6
11
25
32
38
53
63
68
74
84
128
232
55283-A2
55282-A2
55281-A2
55280-A2
55279-A2
55278-A2
55274-A2
55277-A2
55275-A2
55276-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
0.1429 cm2
0.0752 cm2
2.18 cm
0.1639 cm3
1.4 gm
1.3 gm
1.008 gm
0.0107 cm4
28,200 c.mils
0.01166 in2
0.858 in
0.0100 in3
0.0030 lb
0.0028 lb
0.00222 lb
0.000258 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
1.793 cm
0.0588 ft
1.627 cm
0.0533 ft
1.465 cm
0.0480 ft
1.393 cm
0.0457 ft
1.366 cm
0.0448 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
Part Number
Kool Mµ AL+- 12%
13.4 mm
7.44 mm
0.526 in
0.293 in
3.12 cm2
4.4 cm2
0.483 in2
0.682 in2
AWG
Wire Size
Turns
(u.w.f.)
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
23
28
35
43
54
66
83
105
128
157
196
241
294
365
464
576
711
868
1086
1397
High Flux
Kool Mµ
58283-A2
58282-A2
58281-A2
58280-A2
58279-A2
58278-A2
-
77281-A7
77885-A7
77884-A7
77280-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.01345
0.0212
0.0332
0.0518
0.0812
0.1265
0.2
0.316
0.493
0.758
1.199
1.858
2.8
4.42
7.12
11.21
17.3
26.1
41.4
69.6
Surface Area
Unwound Core
40% Winding Factor
4-9
www.mag-inc.com
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
12
13
15
18
20
23
26
29
33
37
42
47
52
58
67
75
84
92
104
119
0.0054
0.0074
0.0108
0.0164
0.0231
0.0334
0.0478
0.0668
0.0966
0.135
0.195
0.276
0.377
0.535
0.783
1.11
1.57
2.11
3.02
4.52
0.380”
0.188”
9.65mm
OD
4.78mm ID x 3.96mm HT
0.156”
5 5290A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
10.29 mm
4.27 mm
4.60 mm
Permeability (µ)
0.405 in
0.168 in
0.181 in
AL +- 8%
MPP
7
14
32
40
48
66
78
84
92
105
159
290
55293-A2
55292-A2
55291-A2
55290-A2
55289-A2
55288-A2
55284-A2
55287-A2
55285-A2
55286-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
0.1429 cm2
0.0945 cm2
2.18 cm
0.206 cm3
1.8 gm
1.7 gm
1.44 gm
0.0135 cm4
28,200 c.mils
0.01465 in2
0.859 in
0.0126 in3
0.0039 lb
0.0037 lb
0.0032 lb
0.000325 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
1.928 cm
0.0632 ft
1.768 cm
0.0580 ft
1.613 cm
0.0529 ft
1.545 cm
0.0506 ft
1.519 cm
0.0498 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
13.4 mm
8.20 mm
0.526 in
0.323 in
3.46 cm2
4.7 cm2
0.537 in2
0.729 in2
AWG
Wire Size
Turns
(u.w.f.)
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
23
28
35
43
54
66
83
105
128
157
196
241
294
365
464
576
711
868
1086
1397
High Flux
Kool Mµ
58293-A2
58292-A2
58291-A2
58290-A2
58289-A2
58288-A2
-
77291-A7
77295-A7
77294-A7
77290-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.01446
0.0228
0.0357
0.0557
0.0873
0.136
0.215
0.34
0.529
0.815
1.288
1.997
3.01
4.75
7.66
12.05
18.65
28.1
44.5
74.8
Single
Layer
Turns
12
13
15
18
20
23
26
29
33
37
42
47
52
58
67
75
84
92
104
119
Single
Layer Rdc.
(Ohms, Ω)
0.00605
0.00826
0.012
0.0182
0.0256
0.0371
0.0531
0.0743
0.107
0.15
0.217
0.307
0.42
0.594
0.871
1.24
1.74
2.34
3.35
5.02
Surface Area
Unwound Core
40% Winding Factor
www.mag-inc.com
4-10
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
Kool Mµ AL+- 12%
0.400”
0.200”
10.2mm
OD
5.08mm ID x 3.96mm HT
0.156”
5 5040A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
10.80 mm
4.57 mm
4.60 mm
Permeability (µ)
0.425 in
0.180 in
0.181 in
AL +- 8%
MPP
7
14
32
40
48
66
78
84
92
105
159
290
55043-A2
55042-A2
55041-A2
55040-A2
55039-A2
55038-A2
55034-A2
55037-A2
55035-A2
55036-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
0.164 cm2
0.1000 cm2
2.38 cm
0.238 cm3
1.91 gm.
1.80 gm
1.46 gm
0.0164 cm4
32,400 c.mils
0.01550 in2
0.906 in
0.014 in3
0.0041 lb
0.0039 lb
0.0032 lb
0.000395 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
1.986 cm
0.0651 ft
1.811 cm
0.0594 ft
1.640 cm
0.0538 ft
1.566 cm
0.0513 ft
1.537 cm
0.0504 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
Part Number
Kool Mµ AL+- 12%
14.1 mm
8.46 mm
0.554 in
0.333 in
AWG
Wire Size
Turns
(u.w.f.)
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
26
32
40
50
62
76
95
120
147
180
225
277
338
419
533
661
816
1000
1246
1604
High Flux
Kool Mµ
58043-A2
58042-A2
58041-A2
58040-A2
58039-A2
58038-A2
-
77041-A7
77845-A7
77844-A7
77040-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.01709
0.0267
0.0422
0.0659
0.1032
0.1608
0.254
0.402
0.626
0.963
1.523
2.36
3.56
5.61
9.05
14.25
22
33.3
52.6
88.4
Surface Area
Unwound Core
40% Winding Factor
4-11
3.703 cm2
5.1 cm2
0.574 in2
0.791 in2
www.mag-inc.com
Single
Layer
Turns
13
15
17
19
22
25
28
31
36
40
45
50
56
63
72
81
91
99
112
128
Single
Layer Rdc.
(Ohms, Ω)
0.00663
0.00968
0.0139
0.0195
0.0285
0.0408
0.0579
0.0804
0.119
0.164
0.236
0.33
0.457
0.654
0.947
1.35
1.9
2.56
3.66
5.46
0.440”
0.250”
11.2mm
OD
6.35mm ID x 3.96mm HT
0.156”
555130-A2
5130A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
11.81 mm
5.84 mm
4.60 mm
Permeability (µ)
0.465 in
0.230 in
0.181 in
AL +- 8%
MPP
6
11
26
32
38
53
63
68
74
85
127
55133-A2
55132-A2
55131-A2
55130-A2
55129-A2
55128-A2
55124-A2
55127-A2
55125-A2
14
26
60
75
90
125
147
160
173
200
300
Physical Characteristics
0.273 cm2
0.0906 cm2
2.69 cm
0.2437 cm3
2.12 gm
1.99 gm
1.499 gm
0.0247 cm4
53,800 c.mils
0.0140 in2
1.08 in
0.01487 in3
0.0046 lb
0.0043 lb
0.0033 lb
0.000592 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
2.195 cm
0.0720 ft
1.942 cm
0.0637 ft
1.695 cm
0.0556 ft
1.585 cm
0.0520 ft
1.545 cm
0.0507 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
15.7 mm
9.0 mm
0.618 in
0.353 in
4.31 cm2
6.0 cm2
0.669 in2
0.936 in2
AWG
Wire Size
Turns
(u.w.f.)
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
17
22
28
34
43
54
66
83
102
127
158
199
245
299
374
460
560
695
885
1098
High Flux
Kool Mµ
58133-A2
58132-A2
58131-A2
58130-A2
58129-A2
58128-A2
-
77131-A7
77335-A7
77334-A7
77130-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00533
0.00808
0.01276
0.02
0.03192
0.04958
0.07747
0.121
0.1896
0.295
0.467
0.737
1.15
1.747
2.8
4.34
6.54
10.31
16.63
26.2
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
10
11
13
15
17
20
23
26
29
33
37
42
47
52
59
66
73
82
93
105
0.00203
0.00282
0.00422
0.00612
0.00873
0.013
0.0188
0.0268
0.0378
0.0543
0.077
0.109
0.155
0.214
0.311
0.438
0.6
0.856
1.23
1.76
Surface Area
Unwound Core
40% Winding Factor
www.mag-inc.com
4-12
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
Kool Mµ AL+- 12%
0.500”
0.300”
12.7mm
OD
7.62mm ID x 4.75mm HT
0.187”
5 5050A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
13.46 mm
6.99 mm
5.51 mm
Permeability (µ)
0.530 in
0.275 in
0.217 in
MPP
6.4
12
27
34
40
56
67
72
79
90
134
255
55053-A2
55052-A2
55051-A2
55050-A2
55049-A2
55048-A2
55044-A2
55047-A2
55045-A2
55046-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
0.383 cm2
0.1140 cm2
3.12 cm
0.356 cm3
3.07 gm
2.90 gm
2.20 gm.
