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
Trimming Line
Ceramic Core
d
l
Type
MF1/4
MF1/2
L (ref.)
.248
(6.3)
.374
(9.5)
Dimensions
inches
(mm)
C (max.)
D
d
.280
(7.1)
.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)
Marking
Resistive
Film
End
Cap
Lead
Wire
Insulation Coating
C
leaded
resistors
ordering information
Old Part #
ML07, ML20
Type
New Part #
MF
Type
R20
Resistance
1/4
Power
Rating
1/4: 250mW
1/2: 500mW
L
T.C.R.
L: 200
ppm/C°
J
Tolerance
L
Termination
Material
L: SnPb
C: SnCu
T52
Packaging
T52
Taping and Forming
1/4: T26, T52, VT, VTP,
VTE, M Forming
1/2: T52, M Forming
R
Packaging
A: Ammo
R: Reel
R20
Nominal
Resistance
2 significant
figures + 1
multiplier
“R” indicates
decimal on
value <10Ω
J
Tolerance
G: ±2%
J: ±5%
For further information on packaging,
please refer to Appendix C.
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 Box 547 • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
.O.
MF
general purpose metal film leaded resistor
applications and ratings
Part
Designation
MF1/4
MF1/2
Power
Rating
@ 70°C
250mW
500mW
Minimum
Dielectric
Withstanding
Voltage
500V
700V
T.C.R.
(ppm/°C)
Max.
200
Resistance
Range
E-24
(G±2%, J±5%)
0.20Ω - 33MΩ
0.33Ω - 51MΩ
Absolute
Maximum
Working
Voltage
250V
350V
Absolute
Maximum
Overload
Voltage
500V
700V
Operating
Temperature
Range
-55°C
to
+155°C
environmental applications
Derating Curve
100
80
% Rated Power
60
40
20
0
-60 -40 -20
-55
Temperature Rise (°C)
Surface Temperature Rise
90
75
60
45
30
15
0
0
25
50
75
100
MF1/4, MF1/2
0
20
40
60
80 100 120 140
70
Ambient Temperature
(°C)
160
155
% Rated Power
Performance Characteristics
Parameter
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
±200ppm/°C
±(0.30% + 0.05Ω)
±(0.20% + 0.05Ω)
±1.5%
leaded
resistors
Requirement
<10
-5
%/1000 hours
±(0.50% + 0.05Ω)
±(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 Box 547 • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
.O.
179
