Carbon Film Mini SeriesResistors
SEI
Type CFM
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Ideal Substitute Where Size Restrictions Apply
1
General Purpose Type
High Stability Performance
Uniformity of All Electrical Parameters
Ideal for Commercial/Industrial Applications
Auto Sequencing/Insertion Compatible
Flame Retardant Coatings Standard
Beige Body Color
PERFORMANCE CHARACTERISTICS (TESTED PER MIL-STD-202)
ELECTRICAL
Power Rating (Watts)
Derated to 0 Load at
Maximum Working Voltage
Operating Temperature Range
Resistance Range (±5%)
3
Dielectric Withstand Voltage
Maximum Pulse Voltage
Insulation Resistance
CFM 1/4
1/4 @70°C
155°C
250V
-55°C to +155°C
1Ω – 4.7 meg
4
500 volts RMS min.
600V
10,000 meg min.
<100K ±(3%+0.05Ω)
≥100K ±(5%+0.05Ω)
±0.5%
<100K ±(2%+0.05Ω)
≥100K ±(3%+0.05Ω)
±0.2%
±0.5%
±0.5%
-10 ppm/V min.
±(0.75%+0.05Ω)
CFM 1/2
1/2 @70°C
155°C
350V
-55°C to +150°C
1Ω – 4.7 meg
4
500 volts RMS min.
700V
10,000 meg min.
<100K ±(3%+0.05Ω)
≥100K ±(5%+0.05Ω)
±0.5%
<100K ±(2%+0.05Ω)
≥100K ±(3%+0.05Ω)
±0.2%
±0.5%
±0.5%
-10 ppm/V min.
±(0.75%+0.05Ω)
ENVIRONMENTAL
Moisture Resistance
Thermal Shock
Load Life @ 70°C — 1,000
hrs
Shock and Vibration
Resistance to Soldering Heat
Terminal Strength
Voltage Coefficient
Short Time Overload
DIMENSIONS:
FEATURE
A – Lead Length (typ.)
B – Body Length
C – Lead Diameter
D – Body Diameter
1.10
Inches (mm)
CFM 1/2
1.10
CFM 1/4
±
.08
(28.0
±
2.0)
.13 +.01/-0 (3.2 +0.2/-0)
.018
.07
±
.001 (0.45
±
0.02)
±
.01 (1.9
±
0.1)
±
.08 (28.0
±
2.0)
.24
±
.01 (6.0
±
0.3)
.022
±
.001 (0.55
±
0.03)
.09
±
.01 (2.3
±
0.2)
ORDERING INFORMATION
CFM
1/4
1K
5%
NOTES
1. 1/2W rating in 1/4W package size and 1/4W rating in 1/8W size.
2. Cut and formed leads available (see Section E).
3.
±2%
tolerance available (10Ω - 1meg).
4. 5.1 meg to 22 meg also available.
Type
Wattage
Resistance
Tolerance
SEI Electronics Inc.
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Formerly Stackpole Electronics Inc.
P.O. Box 58789
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Raleigh, NC 27658-8789
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Telephone: (919) 850-9500
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FAX: (919) 850-9504
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