0.0437 cm4
75,600 c.mils
0.01767 in2
1.229 in
0.0217 in3
0.0064 lb
0.0060 lb
0.0049 lb
0.001049 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
2.49 cm
0.0815 ft
2.20 cm
0.0721 ft
1.920 cm
0.0629 ft
1.797 cm
0.0589 ft
1.751 cm
0.0574 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
Part Number
AL +- 8%
18.2 mm
11.5 mm
0.717 in
0.451 in
5.60 cm2
8.1 cm2
0.870 in2
1.26 in2
AWG
Wire Size
Turns
(u.w.f.)
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
25
31
39
48
61
76
93
116
144
178
222
280
344
420
525
646
788
977
1244
1543
High Flux
Kool Mµ
58053-A2
58052-A2
58051-A2
58050-A2
58049-A2
58048-A2
-
77051-A7
77055-A7
77054-A7
77050-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00826
0.0129
0.0203
0.0318
0.05
0.0789
0.1233
0.1925
0.302
0.47
0.743
1.173
1.829
2.81
4.45
6.9
10.4
16.4
26.5
41.6
Surface Area
Unwound Core
40% Winding Factor
4-13
www.mag-inc.com
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
12
14
16
19
21
24
28
31
35
40
45
50
56
63
71
79
87
98
112
125
0.00276
0.00406
0.00587
0.00877
0.0122
0.0176
0.026
0.0362
0.0516
0.0744
0.106
0.148
0.21
0.293
0.434
0.594
0.809
1.16
1.68
2.37
0.650”
0.400”
16.5mm
OD
10.2mm ID x 6.35mm HT
0.250”
5 5120A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
17.40 mm
9.53 mm
7.11 mm
Permeability (µ)
0.680 in
0.375 in
0.280 in
MPP
8
15
35
43
52
72
88
92
104
115
173
317
55123-A2
55122-A2
55121-A2
55120-A2
55119-A2
55118-A2
55114-A2
55117-A2
55115-A2
55116-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
0.713 cm2
0.1920 cm2
4.11 cm
0.789 cm3
6.78 gm
6.34 gm
4.98 gm
0.1369 cm4
140,600 c.mils
0.0298 in2
1.619 in
0.048 in3
0.015 lb
0.014 lb
0.011 lb
0.0029 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
3.22 cm
0.1057 ft
2.82 cm
0.0926 ft
2.44 cm
0.0798 ft
2.26 cm
0.0742 ft
2.20 cm
0.0721 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
23.7 mm
15.2 mm
0.932 in
0.599 in
9.2 cm2
13.6 cm2
1.43 in2
2.11 in2
AWG
Wire Size
Turns
(u.w.f.)
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
24
30
37
47
58
72
90
113
141
174
216
268
331
414
521
639
781
977
1202
1465
High Flux
Kool Mµ
58123-A2
58122-A2
58121-A2
58120-A2
58119-A2
58118-A2
-
77121-A7
77225-A7
77224-A7
77120-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00508
0.008
0.01257
0.01992
0.031
0.049
0.0767
0.1205
0.1903
0.297
0.464
0.728
1.133
1.792
2.83
4.41
6.79
10.74
16.64
25.1
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
12
14
16
18
21
24
27
30
34
39
44
49
56
63
70
78
87
98
108
121
Single
0.00174
0.00254
0.00366
0.00522
0.00765
0.0111
0.0157
0.0219
0.0314
0.0455
0.0644
0.0906
0.131
0.189
0.26
0.368
0.51
0.735
1.02
1.41
Surface Area
Unwound Core
40% Winding Factor
www.mag-inc.com
4-14
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
AL +- 8%
0.680”
0.380”
17.3mm
OD
9.65mm ID x 6.35mm HT
0.250”
5 5380A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
18.03 mm
9.02 mm
7.11 mm
Permeability (µ)
0.710 in
0.355 in
0.280 in
MPP
10
19
43
53
64
89
105
114
123
142
214
55383-A2
55382-A2
55381-A2
55380-A2
55379-A2
55378-A2
55374-A2
55377-A2
55375-A2
14
26
60
75
90
125
147
160
173
200
300
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
0.576 cm2
0.232 cm2
4.14 cm
0.960 cm3
8.16 gm
7.7 gm
5.9 gm
0.134 cm4
126,000 c.mils
0.0360 in2
1.63 in
0.059 in3
0.018 lb
0.017 lb
0.013 lb
0.00321 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
3.67 cm
0.1204 ft
3.15 cm
0.1032 ft
2.64 cm
0.0864 ft
2.41 cm
0.0791 ft
2.33 cm
0.0763 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
Part Number
AL +- 8%
24.9 mm
16.3 mm
0.980 in
0.641 in
9.9 cm2
14.7 cm2
1.53 in2
2.28 in2
AWG
Wire Size
Turns
(u.w.f.)
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
21
26
33
42
52
64
80
100
126
155
193
240
296
370
466
572
700
875
1076
1312
High Flux
Kool Mµ
58383-A2
58382-A2
58381-A2
58380-A2
58379-A2
58378-A2
-
77381-A7
77385-A7
77384-A7
77380-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00506
0.00789
0.0126
0.0203
0.0316
0.0492
0.0775
0.122
0.194
0.302
0.472
0.743
1.15
1.83
2.88
4.49
6.84
10.96
16.97
25.6
Surface Area
Unwound Core
40% Winding Factor
4-15
www.mag-inc.com
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
11
13
15
17
19
22
25
29
32
37
41
46
52
59
66
74
82
92
102
114
0.00167
0.0025
0.00364
0.00521
0.00732
0.0107
0.0154
0.0224
0.0215
0.0313
0.0457
0.0635
0.0902
0.129
0.185
0.259
0.369
0.508
0.73
1.02
0.800”
0.500”
20.3mm
OD
12.7mm ID x 6.35mm HT
0.250”
5 5206A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
21.1 mm
12.07 mm
7.11 mm
Permeability (µ)
0.830 in
0.475 in
0.280 in
MPP
7.8
14
32
41
49
68
81
87
96
109
163
320
55209-A2
55208-A2
55848-A2
55206-A2
55205-A2
55204-A2
55200-A2
55203-A2
55201-A2
55202-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
1.14 cm2
0.226 cm2
5.09 cm
1.15 cm3
9.4 gm
8.9 gm
7.1 gm
0.258 cm4
225,600 c.mils
0.0350 in2
2.01 in
0.0703 in3
0.023 lb
0.022 lb
0.016 lb
0.00620 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
3.67 cm
0.1204 ft
3.15 cm
0.1032 ft
2.64 cm
0.0864 ft
2.41 cm
0.0791 ft
2.33 cm
0.0763 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
29.2 mm
17.4 mm
1.148 in
0.648 in
12.1 cm2
18.9 cm2
1.88 in2
2.93 in2
AWG
Wire Size
Turns
(u.w.f.)
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
25
31
39
48
60
75
93
116
145
181
226
279
347
430
531
664
836
1026
1253
1567
High Flux
Kool Mµ
58209-A2
58208-A2
58848-A2
58206-A2
58205-A2
58204-A2
-
77848-A7
77211-A7
77210-A7
77206-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00374
0.00591
0.00929
0.01463
0.023
0.0364
0.0567
0.0895
0.1402
0.22
0.348
0.543
0.848
1.33
2.07
3.28
5.17
8.06
12.41
19.62
Single
Layer
Turns
12
14
16
18
21
24
27
31
35
39
45
50
56
63
71
80
89
100
111
125
Single
Layer Rdc.
