Semi-Precision Power
Resistors
Semi-Precision
Power
Wirewound Resistor
Wirewound Resistor
Semi-Precision
Power
WelwynMake
Components
Possible
Welwyn Components
AS Series
Wirewound
Resistor
• 0.25 to 10 watts
AS Series
• Tolerance down to ±0.5%
• 0.25
to 10 watts
(N)AS
Series
• 0.1 ohm to 175K ohms
• Tolerance down to ±0.5%
0.25 to•10
watts
Resistance
wire TCR ±20 ppm/°C
• 0.1
ohm
to
175K
ohms
Tolerance down to ±0.5%
• Resistance
wireohms
TCR ±20 ppm/°C
0.1 ohm to 175K
Resistance wire TCR ±20 ppm/°C
Non inductive (NAS) option
Pb-free option is RoHS compliant
All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2)
Electrical Data
Equivalent
Power Rating
Commercial Range
Non-Inductive Range
Available Resistance
(watts)
(ohms)
(ohms)
(ohms)
Type
Style
125°C
25°C
Min.
Max.
Min.
Max.
0.5%, 1%
3%, 5%
Equivalent
Power Rating
Commercial Range
Non-Inductive Range
Available Resistance
1/4
(N)AS0R1-1K0
60R
0R2
1K0
1
0R1
RW81
0.25
1R0-1K0
MIL-R-26
(watts)
(ohms)
(ohms)
(ohms)
1/2
(N)AS60R
0R5
6K0Min.
1 Min.
0R1
0.525°C
Style
125°C
Max.
Max.
0.5%, 1% 1R0-6K0
3%, 5% 0R1-6K0
(N)AS-1
3K8
0R2
7K5
2
0R1
1
1R0-7K5
RW70U
0R1-1K0 0R1-7K5
60R
0R2
1K0
1
0R1
RW81
0.25
1R0-1K0
(N)AS-1C
1K0
10R
2K0
2
R05
1
1R0-2K0
0R1-6K0 R05-2K0
60R
0R5
6K0
1
0R1
0.5
1R0-6K0
MIL-R-26
Electrical Data
Type
(N)AS-1/4
(N)AS-1/2
(N)AS-2
RW70U
(N)AS-1C (N)AS-2B
RW79U
(N)AS-2 (N)AS-2C
(N)AS-3
(N)AS-2B
(N)AS-1
(N)AS-2C (N)AS-5
(N)AS-3 (N)AS-7
(N)AS-10
RW74U
(N)AS-5
RW79U1
1
2
3
RW74U2
3
RW78U5
7
(N)AS-7
Physical Data
(N)AS-10
RW78U
10
2 2
3 2
3 0R1
4 R05
0R17K5
0R12K0
20K0R2
24K10R
R253K8
0R11K0
10K
1R0-7K5
12K
1R0-2K0
1R0-20K
0R1-7K5
1R0-24K
R05-2K0
0R1-20K
2 3
3 4
3 0R1
5 0R1
0R120K
0R124K
18KR25
30K0R1
0R210K
0R112K
7K5
1R0-20K
15K
1R0-24K
1R0-18K
0R1-20K
1R0-30K
0R1-24K
0R1-18K
5 3
7 5
7 0R1
9 0R1
0R118K
0R130K
60K0R2
90K0R1
0R17K5
0R215K
30K
1R0-18K
45K
1R0-30K
1R0-60K
0R1-18K
1R0-90K
0R1-30K
0R1-60K
10 7
14 0R1
0R160K
175K
0R1
0R230K
50K
0R1-60K
1R0-60K 1R0-175K
9
0R1
90K
0R2
45K
1R0-90K
0R1-90K
14
0R1
175K
0R2
50K
1R0-175K
0R1-175K
0R1-24K
0R1-30K
0R1-90K
0R1-175K
Dimensions Inches (mm)
Physical
Type Data
A ±0.032 (0.81)
1/4
(N)AS0.250(6.4)
Dimensions
Inches
(mm)
1/2
(N)AS0.312(7.9)
Type
B (max)
A ±0.032 (0.81)
B (max)
C (max)
0.094 (2.4) 0.312 (7.9)
D (nom)
E (min)
0.020 (0.5)
1.50 (38.1)
0.094
(2.4) 0.375
(min) 1.50 (38.1)
D (9.5)
(nom) 0.020E (0.5)
C (max)
(N)AS-1
0.020
(0.5)
0.429
(10.9)
0.125
(3.2)
0.367(9.3)
0.094 (2.4) 0.312 (7.9) 0.020 (0.5) 1.50 (38.1) 1.50 (38.1)
0.250(6.4)
(N)AS-1C
1
(0.64)
(7.7)
(2.9)
0.256(6.5)
(N)AS- /2
1.50
(38.1) 1.50 (38.1)
0.020
(0.5)0.025
0.375
(9.5) 0.303
0.094 (2.4) 0.115
0.312(7.9)
(N)AS-2
0.032
(0.8)
0.600
(15.2)
0.250
(6.3)
0.480(12.2)
(N)AS-1
