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
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
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
MF
general purpose metal film leaded resistor
dimensions and construction
Ceramic Core
d
D
Marking Resistive
Film
Insulation Coating
Trimming Line
End
Cap Lead
Wire
L l
C
L (ref.)
MF1/4 .248
(6.3)
.280
(7.1)
.091±.012
(2.3±0.3)
.024±.002
(0.6±0.05) 1.18±.118
(30.0±3.0)
.031±.002
(0.8±0.05)
.138±.016
(3.5±0.4)
.437
(11.1)
.374
(9.5)
MF1/2
Type C (max.) D d l
Dimensions inches (mm)
1/4: T26, T52, VT, VTP,
VTE, M Forming
1/2: T52, M Forming
ordering information
ML07, ML20
2 significant
figures + 1
multiplier
“R” indicates
decimal on
value <10Ω
1/4: 250mW
1/2: 500mW
L: SnPb
C: SnCu
G: ±2%
J: ±5%
MF 1/4
J
L
Type Tolerance
Termination
Material
Type Power
Rating
Nominal
Resistance Tolerance
Resistance
Taping and Forming
Packaging
Old Part #
New Part #
R20 T52
T52 R20
A: Ammo
R: Reel
Packaging
R J
For further information on packaging,
please refer to Appendix C.
leaded
resistors
L: 200
ppm/C°
T.C.R.
L
179
KOA Speer Electronics, Inc. • Bolivar Drive • P.O. Box 547 • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
MF
general purpose metal film leaded resistor
Absolute
Maximum
Overload
Voltage
Resistance
Range
E-24
(G±2%, J±5%)
Absolute
Maximum
Working
Voltage
Part
Designation
Operating
Temperature
Range
Power
Rating
@ 70°C
applications and ratings
Minimum
Dielectric
Withstanding
Voltage
T.C.R.
(ppm/°C)
Max.
MF1/4
MF1/2
250mW
500mW
500V
700V 200 500V
700V
250V
350V
0.20Ω- 33MΩ
0.33Ω- 51MΩ
-55°C
to
+155°C
Performance Characteristics
Derating Curve Surface Temperature Rise
environmental applications
% Rated Power
100
80
60
40
20
-60 -40 0 40 60 80 100 160
70
20
Ambient Temperature
(°C)
0
-55
120
155
-20 140
Temperature Rise (°C)
90
75
60
45
30
0255075
% Rated Power
0100
15
MF1/4, MF1/2
Parameter Requirement
Short Time Overload
Temperature Coefficient
Moisture Resistance
Resistance to Solder Heat
Failure Rate
Load Life
Temperature Cycling
Vibration
Terminal Strength
Shock
Voltage Coefficient
Current Noise
Low Temperature Operation
±(0.30% + 0.05Ω)
±200ppm/°C
±1.5%
±(0.20% + 0.05Ω)
<10-5 %/1000 hours
±(0.50% + 0.05Ω)
±(0.20% + 0.05Ω)
5 # Minimum
<20ppm/v
<1.0µv/v/decade
±(0.30% + 0.05Ω)
leaded
resistors