(Ohms, Ω)
0.001354
0.0017
0.00245
0.00347
0.0051
0.00736
0.0104
0.0151
0.0215
0.0301
0.0439
0.0618
0.0867
0.124
0.176
0.25
0.349
0.498
0.688
0.992
Surface Area
Unwound Core
40% Winding Factor
www.mag-inc.com
4-16
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
AL +- 8%
0.900”
0.550”
22.9mm
OD
14.0mm ID x 7.62mm HT
0.300”
5 5310A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
23.6 mm
13.34 mm
8.38 mm
Permeability (µ)
0.930 in
0.525 in
0.330 in
MPP
9.9
19
43
54
65
90
106
115
124
144
216
396
55313-A2
55312-A2
55059-A2
55310-A2
55309-A2
55308-A2
55304-A2
55307-A2
55305-A2
55306-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
1.41 cm2
0.331 cm2
5.67 cm
1.88 cm3
15.9 gm
15.0 gm
11.5 gm
0.467 cm4
277,700 c.mils
0.0513 in2
2.23 in
0.114 in3
0.034 lb
0.032 lb
0.025 lb
0.01119 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
4.29 cm
0.1405 ft
3.67 cm
0.1203 ft
3.07 cm
0.1005 ft
2.80 cm
0.0919 ft
2.70 cm
0.0886 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
Part Number
AL +- 8%
32.6 mm
19.8 mm
1.283 in
0.778 in
15.7 cm2
23.8 cm2
2.43 in2
3.69 in2
AWG
Wire Size
Turns
(u.w.f.)
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
24
30
38
47
59
74
93
115
143
178
222
278
343
427
529
653
817
1029
1262
1543
High Flux
Kool Mµ
58313-A2
58312-A2
58059-A2
58310-A2
58309-A2
58308-A2
-
77312-A7
77059-A7
77315-A7
77314-A7
77310-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00339
0.00537
0.00849
0.01334
0.0211
0.033
0.0523
0.0814
0.1285
0.201
0.316
0.499
0.78
1.219
1.91
2.97
4.71
7.43
11.58
17.82
Surface Area
Unwound Core
40% Winding Factor
4-17
www.mag-inc.com
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
12
14
16
18
21
24
27
31
35
39
44
50
56
63
71
80
89
99
111
124
0.00106
0.00156
0.00226
0.0032
0.0047
0.00676
0.00961
0.0138
0.0198
0.0278
0.0395
0.0565
0.0804
0.113
0.161
0.229
0.324
0.45
0.642
0.892
0.928”
0.567”
23.6mm
OD
14.4mm ID x 8.89mm HT
0.350”
5 5350A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
24.3 mm
13.77 mm
9.65 mm
Permeability (µ)
0.958 in
0.542 in
0.380 in
MPP
12
22
51
63
76
105
124
135
146
169
253
55353-A2
55352-A2
55351-A2
55350-A2
55349-A2
55348-A2
55344-A2
55347-A2
55345-A2
14
26
60
75
90
125
147
160
173
200
300
Physical Characteristics
1.49 cm2
0.388 cm2
5.88 cm
2.28 cm3
19.9 gm
18.8 gm
14.0 gm
0.578 cm4
293,800 c.mils
0.061 in2
2.32 in
0.142 in3
0.042 lb
0.040 lb
0.031 lb
0.0139 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
4.49 cm
0.1473 ft
3.91 cm
0.1282 ft
3.34 cm
0.1095 ft
3.09 cm
0.1013 ft
3.00 cm
0.0982 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
33.5 mm
21.4 mm
1.319 in
0.843 in
17.9 cm2
26.3 cm2
2.78 in2
4.08 in2
AWG
Wire Size
Turns
(u.w.f.)
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
20
26
32
40
50
63
78
98
121
157
188
235
294
363
452
560
691
864
1088
1335
High Flux
Kool Mµ
58353-A2
58352-A2
58351-A2
58350-A2
58349-A2
58348-A2
-
77352-A7
77351-A7
77355-A7
77354-A7
77350-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00238
0.00376
0.00595
0.00941
0.0148
0.0233
0.0366
0.058
0.0903
0.1425
0.223
0.351
0.554
0.865
1.351
2.12
3.3
5.22
8.24
12.84
Single
Layer
Turns
11
13
15
17
19
22
25
28
32
36
40
46
51
58
65
73
82
92
102
114
Single
Layer Rdc.
(Ohms, Ω)
0.000853
0.00127
0.00186
0.00265
0.00373
0.00544
0.00781
0.0111
0.0159
0.0226
0.0316
0.0458
0.0691
0.0923
0.13
0.184
0.261
0.37
0.515
0.731
Surface Area
Unwound Core
40% Winding Factor
www.mag-inc.com
4-18
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
AL +- 8%
1.060”
0.580”
26.9mm
OD
14.7mm ID x 11.2mm HT
0.440”
5 5930A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
27.7 mm
14.10 mm
11.94 mm
Permeability (µ)
1.090 in
0.555 in
0.470 in
MPP
18
32
75
94
113
157
185
201
217
251
377
740
55933-A2
55932-A2
55894-A2
55930-A2
55929-A2
55928-A2
55924-A2
55927-A2
55925-A2
55926-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
1.56 cm2
0.654 cm2
6.35 cm
4.15 cm3
35.8 gm
33.8 gm
25.5 gm
1.020 cm4
308,000 c.mils
0.1014 in2
2.50 in
0.254 in3
0.080 lb
0.075 lb
0.056 lb
0.0245 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
5.23 cm
0.1714 ft
4.66 cm
0.1526 ft
4.10 cm
0.1344 ft
3.85 cm
0.1263 ft
3.76 cm
0.1233 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
Part Number
AL +- 8%
37.3 mm
24.0 mm
1.468 in
0.944 in
24.7 cm2
33.8 cm2
3.83 in2
5.24 in2
AWG
Wire Size
Turns
(u.w.f.)
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
21
27
34
42
53
66
82
103
127
159
197
246
308
380
474
587
725
906
1141
1400
High Flux
Kool Mµ
58933-A2
58932-A2
58894-A2
58930-A2
58929-A2
58928-A2
-
77932-A7
77894-A7
77935-A7
77934-A7
77930-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00291
0.00459
0.00726
0.01148
0.01805
0.0284
0.0447
0.0707
0.1102
0.1739
0.272
0.428
0.676
1.056
1.649
2.58
4.02
6.37
10.05
15.67
Surface Area
Uwound Core
40% Winding Factor
4-19
www.mag-inc.com
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
11
13
15
17
20
22
25
29
33
37
42
47
53
60
66
75
84
94
105
117
0.00107
0.0016
0.00233
0.00333
0.00494
0.00685
0.0098
0.0144
0.0203
0.0291
0.0416
0.0587
0.0835
0.12
0.165
0.237
0.335
0.476
0.744
0.942
1.300”
0.785”
33.0mm
OD
19.9mm ID x 10.7mm HT
0.420”
5 5548A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
33.8 mm
19.30 mm
11.43 mm
Permeability (µ)
1.330 in
0.760 in
0.450 in
MPP
14
28
61
76
91
127
150
163
176
203
305
559
55551-A2
55550-A2
55071-A2
55548-A2
55547-A2
55546-A2
55542-A2
55545-A2
55543-A2
55544-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
2.93 cm2
0.672 cm2
8.15 cm
5.48 cm3
46.9 gm
44.2 gm
33.7 gm
1.969 cm4
577,600 c.mils
0.1042 in2
3.21 in
0.334 in3
0.106 lb
0.100 lb
0.074 lb
0.0473 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
5.93 cm
0.1943 ft
5.09 cm
0.1668 ft
4.27 cm
0.1400 ft
3.91 cm
0.1282 ft
3.78 cm
0.1238 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
46.7 mm
28.0 mm
1.840 in
1.103 in
31.5 cm2
48.0 cm2
4.88 in2
7.44 in2
AWG
Wire Size
Turns
(u.w.f.)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
32
40
50
63
79
99
123
154
193
239
298
370
462
578
713
889
1100
1359
1699
2139
High Flux
Kool Mµ
58551-A2
58550-A2
58071-A2
58548-A2
58547-A2
58546-A2
-
77550-A7
77071-A7
77553-A7
77552-A7
77548-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00393
0.00618
0.00976
0.01544
0.0244
0.0384
0.0604
0.0949
0.1504
0.234
0.37
0.579
