features
•Units meet or exceed the requirements of MIL-R-10509
•Suitable for automatic machine insertion
•Marking: Blue-gray body color with color-coded bands
180 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
precision 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)
.138±.016
(3.5±0.4)
.437
(11.1)
.374
(9.5)
MF1/2
.031±.002
(0.8±0.05)
1.50±.126
(38.1±3.2)
.217±.02
(5.5±0.5)
.721
(18.3)
.610
(15.5)
MF1
Type C (max.) D d l
Dimensions inches (mm)
1/4: T26,
T52, VT, VTP,
VTE, M10,
M25, U
1/2: T52,
M12.5, M15
1: T521
ordering information
MF55, MF60, MF65
3 significant
figures + 1
multiplier
“R” indicates
decimal on
value <10Ω
1/4: 0.25W
1/2: 0.5W
1: 1W
E: ±25
C: ±50
D: ±100
L: SnPb
C: SnCu
B: ±0.1%
C: ±0.25%
D: ±0.5%
F: ±1.0%
MF 1/4
1002
D L
Type Resistance
F
Tolerance
T.C.R.Type Power
Rating
Nominal
Resistance Tolerance
T.C.R.
Termination
Material
Taping and
Forming
Packaging
Old Part #
New Part #
DT52
T52 1002
A: Ammo
R: Reel
Packaging
R F
For further information on packaging,
please refer to Appendix C.
leaded
resistors
181
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
precision metal film leaded resistor
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)
70
50
40
30
20
0255075
% Rated Power
0100
10
MF1/4
60
MF1/2
MF1
Absolute
Maximum
Overload
Voltage
Absolute
Maximum
Working
Voltage
Part
Designation
Power
Rating
@ 70°C
applications and ratings
Minimum
Dielectric
Withstanding
Voltage
MF1/4D
MF1/4C
MF1/4E
MF1/2D
MF1/2C
MF1/2E
MF1D
MF1C
MF1E
0.25W
0.50W
1W
24.3Ω- 750KΩ24.3Ω- 1.0MΩ
10Ω- 5.9MΩ
30.1Ω- 1.0MΩ
10Ω- 10MΩ
47.5Ω- 2.0MΩ
10Ω- 5.11MΩ
47.5Ω- 4.64MΩ47.5Ω- 5.11MΩ
1.0Ω- 6.81MΩ
47.5Ω- 2.0MΩ
1.0Ω- 5.6MΩ
1.0Ω- 33.2MΩ
30.1Ω- 1.0MΩ
1.0Ω- 2.21MΩ
1.0Ω- 22.1MΩ
30.1Ω- 750KΩ30.1Ω- 1.0MΩ
47.5Ω- 1.0MΩ47.5Ω- 1.5MΩ
47.5Ω- 1.0MΩ47.5Ω- 2.49MΩ
47.5Ω- 2.0MΩ7.5Ω- 2.49MΩ
——
——
E: ±25
C: ±50
D: ±100
E: ±25
C: ±50
D: ±100
E: ±25
C: ±50
D: ±100
700V
500V 250V
350V
500V
700V
T.C.R.
(ppm/°C)
Resistance
T.C.R.
25°C
+25°C/-55°C and +25°C/+125°C
Within regulated tolerance
Within specified T.C.R.
—
Performance Characteristics
Parameter
Requirement ∆R ±(% + 0.05Ω)
Limit Typical Test Method
Overload Rated voltage x 2.5 or maximum overload voltage
for 5 seconds, whichever is less
0.5 0.3
0.25
Resistance to Solder Heat 260°C ± 5°C for 10 seconds ± 1 second
0.3
0.75
Rapid Change of Temperature -55°C (30 minutes)/+155°C (30 minutes), 5 cycles
Moisture Resistance
Endurance @ 70°C
40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hour ON,
0.5 hr OFF cycle
70°C ± 2°C, 1000 hours, 1.5 hour ON, 0.5 hr OFF cycle
1.0
0.5
High Temperature Exposure +125°C, 100 hours
leaded
resistors
Resistance Range
E-96
(B±0.1%) (C±0.25%) (D±0.5%) (F±1.0%)
Operating
Temperature
Range
-55°C
to
+155°C
