MF
general purpose metal film leaded resistor
features
•
•
•
•
Semi-precision metal film resistors
Meets requirements of MIL-R-22684
Suitable for automatic machine insertion
Marking: Blue-gray body color with color-coded bands
dimensions and construction
L
D
l
Trimming Line
Ceramic Core
d
Marking
Resistive
Film
End
Cap
Dimensions inches (mm)
C (max.)
D
d
Type
L (ref.)
MF1/4
.248
(6.3)
.280
(7.1)
MF1/2
.374
(9.5)
.437
(11.1)
l
.091±.012 .024±.002
(2.3±0.3) (0.6±0.05) 1.18±.118
.138±.016 .031±.002 (30.0±3.0)
(3.5±0.4) (0.8±0.05)
Lead
Wire
Insulation Coating
C
leaded
resistors
ordering information
Old Part #
New Part #
ML07, ML20
R20
J
T52
Type
Resistance
Tolerance
Packaging
MF
1/4
L
T52
R
Taping and Forming
Packaging
1/4: T26, T52, VT, VTP,
VTE, M Forming
1/2: T52, M Forming
A: Ammo
R: Reel
Type
Power
Rating
1/4: 250mW
1/2: 500mW
For further information on packaging,
please refer to Appendix C.
L
T.C.R.
L: 200
ppm/C°
Termination
Material
L: SnPb
C: SnCu
R20
Nominal
Resistance
2 significant
figures + 1
multiplier
“R” indicates
decimal on
value <10Ω
J
Tolerance
G: ±2%
J: ±5%
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
178
KOA Speer Electronics, Inc. • Bolivar Drive • P.O. Box 547 • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
MF
general purpose metal film leaded resistor
applications and ratings
Part
Designation
Power
Rating
@ 70°C
Minimum
Dielectric
Withstanding
Voltage
MF1/4
250mW
500V
MF1/2
500mW
700V
T.C.R.
(ppm/°C)
Max.
200
Resistance
Range
E-24
(G±2%, J±5%)
Absolute
Maximum
Working
Voltage
Absolute
Maximum
Overload
Voltage
0.20Ω - 33MΩ
250V
500V
0.33Ω - 51MΩ
350V
700V
Operating
Temperature
Range
-55°C
to
+155°C
environmental applications
Derating Curve
Surface Temperature Rise
80
75
Temperature Rise (°C)
90
% Rated Power
100
60
40
20
0
-60 -40 -20
-55
0
20
80 100 120 140 160
70
155
Ambient Temperature
(°C)
40
60
MF1/4, MF1/2
60
45
30
15
0
0
25
50
75
100
% Rated Power
Performance Characteristics
Parameter
Requirement
±200ppm/°C
±(0.30% + 0.05Ω)
±(0.20% + 0.05Ω)
±1.5%
<10 -5 %/1000 hours
±(0.50% + 0.05Ω)
leaded
resistors
Temperature Coefficient
Short Time Overload
Resistance to Solder Heat
Moisture Resistance
Load Life
Failure Rate
Temperature Cycling
Vibration
Shock
Terminal Strength
Current Noise
Voltage Coefficient
Low Temperature Operation
±(0.20% + 0.05Ω)
5 # Minimum
<1.0µv/v/decade
<20ppm/v
±(0.30% + 0.05Ω)
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
KOA Speer Electronics, Inc. • Bolivar Drive • P.O. Box 547 • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
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