0.909
1.437
2.24
3.5
5.49
8.56
13.53
21.4
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
15
17
19
22
25
28
32
36
41
46
52
58
65
74
83
92
103
116
130
145
0.00117
0.00166
0.00236
0.00343
0.0055
0.00693
0.00999
0.0142
0.0204
0.0288
0.0411
0.0578
0.0815
0.118
0.166
0.231
0.328
0.465
0.66
0.922
Surface Area
Unwound Core
40% Winding Factor
www.mag-inc.com
4-20
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
AL +- 8%
1.350”
0.920”
34.3mm
OD
23.4mm ID x 8.89mm HT
0.350”
5 5585A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
35.2 mm
22.6 mm
9.78 mm
Permeability (µ)
1.385 in
0.888 in
0.385 in
MPP
9
16
38
47
57
79
93
101
109
126
190
348
55588-A2
55587-A2
55586-A2
55585-A2
55584-A2
55583-A2
55579-A2
55582-A2
55580-A2
55581-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
4.01 cm2
0.454 cm2
8.95 cm
4.06 cm3
34.9 gm
32.9 gm
25.0 gm
1.821 cm4
788,500 c.mils
0.0704 in2
3.53 in
0.249 in3
0.081 lb
0.076 lb
0.055 lb
0.0436 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
5.87 cm
0.1923 ft
4.84 cm
0.1586 ft
3.84 cm
0.1258 ft
3.39 cm
0.1113 ft
3.23 cm
0.1059 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
Part Number
AL +- 8%
50.1 mm
29.0 mm
1.974 in
1.142 in
29.3 cm2
51.3 cm2
4.537 in2
7.95 in2
AWG
Wire Size
Turns
(u.w.f.)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
44
55
69
86
108
135
168
210
263
326
406
505
631
789
974
1213
1502
1855
2319
2921
High Flux
Kool Mµ
58588-A2
58587-A2
58586-A2
58585-A2
58584-A2
58583-A2
-
77587-A7
77586-A7
77590-A7
77589-A7
77585-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00531
0.00835
0.01319
0.0209
0.033
0.0518
0.0817
0.1283
0.203
0.316
0.499
0.782
1.229
1.941
3.03
4.74
7.43
11.56
18.29
28.9
Surface Area
Unwound Core
40% Winding Factor
4-21
www.mag-inc.com
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
18
20
23
26
30
34
38
43
48
54
61
69
77
87
98
109
122
137
153
170
0.0012
0.00168
0.00243
0.00348
0.00505
0.0072
0.0101
0.0145
0.0205
0.0288
0.0413
0.0665
0.0826
0.118
0.168
0.234
0.322
0.47
0.665
0.925
1.410”
0.880”
35.8mm
OD
22.4mm ID x 10.5mm HT
0.412”
5 5324A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
36.7 mm
21.5 mm
11.35 mm
Permeability (µ)
1.445 in
0.848 in
0.447 in
MPP
13
24
56
70
84
117
138
150
162
187
281
515
55327-A2
55326-A2
55076-A2
55324-A2
55323-A2
55322-A2
55318-A2
55321-A2
55319-A2
55320-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
3.64 cm2
0.678 cm2
8.98 cm
6.088 cm3
51.8 gm
48.9 gm
37.4 gm
2.47 cm4
719,100 c.mils
0.1051 in2
3.54 in
0.372 in3
0.112 lb
0.106 lb
0.082 lb
0.0594 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
6.22 cm
0.2040 ft
5.27 cm
0.1727 ft
4.34 cm
0.1422 ft
3.93 cm
0.1288 ft
3.78 cm
0.1238 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
51.1 mm
29.6 mm
2.01 in
1.165 in
AWG
Wire Size
Turns
(u.w.f.)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
40
50
63
79
98
123
154
191
240
297
371
461
575
719
888
1106
1370
1692
2115
2663
High Flux
Kool Mµ
58327-A2
58326-A2
58076-A2
58324-A2
58323-A2
58322-A2
-
77326-A7
77076-A7
77329-A7
77328-A7
77324-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00513
0.00807
0.01275
0.0202
0.0319
0.0501
0.079
0.124
0.1965
0.306
0.483
0.757
1.188
1.877
2.93
4.58
7.18
11.18
17.68
27.9
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
17
19
22
25
28
32
36
41
46
52
58
65
73
82
93
103
116
130
146
161
0.00133
0.00185
0.00273
0.0039
0.00551
0.00792
0.0112
0.0162
0.0229
0.0325
0.0458
0.0648
0.0915
0.13
0.187
0.259
0.368
0.521
0.741
1.02
Surface Area
Unwound Core
40% Winding Factor
34.5 cm2
55.1 cm2
5.35 in2
8.54 in2
www.mag-inc.com
4-22
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
AL +- 8%
1.570”
0.950”
39.9mm
OD
24.1mm ID x 14.5mm HT
0.570”
5 5254A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
40.8 mm
23.3 mm
15.37 mm
Permeability (µ)
1.605 in
0.918 in
0.605 in
MPP
19
35
81
101
121
168
198
215
233
269
403
740
55257-A2
55256-A2
55083-A2
55254-A2
55253-A2
55252-A2
55248-A2
55251-A2
55249-A2
55250-A2
14
26
60
75
90
125
147
160
173
200
300
550
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
4.27 cm2
1.072 cm2
9.84 cm
10.5 cm3
91.7 gm
86.5 gm
64.9 gm
4.58 cm4
842,700 c.mils
0.1662 in2
3.88 in
0.645 in3
0.206 lb
0.194 lb
0.143 lb
0.1100 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
7.38 cm
0.242 ft
6.38 cm
0.209 ft
5.40 cm
0.1772 ft
4.97 cm
0.1631 ft
4.81 cm
0.1578 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
56.4 mm
35.2 mm
Part Number
AL +- 8%
2.22 in
1.385 in
AWG
Wire Size
Turns
(u.w.f.)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
47
59
73
92
115
144
180
224
281
348
434
540
674
843
1040
1297
1605
1983
2479
3121
High Flux
Kool Mµ
58257-A2
58256-A2
58083-A2
58254-A2
58253-A2
58252-A2
-
77256-A7
77083-A7
77259-A7
77258-A7
77254-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00714
0.01123
0.01774
0.0281
0.0444
0.0698
0.1099
0.1726
0.273
0.426
0.672
1.053
1.653
2.61
4.08
6.37
9.99
15.55
24.6
38.8
Surface Area
Unwound Core
40% Winding Factor
4-23
48.4 cm2
71.7 cm2
7.5 in2
11.1 in2
www.mag-inc.com
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
18
21
24
27
31
35
39
44
50
56
63
71
80
90
101
112
126
141
158
175
0.00179
0.00263
0.00378
0.00537
0.00778
0.0111
0.0155
0.0221
0.0317
0.0446
0.0636
0.0902
0.128
0.182
0.259
0.359
0.511
0.721
1.02
1.42
1.840”
0.950”
46.7mm
OD
24.1mm ID x 18.0mm HT
0.710”
5 5438A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
47.6 mm
23.3 mm
18.92 mm
Permeability (µ)
1.875 in
0.918 in
0.745 in
MPP
32
59
135
169
202
281
330
360
390
450
674
55441-A2
55440-A2
55439-A2
55438-A2
55437-A2
55436-A2
55432-A2
55435-A2
55433-A2
14
26
60
75
90
125
147
160
173
200
300
Physical Characteristics
4.27 cm2
1.990 cm2
10.74 cm
21.3 cm3
181 gm
171 gm
131.4 gm
8.50 cm4
842,700 c.mils
0.308 in2
4.23 in
1.30 in3
0.399 lb
0.378 lb
0.29 lb
0.204 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
8.66 cm
0.284 ft
7.71 cm
0.253 ft
6.78 cm
0.222 ft
6.37 cm
0.209 ft
6.22 cm
0.204 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
63.8 mm
38.7 mm
2.51 in
1.525 in
AWG
Wire Size
Turns
(u.w.f.)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
47
59
73
92
115
144
180
224
281
348
434
540
674
843
1040
1297
1605
1983
2479
3121
High Flux
Kool Mµ
58441-A2
58440-A2
58439-A2
58438-A2
-
77440-A7
77439-A7
77443-A7