0.125 (3.2) 0.429 (10.9) 0.020 (0.5) 1.50 (38.1) 1.50 (38.1)
0.367(9.3)
(N)AS-2B
(16.6)
(5.6)
(N)AS-1C
1.50(0.8)
(38.1) 1.30 (33.0)
0.025
(0.64) 0.032
0.303
(7.7)0.663
0.115 (2.9) 0.219
0.256(6.5) 0.540(13.7)
(N)AS- 1/4
(N)AS-2C
(15.1)
1.50(0.8)
(38.1) 1.30D(33.0)
0.032
(0.8) 0.032
0.600(4.0)
(15.2)0.594
0.250 (6.3) 0.157
0.480(12.2)0.489(11.0)
(20.6)
(N)AS-2B (N)AS-3
1.30(1.0)
(33.0) 1.50 (38.1)
0.032
(0.8) 0.040
0.663(7.2)
(16.6)0.812
0.219 (5.6) 0.282
0.540(13.7)0.687(17.5)
(24.9)
(N)AS-2C (N)AS-5
1.30(1.0)
(33.0) 1.50 (38.1)
0.032
(0.8) 0.040
0.594(8.8)
(15.1)0.980
0.157 (4.0) 0.344
0.489(11.0)0.875(22.2)
E
D
E
A
B
A
(N)AS-2
(N)AS-3
(N)AS-5
C
B
C
(N)AS-7
(35.0)
1.50(1.0)
(38.1) 1.50 (38.1)
0.040
(1.0) 0.040
0.812(8.8)
(20.6)1.375
0.282 (7.2) 0.344
0.687(17.5)1.250(31.8)
(N)AS-10
0.040
(1.0)
1.937
(49.2)
0.385
(9.8)
1.812(46.0)
0.344 (8.8) 0.980 (24.9) 0.040 (1.0) 1.50 (38.1) 1.50 (38.1)
0.875(22.2)
(N)AS-7
1.250(31.8)
0.344 (8.8) 1.375 (35.0)
0.040 (1.0)
1.50 (38.1)
(N)AS-10
1.812(46.0)
0.385 (9.8) 1.937 (49.2)
0.040 (1.0)
1.50 (38.1)
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
GeneralNote
Note
General
© Welwyn
Limited
Northumberland
7AA,
UK
Welwyn Components
reservesComponents
the right to make
changes ·inBedlington,
product specification
withoutNE22
notice
or liability.
TT Electronics reserves
the right
to
in product
specification
without
notice or liability.
+44
(0)make
1670changes
822181
Facsimile:
+44 (0)accurate
1670
829465
info@welwyn-tt.com
· Website: www.welwyn-tt.com
All informationTelephone:
is subject to
Welwyn’s
own
data ·and
is considered
at time· Email:
of going
to print.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
©
TT Electronics
Telephone:
+44 (0) plc
1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
A subsidiary of
TT electronics plc
A subsidiary ofIssue D · 03.06
TT
electronics plc
www.ttelectronicsresistors.com
Issue D · 03.06
02.16
91
9
Semi-Precision Power
Wirewound Resistor
Make Possible
Semi-Precision Power
Semi-Precision
Power
(N)AS
Series
Wirewound Resistor
Wirewound Resistor
AS Series
AS Series
Performance
Welwyn Components
Welwyn Components
Data
Power Derating
Power Derating
150
150
AS-1/4, 1/2, 1, 1C
AS-1/4, 1/2, 1, 1C
AS-3, 2
AS-3, 2
AS-2C
AS-2C
AS-5, 10
125
125 AS-2B
AS-2B
100
100
250
Spot
Temperature
HotHot
Spot
Temperature
(C) (C)
175
175
275
275
250
AS-5, 10
AS-7
AS-7
75
75
0
025
25
75
75
125
175
125
175(C)
Ambient
Temperature
Ambient Temperature (C)
225
225
275
275
Temperature Rise @ 125°C
Temperature Rise @ 125°C
Spot
Temperature
HotHot
Spot
Temperature
( (°C) °C)
275
275
250
250
AS-7, 10
AS-7, 10
AS-3, AS-5
AS-3, AS-5
AS-2C
AS-2C
AS-1,2
AS-1,2
AS-2B
AS-2B
200
200
AS-1C