77442-A7
77438-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00837
0.01317
0.0208
0.0329
0.052
0.0818
0.1288
0.202
0.32
0.499
0.788
1.234
1.938
3.06
4.78
7.47
11.71
18.23
28.8
45.5
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
18
21
24
27
31
35
39
44
50
56
63
71
80
90
101
112
126
141
158
175
0.00231
0.00339
0.0049
0.00694
0.01
0.0143
0.0201
0.0285
0.041
0.0577
0.0821
0.116
0.166
0.236
0.334
0.464
0.66
0.932
1.32
1.83
Surface Area
Unwound Core
40% Winding Factor
69.3 cm2
94.3 cm2
10.7 in2
14.6 in2
www.mag-inc.com
4-24
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
AL +- 8%
1.840”
1.130”
46.7mm
OD
28.7mm ID x 15.2mm HT
0.600”
5 5089A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
47.6 mm
27.9 mm
16.13 mm
Permeability (µ)
1.875 in
1.098 in
0.635 in
MPP
20
37
86
107
128
178
210
228
246
285
427
55092-A2
55091-A2
55090-A2
55089-A2
55088-A2
55087-A2
55082-A2
55086-A2
55084-A2
14
26
60
75
90
125
147
160
173
200
300
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
6.11 cm2
1.340 cm2
11.63 cm
15.58 cm3
130.4 gm
123 gm
95.8 gm
8.19 cm4
1,206,000 c.mils
0.208 in2
4.58 in
0.953 in3
0.287 lb
0.271 lb
0.211 lb
0.1971 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
8.34 cm
0.273 ft
7.12 cm
0.233 ft
5.92 cm
0.194 ft
5.40 cm
0.177 ft
5.20 cm
0.171 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
Part Number
AL +- 8%
66.3 mm
39.8 mm
2.61 in
1.568 in
61.7 cm2
95.1 cm2
9.56 in2
14.74 in2
AWG
Wire Size
Turns
(u.w.f.)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
67
84
105
132
165
206
258
321
402
498
621
773
964
1206
1488
1855
2296
2837
3546
4465
High Flux
Kool Mµ
58092-A2
58091-A2
58090-A2
58089-A2
-
77091-A7
77090-A7
77094-A7
77093-A7
77089-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.01153
0.01814
0.0287
0.0453
0.0717
0.1127
0.1774
0.279
0.442
0.688
1.085
1.7
2.67
4.22
6.59
10.29
16.13
25.1
39.7
62.7
Surface Area
Unwound Core
40% Winding Factor
4-25
www.mag-inc.com
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
23
26
29
33
37
42
47
54
60
68
76
86
96
108
121
135
152
170
190
211
0.00247
0.0035
0.00494
0.00709
0.01
0.0143
0.0202
0.0293
0.0411
0.0664
0.0828
0.118
0.166
0.236
0.335
0.468
0.666
0.939
1.33
1.86
2.000”
1.250”
50.8mm
OD
31.8mm ID x 13.5mm HT
0.530”
5 5715A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
51.7 mm
30.9 mm
14.35 mm
Permeability (µ)
2.035 in
1.218 in
0.565 in
MPP
17
32
73
91
109
152
179
195
210
243
365
55718-A2
55717-A2
55716-A2
55715-A2
55714-A2
55713-A2
55709-A2
55712-A2
55710-A2
14
26
60
75
90
125
147
160
173
200
300
Physical Characteristics
7.50 cm2
1.251 cm2
12.73 cm
15.93 cm3
141 gm
133 gm
98.1 gm
9.38 cm4
1,484,000 c.mils
0.194 in2
5.02 in
0.974 in3
0.312 lb
0.294 lb
0.216 lb
0.226 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
8.51 cm
0.279 ft
7.12 cm
0.234 ft
5.77 cm
0.189 ft
5.18 cm
0.170 ft
4.95 cm
0.162 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
72.4 mm
40.6 mm
2.85 in
1.600 in
AWG
Wire Size
Turns
(u.w.f.)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
82
103
129
162
203
254
317
395
495
613
765
951
1187
1484
1832
2282
2826
3491
4363
5495
High Flux
Kool Mµ
58718-A2
58717-A2
58716-A2
58715-A2
-
77717-A7
77716-A7
77720-A7
77719-A7
77715-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.0144
0.0228
0.036
0.0569
0.09
0.1415
0.223
0.35
0.555
0.864
1.363
2.14
3.35
5.3
8.28
12.93
20.3
31.6
49.9
78.8
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
25
29
33
37
42
47
53
60
67
76
85
95
107
120
135
150
168
188
211
234
0.0025
0.00369
0.00533
0.00752
0.0108
0.0153
0.0217
0.031
0.0437
0.0622
0.0882
0.121
0.176
0.25
0.354
0.494
0.701
0.989
1.4
1.95
Surface Area
Unwound Core
40% Winding Factor
64.2 cm2
106.3 cm2
9.95 in2
16.48 in2
www.mag-inc.com
4-26
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
AL +- 8%
2.250”
1.039”
57.2mm
OD
26.4mm ID x 15.2mm HT
0.600”
5 5195A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
58.0 mm
25.6 mm
16.1 mm
Permeability (µ)
2.285 in
1.007 in
0.635 in
MPP
32
60
138
172
207
287
306
333
360
417
55190-A2
55191-A2
55192-A2
55195-A2
55196-A2
55197-A2
55198-A2
55199-A2
14
26
60
75
90
125
147
160
173
200
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
5.14 cm2
2.29 cm2
12.5 cm
28.6 cm3
240 gm
226 gm
176 gm
11.8 cm4
1,014,049 c.mils
0.355 in2
4.93 in
1.75 in3
0.527 lb
0.497 lb
0.388 lb
0.283 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
9.02 cm
0.296 ft
8.35 cm
0.274 ft
7.62 cm
0.250 ft
7.01 cm
0.230 ft
6.46 cm
0.212 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
Part Number
AL +- 8%
75.7 mm
34.0 mm
2.98 in
1.34 in
91.0 cm2
115 cm2
14.1 in2
17.8 in2
AWG
Wire Size
Turns
(u.w.f.)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
56
70
88
110
138
173
216
269
338
419
522
650
811
1014
1252
1560
1931
2386
2982
3755
High Flux
Kool Mµ
58190-A2
58191-A2
58192-A2
58195-A2
-
77191-A7
77192-A7
77193-A7
77194-A7
77195-A7
-
Rdc
(Ohms, Ω)
(u.w.f.)
0.00967
0.0151
0.0241
0.0379
0.0601
0.0948
0.149
0.234
0.372
0.58
0.914
1.43
2.25
3.55
5.55
8.67
13.6
21.2
33.5
52.9
Surface Area
Unwound Core
40% Winding Factor
4-27
www.mag-inc.com
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
20
23
26
30
34
39
43
49
55
62
70
78
88
99
111
124
138
156
174
193
0.00267
0.00385
0.00551
0.00801
0.0115
0.0165
0.023
0.033
0.0469
0.0664
0.0948
0.133
0.189
0.269
0.381
0.534
0.752
1.07
1.51
2.10
2.250”
1.400”
57.2mm
OD
35.6mm ID x 14.0mm HT
0.550”
5 5109A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
58.0 mm
34.7 mm
14.86 mm
Permeability (µ)
2.285 in
1.368 in
0.585 in
MPP
18
33
75
94
112
156
185
200
218
250
374
55112-A2
55111-A2
55110-A2
55109-A2
55108-A2
55107-A2
55103-A2
55106-A2
55104-A2
14
26
60
75
90
125
147
160
173
200
300
Physical Characteristics
9.48 cm2
1.444 cm2
14.30 cm
20.65 cm3
175 gm
165 gm
127 gm
13.69 cm4
1,871,000 c.mils
0.224 in2
5.63 in
1.260 in3
0.387 lb
0.365 lb
0.280 lb
0.329 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
9.33 cm
0.306 ft
7.76 cm
0.254 ft
6.23 cm
0.204 ft
5.56 cm
0.182 ft
5.30 cm
0.174 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
81.3 mm
44.4 mm
3.20 in
1.748 in
76.8 cm2
130.7 cm2
11.9 in2
20.26 in2
High Flux
Kool Mµ
58112-A2
58111-A2
58110-A2
58109-A2
-
77111-A7
77110-A7
77214-A7
77213-A7
77109-A7
-
AWG
Wire Size
Turns
(u.w.f.)
Rdc
(Ohms, Ω)
(u.w.f.)
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
104
130
163
204
256
320
400
498
624
773
965
1200
1497
1871
2310
2879
3565
4403
5504
6931
0.02
0.0315
0.0498
0.0787
0.1245
0.1957
0.308
0.484
0.767
1.195
1.886
2.95
4.64
7.33
11.45
17.88
28
43.6
69
109
29
33
37
42
48
54
60
68
76
85
96
108
120
135
152
169
189
212
237
263
0.00318
0.00453
0.00644
0.0092
0.0133
0.0188
0.0263
0.0376
0.0531
0.0746
0.107
0.152
0.211
0.3
0.428
0.596
0.845
1.19
1.69
2.35
Surface Area
Unwound Core
40% Winding Factor
www.mag-inc.com
4-28
Core Data
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
Part Number
AL +- 8%
3.063”
1.938”
77.8mm
OD
49.2mm ID x 12.7mm HT
0.500”
5 5866A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
78.9 mm
48.2 mm
13.84 mm
Permeability (µ)
3.108 in
1.898 in
0.545 in
MPP
16
30
68
142
55869-A2
55868-A2
55867-A2
55866-A2
14
26
60
125
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
17.99 cm2
1.77 cm2
20.0 cm
34.7 cm3
288 gm
272 gm
213 gm
31.8 cm4
3,550,000 c.mils
0.274 in2
7.72 in
2.115 in3
0.635 lb
0.599 lb
0.467 lb
0.765 in4
Winding Turn Length
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
LENGTH/TURN
10.40 cm
0.340 ft
8.60 cm
0.282 ft
6.90 cm
0.226 ft
6.15 cm
0.202 ft
5.90 cm
0.193 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
112 mm
54.3 mm
Part Number
AL +- 8%
4.40 in
2.14 in
High Flux
Kool Mµ
58869-A2
58868-A2
58867-A2
58866-A2
77868-A7
-
AWG
Wire Size
Turns
(u.w.f.)
Rdc
(Ohms, Ω)
(u.w.f.)
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
197
248
309
388
486
608
760
944
1182
1465
1830
2275
2840
3550
4390
5470
6770
8350
10450
13150
0.0422
0.0664
0.105
0.1663
0.262
0.412
0.65
1.022
1.616
2.52
3.98
6.23
9.8
15.45
24.2
37.4
59.2
92
145.8
229
41
47
53
60
67
76
84
95
106
119
134
150
168
188
211
235
263
295
330
365
0.00552
0.00794
0.0113
0.0162
0.0228
0.0325
0.0454
0.0646
0.0912
0.129
0.183
0.258
0.364
0.514
0.732
1.02
1.3
1.84
2.61
3.62
Surface Area
Unwound Core
40% Winding Factor
4-29
117.5 cm2
203.1 cm2
18.2 in2
31.49 in2
www.mag-inc.com
3.063”
1.938”
77.8mm
OD
49.2mm ID x 15.9mm HT
0.625”
5 5906A2
Core Dimensions (after finish)
O.D. (max.)
I.D. (min)
HT. (max.)
78.9 mm
48.2 mm
17.02 mm
Permeability (µ)
3.108 in
1.898 in
0.670 in
MPP
20
37
85
178
55909-A2
55908-A2
55907-A2
55906-A2
14
26
60
125
Physical Characteristics
Window Area
Cross Section
Path Length
Volume
Weight- MPP
Weight- High Flux
Weight- Kool Mµ
Area Product
17.99 cm2
2.27 cm2
19.95 cm
45.3 cm3
377 gm
356 gm
279 gm
40.8 cm4
3,550,000 c.mils
0.352 in2
7.86 in
2.77 in3
0.832 lb
0.785 lb
0.615 lb
0.982 in4
Winding Turn Length
LENGTH/TURN
11.00 cm
0.361 ft
9.24 cm
0.303 ft
7.53 cm
0.247 ft
6.80 cm
0.223 ft
6.52 cm
0.214 ft
Wound Coil Dimensions
Max. O.D. (u.w.f.)
Max. HT. (u.w.f.)
113 mm
57.7 mm
4.45 in
2.27 in
High Flux
Kool Mµ
58909-A2
58908-A2
58907-A2
58906-A2
77908-A7
-
AWG
Wire Size
Turns
(u.w.f.)
Rdc
(Ohms, Ω)
(u.w.f.)
Single
Layer
Turns
Single
Layer Rdc.
(Ohms, Ω)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
197
248
309
388
486
608
760
944
1182
1465
1830
2275
2840
3550
4390
5470
6770
8350
10450
13150
0.0418
0.0705
0.1115
0.1766
0.278
0.437
0.69
1.085
1.716
2.67
4.23
6.61
10.4
16.4
25.7
39.7
62.9
97.7
154.8
243.1
41
47
53
60
67
76
84
95
106
119
134
150
168
188
211
235
263
295
330
365
0.00612
0.0088
0.0125
0.018
0.0253
0.036
0.0503
0.0716
0.101
0.143
0.203
0.286
0.404
0.57
0.812
1.13
1.44
2.04
2.89
4.01
Surface Area
Unwound Core
40% Winding Factor
130 cm2
225.2 cm2
20.1 in2
34.90 in2
www.mag-inc.com
4-30
Core Data
WINDING FACTOR
100% (Unity)
60%
40%
20%
0%
Part Number
AL +- 8%
Kool Mµ® E Core Data
C
B
L
Additional Kool Mµ E Core sizes being tooled:
K1207-E (EF12.6)
K3007-E (DIN 30/7)
K7228-E (F11)
K8020-E (Metric E80)
F
A
E
M
D
PART NO.
A
B
C
D (min)
E (min)
F
L (nom)
M (min)
K1808-E
(EI-187)
in.
(mm)
.760±.012 .319±.007
(19.30)
(8.10)
.188±.006
(4.78)
.218
(5.54)
.548
(13.9)
.188±.005
(4.78)
.094
(2.39)
.183
(4.65)
K2510-E
(E-2425)
in.
(mm)
1.000±.010 .375±.005
(25.40)
(9.53)
.250±.004
(6.53)
.245
(6.22)
.740
(18.8)
.250±.005
(6.22)
.125
(3.17)
.246
(6.25)
K3515-E
(EI-375)
in.
(mm)
1.360±.015 .557±.005
(34.54)
(14.10)
.368±.007
(9.35)
.380
(9.65)
.995
(25.3)
.367±.008
(9.32)
.175
(4.45)
.310
(7.87)
K4017-E
(EE 42/11)
in.
(mm)
1.687±.025 .830±.007
(42.8)
(21.1)
.424±.010
(10.8)
.587
(15.0)
1.195
(30.4)
.468±.010
(11.9)
.234
(5.95)
.365
(9.27)
K4020-E
(DIN 42/15)
in.
(mm)
1.687±.025 .830±.007
(42.8)
(21.1)
.608±.010
(15.4)
.587
(15.0)
1.195
(30.4)
.468±.010
(11.9)
.234
(5.95)
.365
(9.27)
K4022-E
(DIN 42/20)
in.
(mm)
1.687±.025 .830±.007
(42.8)
(21.1)
.788±.010
(20.0)
.587
(15.0)
1.195
(30.4)
.468±.010
(11.9)
.234
(5.95)
.365
(9.27)
K4317-E
(EI-21)
in.
(mm)
1.609±.015 .650±.006
(40.9)
(16.5)
.493±.007
(12.5)
.410
(10.4)
1.115
(28.3)
.493±.007
(12.5)
.238
(6.0)
.310
(7.9)
K5528-E
(DIN 55/21)
in.
(mm)
2.16±.025 1.085±.016
(54.90)
(27.60)
.812±.015
(20.6)
.730
(18.5)
1.476
(37.5)
.660±.015
(16.8)
.330
(8.38)
.405
(10.30)
K5530-E
(DIN 55/21)
in.
(mm)
2.16±.025 1.085±.016
(54.90)
(27.60)
.969±.015
(24.61)
.730
(18.5)
1.476
(37.5)
.660±.015
(16.8)
.330
(8.38)
.405
(10.30)
AL MH/100 TURNS±8%
26µ
40µ
60µ
90µ
Path Length
Le (cm)
Cross Section
AE (cm2)
Volume
Ve (cm2)
26
39
56
56
80
104
88
116
138
35
52
75
76
108
140
119
157
187
48
70
102
105
150
194
163
219
261
69
100
146
151
217
281
234
-
4.01
4.85
6.94
9.84
9.84
9.84
7.75
12.3
12.3
0.228
0.385
0.840
1.28
1.83
2.37
1.52
3.50
4.17
0.914
1.87
5.83
12.6
18.0
23.3
11.8
43.1
51.4
PART NO.