AS-1C
AS-1/2
AS-1/2
AS-1/4
AS-1/4
150
150
125
1250
0
200
200
150
150
AS-7, 10
AS-7, 10
AS-1,2
AS-1,2
AS-3, AS-5
AS-3, AS-5
AS-1/2
AS-1/2
100
100
50
50
25
25
0
0
AS-1C
AS-1C
AS-2B
AS-2B
AS-2C
AS-2C
AS-1/4
AS-1/4
40
80
120
40 Percent of
8025C Power120
Rating
Percent of 25C Power Rating
160
160
200
200
Selected Pulse-Handling Capability @ 125°C
Selected Pulse-Handling Capability @ 125°C
Energy
(watts-second)
Energy
(watts-second)
Percent
of 125C
Power
Rating
Percent
of 125C
Power
Rating
200
200
Temperature Rise @ 25°C
Temperature Rise @ 25°C
14
14
12
12
10
10
8
8
200
200
AS-2B
AS-2B
6
6
AS-2C
AS-2C
4
4
2
2
40
80
120
160
40Percent of80
120 Rating 160
125 °C Power
Percent of 125 °C Power Rating
AS-3
AS-3
AS-2
AS-2
0
00.1
0.1
AS-1/2
AS-1/2
AS-1/4
AS-1
AS-1
AS-1/4
0.2
0.2
Environmental
Testing Testing
at 25°C
Environmental
Environmental Testing at 25°C
0.5
1
2
0.5Resistance
1 (ohms) 2
Resistance (ohms)
Test Condition
Test Condition
Load
Life 1000 hours
Max ∆R
Max
1.0%∆R
Load LifeResistance
1000 hours
Moisture
Moisture
Resistance
Temperature Cycle
1.0%
1.0%
1.0%
0.5%
Temperature
Cycle
Short
Time Overload
Short
Time
Overload
Low Temperature Operation
0.5%
0.5%
0.5%
0.5%
Low Temperature
Operation
Solder
Heat
Solder Heat
Shock
0.5%
0.25%
0.25%
0.5%
Shock
Vibration
Vibration
0.5%
0.5%
0.5%
5
5
10
10
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
www.ttelectronicsresistors.com
© TT Electronics plc
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
02.16
Issue D · 03.06
Semi-Precision Power
Wirewound Resistor
Make Possible
(N)AS Series
Ordering
Procedure
Ordering Procedure
This product has two valid part numbers:
European (Welwyn) Part Number: AS3-27KFI (AS3, 27 kilohms ±1%, Pb-free)
A
1
S
3
-
2
7
2
K
3
F
I
4
5
1
2
3
4
5
Winding
Type
Value
Tolerance
Termination & Packing
Omit for
standard
N = noninductive
I = Pb-free, Standard packing bulk*
AS1/4, AS1/2
E24 = 3/4 D = ±0.5%
F = ±1% AS1/4, 1/2, 1, 1C, 2,
characters
AS1, AS1C
1000/box
R = ohms
AS2, AS2B
H = ±3% 2B, 2C, 3, 5
K = kilohms
AS2C, AS3
500/box
J = ±5% AS7, 10
AS5, AS7, AS10
* Tape and reel available on request
USA (IRC) Part Number: AS32702FLF (AS3, 27 kilohms ±1%, Pb-free)
A
1
S
3
2
2
7
0
2
F
3
4
L
F
5
1
2
3
4
Winding
Type
Value
Tolerance
Omit for
standard
N = noninductive
3 digits +
AS1/4, AS1/2
multiplier
AS1, AS1C
AS2, AS2B
R = ohms for
AS2C, AS3
values <100
AS5, AS7, AS10
ohms
D = ±0.5%
F = ±1%
H = ±3%
J = ±5%
5
Termination & Packing
LF=Pb-free, Omit for SnPb
Standard packing bulk*
AS1/4, 1/2, 1, 1C, 2, 2B
1000/box
2C, 3, 5
AS7, 10
500/box
* Tape and reel available on request
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
www.ttelectronicsresistors.com
© TT Electronics plc
02.16