K1808-E***
K2510-E***
K3515-E***
K4017-E***
K4020-E***
K4022-E***
K4317-E***
K5528-E***
K5530-E***
*** Add material code to part number, e.g., for 60µ the complete part number is K1808-E060
4-31
www.mag-inc.com
Kool Mµ® E Core DC Bias
Kool Mµ E cores are available in four permeabilities,
26µ, 40µ, 60µ, and 90µ. The magnetic data for each
core is shown in the table below. The most critical
parameter of a switching regulator inductor material
is its ability to provide inductance, or permeability,
under DC bias. The graph below shows the
reduction of permeability as a function of DC bias.
The distributed air gap of Kool Mµ results in a soft
inductance versus DC bias curve. In most
applications, this swinging inductance is desirable
since it improves efficiency and accommodates a
wide operating range. With a fixed current
requirement, the soft inductance versus DC bias
curve provides added protection against overload
conditions. The chart below is plotted on a semi-log
scale to show the DC bias characteristics at high
currents.
0.9
26
0.8
µ
0.7
40
0.6
µ
0.5
60
0.4
µ
0.3
90
0.2
µ
Per Unit of Initial Permeability
1.0
0.1
0.0
1
10
100
1000
Core Data
DC Magnetizing Force (Oersteds)
www.mag-inc.com
4-32
MPP THINZ Core Data
TM
Special core heights are available,
consult factory.
B A
C
PART NO.
A nom.
B nom.
C nom.
A max.
B min.
C max.
M-0301-T
in.
(mm)
.120
(3.05)
.070
(1.78)
.032
(.81)
.123
(3.12)
.067
(1.70)
.035
(.89)
M-0302-T
in.
(mm)
.140
(3.55)
.070
(1.78)
.032
(.81)
.143
(3.63)
.067
(1.70)
.035
(.89)
M-0402-T
in.
(mm)
. 155
(3.94)
.088
(2.23)
.032
(.81)
.159
(4.04)
.084
(2.13)
.035
(.89)
M-0502-T
in.
(mm)
.181
(4.60)
.093
(2.36)
.032
(.81)
.185
(4.70)
.089
(2.26)
.035
(.89)
M-0603-T
in.
(mm)
.250
(6.35)
.110
(2.79)
.032
(.81)
.255
(6.47)
.105
(2.67)
.035
(.89)
M-0804-T
in.
(mm)
.310
(7.87)
.156
(3.96)
.032
(.81)
.315
(8.00)
.151
(3.83)
.035
(.89)
AL MH/1000 TURNS±15%
125µ
160µ
200µ
250µ
Path Length
Le (cm)
Cross Section
AE (cm2)
Volume
Ve (cm3)
8.4
11.6
9.6
11.7
14.9
12.6
10.8
14.8
12.3
15.0
19.1
16.2
13.5
18.7
15.4
18.7
24.0
20.2
16.9
23.4
19.3
23.4
30.0
25.3
.704
.806
.944
1.058
1.361
1.789
.0040
.0060
.0058
.0079
.0130
.0145
.0028
.0048
.0055
.0083
.0177
.0259
PART NO.
M0301-T***
M0302-T***
M0402-T***
M0502-T***
M0603-T***
M0804-T***
*** Add material code to part number, e.g., for 125µ the complete part number is M0502-T125
4-33
www.mag-inc.com
MPP THINZ DC Bias
TM
THINZTM are available in four permeabilities, 125µ,
160µ, 200µ, and 250µ. The most critical parameter
of a power inductor material is its ability to provide
inductance, or permeability, under DC bias.
The distributed air gap of MPP results in a soft
inductance versus DC bias curve. This swinging
inductance is often desirable since it improves
efficiency and accommodates a wide operating
range. With a fixed current requirement, the soft
H = .4
inductance versus DC bias curve provides added
protection against overload conditions. With a
variable current requirement a more efficient
inductor is achieved. The graph below shows the
reduction of permeability as a function of DC bias.
This graph is plotted on a semi-log scale to show the
DC bias characteristics at high DC magnetizing forces.
The following equation can be used to relate current
to magnetizing force, or H.
π N I/L
e
where:
H = DC Magnetizing force in Oersteds
N = number of turns
I = current in amps
Le = magnetic path length in cm2
0.9
12
0.8
5µ
16
0µ
0.7
20
0µ
0.6
Core Data
0.5
25
0µ
Per Unit of Initial Permeability
1.0
0.4
0.3
0.2
0.1
0.0
10
1
100
DC Magnetizing Force (Oersteds)
www.mag-inc.com
4-34
Hardware
TV-B2206-6A
Usable with toroids from 12.7mm (0.500”) through 22.2mm (0.875”)
C
E
A
D
B
H
J
G
Material
Phenolic
rated UL94V0
6 Pins
Bottom View
1
2
3
6
5
4
F
A
Nom.
1.0mm 19.0mm
CP wire 0.748”
B
Nom.
C
Nom.
D
Nom.
E
Ref.
F
Typ.
G
Typ.
H
Ref.
J
Ref.
5.5mm
0.216”
10.8mm
0.425”
3.5mm
0.138”
4.8mm
0.189”
6.0mm
0.236”
7.5mm
0.295”
2.0mm
0.079”
5.5mm
0.216”
TV-B2908-TA
Usable with toroids from 20.5mm (0.810”) through 31.8mm (1.250”)
C
E
A
Bottom View
B D
J
Phenolic
rated UL94V0
5-1
10 Pins
A
Nom.
1.0mm 27.0mm
CP wire 1.063”
2
3
4
5
10
9
8
7
6
H
F
G
Material
1
B
Nom.
C
Nom.
D
Nom.
7.5mm
0.295”
19.0mm
0.748”
5.0mm
0.197”
E
Ref.
F
Typ.
11.0mm 15.0mm
0.432”
0.590”
G
Typ.
H
Ref.
J
Ref.
5.0mm
0.197”
3.5mm
0.138”
8.13mm
0.320”
www.mag-inc.com
Hardware
TV-B3610-FA
Usable with toroids from 28.6mm (1.125”) through 38.1mm (1.500”)
C
E
A
Bottom View
B D
J
G2
Material
Phenolic
rated UL94V0
2
3
4
5
6
7
14
13
12
11
10
9
8
H
F
G1
14 Pins
1
A
Nom.
B
Nom.
1.0mm 35.8mm
CP wire 1.409”
C
Nom.
7.6mm 20.8mm
0.299” 0.819”
D
Nom.
E
Ref.
F
Typ.
G1
Typ.
5.0mm 12.3mm 16.0mm 5.0mm
0.197” 0.484” 0.630” 0.197”
G2
Typ.
6.3mm
0.248”
H
Ref.
J
Ref.
4.5mm 9.75mm
0.177” 0.384”
TV-H2206-4A
Usable with toroids from 12.7mm (0.500”) through 25.4mm (1.000”)
C
E
A
Top View
H
B
J
G
Material
4 Pins
A
Nom.
0.040” 19.0mm
CP wire 0.750”
B
Nom.
C
Nom.
E
Ref.
F
Typ.
3.9mm
0.155”
10.8mm
0.425”
9.8mm
0.385”
6.4mm
0.250”
www.mag-inc.com
G
Typ.
H
Typ.
15.2mm 3.3mm
0.600” 0.130”
J
Typ.
3.8mm
0.150”
5-2
Hardware
Nylon
rated UL94V0
F
Hardware
TV-H2507-4A
Usable with toroids from 20.5mm (0.810”) through 30.5mm (1.200”)
C
E
A
Top View
H
B
J
G
Material
F
4 Pins
Nylon
rated UL94V0
A
Nom.
CP wire 25.4mm
0.050” 1.000”
B
Nom.
C
Nom.
5.1mm
0.200”
E
Ref.
F
Typ.
G
Typ.
H
Typ.
15.2mm 13.0mm 10.2mm 20.33mm 2.3mm
0.600” 0.510” 0.400”
0.800” 0.090”
J
Typ.
5.1mm
0.200”
TV-H3813-4A
Usable with toroids from 25.4mm (1.000”) through 40.6mm (1.600”)
C
E
A
Top View
H
B
J
F
G
Material
Nylon
rated UL94V0
5-3
4 Pins
A
Nom.
CP wire 27.9mm
0.050” 1.100”
B
Nom.
5.1mm
0.200”
C
Nom.
E
Ref.
F
Typ.
G
Typ.
H
Typ.
20.3mm 18.0mm 15.2mm 22.9mm 2.3mm
0.800”
0.710”
0.600” 0.900” 0.090”
www.mag-inc.com
J
Typ.
5.1mm
0.200”
Hardware
TV-H4196-4A
Usable with toroids from 38.1mm (1.500”) through 63.5mm (2.500”)
C
E
A
Top View
H
B
J
G
Material
F
4 Pins
Nylon
rated UL94V0
A
Nom.
B
Nom.
CP wire 35.6mm
0.050” 1.400”
5.1mm
0.200”
C
Nom.
E
Ref.
F
Typ.
G
Typ.
H
Typ.
22.9mm 20.6mm 17.8mm 30.5mm 2.3mm
0.900”
0.810”
0.700”
1.200” 0.090”
J
Typ.
5.1mm
0.200”
TV-H6113-4A
Usable with toroids from 44.4mm (1.750”) through 71.1mm (2.800”)
C
E
A
Top View
H
B
J
G
Material
4 Pins
A
Nom.
CP wire 43.2mm
0.050” 1.700”
B
Nom.
5.1mm
0.200”
www.mag-inc.com
C
Nom.
E
Ref.
F
Typ.
G
Typ.
H
Typ.
27.9mm 25.7mm 22.9mm 38.1mm 2.3mm
1.100”
1.010”
0.900”
1.500” 0.090”
J
Typ.
5.1mm
0.200”
5-4
Hardware
Nylon
rated UL94V0
F
Kool Mµ® E Core Hardware
A horizontal mount printed circuit bobbin is available for each Kool Mµ E-core size. Plain or un-pinned, bobbins are
also available for most sizes. Refer to Magnetics Ferrite Cores catalog FC-601, section 11 for details.
The cores are standard industry sizes that will fit standard bobbins available from many sources. Core pieces can
be assembled by bonding the mating surfaces and taping around the perimeter of the core set.
Winding Area
Length Per Turn
Core Number
Bobbin Number
Number
of Pins
Winding
Area (cm2)
Winding
Area (in2)
Length per
Turn (cm)
Length per
Turn (ft)
K1808-E
(EI-187)
PC-B1808-81
8
0.316
0.049
4.05
0.133
K2510-E
(E-2425)
PC-B2510-T1
10
0.406
0.063
5.42
0.178
K3515-E
(EI-375)
PC-B3515-L1
12
0.948
0.147
7.34
0.241
K4020-E
(DIN 42/15)
PC-B4020-L1
12
1.94
0.300
9.14
0.300
K4022-E
(DIN 42/20)
PC-B4022-L1
12
1.94
0.300
10.21
0.335
K4317-E
(EI-21)
PC-B4317-L1
12
1.01
0.156
8.56
0.281
K5528-E
(DIN 55/21)
PC-B5528-WA
20
3.02
0.468
10.73
0.352
K5530-E
(DIN 55/25)
PC-B5530-FA
14
2.89
0.448
13.38
0.439
5-5
www.mag-inc.com
Notes
Hardware
www.mag-inc.com
Other Products From Magnetics
Ferrite Cores
Bobbin Cores
For telecommunications and high Q filter inductors, high
purity manganese-zinc ferrite pot cores exhibit low loss
characteristics and exceptionally low disaccommodation.
They are available with linear temperature characteristics
(-30°C to +70°C) in permeabilities of 750 and 2000, or flat
temperature characteristics (+20° to +70°C) in a 2300
permeability material. For transformer applications, the
inductance of ungapped pot cores in the above materials are
guaranteed to ±25%. For filters, cores can be gapped to
standard inductance factors guaranteed to ±3%. Twentythree physical sizes (3 x 2 mm to 45 x 29 mm) are stocked;
each size offers a variety of standard inductance values.
Miniature Tape Wound Bobbin Cores are manufactured
from Permalloy 80, Orthonol, and amorphous alloy 2714A
ultra-thin tape (0.000125” to 0.001” thick). They are available
in widths from 0.023” to 0.250” (wider on special request).
Wound on non-magnetic stainless steel bobbins, core
diameters are available down to 0.050”, with flux capacities
as low as several maxwells.
Toroids, E-cores, U-I cores, pot cores, and other shapes are
also available for high frequency inductor and power
transformers. For these applications, four low loss power
materials with permeabilities of 1500, 2300, 2500, and 3000
are available.
Many of these same shapes are also available in high
permeability materials of 5,000µ, 10,000µ, and 15,000µ for
EMI/RFI filters and broadband transformers.
For further information view Ferrite Cores Catalog (FC-601)
at www.mag-inc.com.
SHAPES: Pot cores, Toroids, E, I, U Cores, and Other
Shapes
APPLICATIONS: Inductors, Filters, Delay Lines,
Transformers, etc.
Tape Wound Cores
Tape Wound Cores are made from high permeability alloys
of nickel-iron, grain oriented silicon-iron, and cobalt-iron.
The alloys are known as Orthonol®, Alloy 48, Square
Permalloy 80, Round Permalloy, Supermalloy, Magnesil®,
Supermendur, and amorphous alloys. Cores are available in
all IEEE standard sizes and over 1,400 special sizes.
For a wide range of frequency applications, materials are
produced in thicknesses from 1/2 mil (0.013mm) through 14
mils (0.356mm). All core sizes can be provided in non-metallic
(phenolic or plastic), aluminum, or GVB (Guaranteed Voltage
Breakdown) coated aluminum boxes. Magnesil® material,
being less sensitive to external stresses, is also available
unboxed or epoxy encapsulated. Commonly used sizes are
in stock for immediate shipment.
MAGNETICS sophisticated pulse test equipment reproduces
most test programs and can measure accurately in the
millivolt-microsecond region. Standard sizes are available
from stock.
For further information view the Bobbin Core Catalog
(BCC-1.1) at www.mag-inc.com.
APPLICATIONS: Magnetometers, Flux Gates, High
Frequency Counters, Timers, Oscillators, Inverters,
Magnetic Amplifiers.
Cut Cores
SUPERMENDUR C-cores and E-cores are used in power
transformers at frequencies up to 1500 Hz where minimum
weight and size are required.
PERMALLOY 80 C-cores are ideal for the output transformer
of high frequency, high power inverters. The low core loss
of these cores makes them suitable up to 5000 gauss, at
frequencies up to 25 kHz. Other uses: high power pulse
transformers, high frequency inductors, and low loss current
transformers.
ORTHONOL® C-cores have a saturation flux density of 15,000
gauss, and a core loss approximately one-half that of a
silicon-iron C-core of the same material thickness. These
cores are suitable for power transformers operating at flux
densities to 10,000 gauss, and frequencies to 8 kHz.
Amorphous alloy cores offer low losses up to 100 kHz at flux
densities comparable to 50 Ni / 50 Fe cores. These alloys are
attractive for magnetic core devices where ruggedness and
low weight are important.
For further information view the Cut Core Catalog (MCC-100)
at www.mag-inc.com.
For further information view the Tape Wound Core Catalog
(TWC-500) www.mag-inc.com.
APPLICATIONS: Magnetic Amplifiers, Converters,
Inverters, Reactors, Regulators, Static Magnetic Devices
www.mag-inc.com
w w w . m a g - i n c . c o m
Website Enhanced
The newly redesigned MAGENTICS website contains a wealth of easy to access information
on soft magnetic cores and materials. Some of the most important features of the new
website are:
● The MAGNETICS Digital Library contains all of the company’s technical bulletins, white
papers, and design manuals, which can be viewed on-screen or downloaded.
● The Software section of the website provides access to the MAGNETICS software
design aids for designing Common Mode Filters, Current Transformers, Inductors,
and MagAmps.
● All of the product specifications for ferrite cores, powder cores, strip wound products,
and specialty metals can be quickly found by using the menu driven product locator.
● The Contact Application Engineering page allows users to quickly contact our
Application Engineering staff for assistance.
● The News section of the website keeps users up to date on the latest product
introductions and developments.
CD Now Available
MAGNETICS has just developed an interactive CD that contains all of the company’s publicly
available design manuals, technical literature, and design software. The CD is a small 3-inch
format for easy portability and is PC and Mac compatible. It allows the user to view, print,
and run the software design aids directly from the CD. This CD is free and available from
MAGNETICS or any of the company’s distributors or agents. To request a free CD, visit the
MAGNETICS website at www.mag-inc.com.
®
HOME OFFICE AND FACTORY
P.O. Box 11422
Pittsburgh, PA 15238-0422
PHONE: 1.800.245.3984
FAX: 412.696.0333
w w w . m a g - i n c . c o m
magnetics@spang.com
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