CF / CFM Series
Carbon Film Resistors
Features:
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Stackpole Electronics, Inc.
Resistive Product Solutions
General purpose resistor ideal for commercial/industrial
applications
Flame retardant coatings standard
Flameproof version available as CFF
Panasert available on selected sizes; contact factory
Auto sequencing/insertion compatible
CFM (mini) ideal choice when size constraints apply
Cut and formed product is available on select sizes; contact
factory
Standard lead wire for CF/CFM is copper plated steel, with
100% tin over plate
100% tin plate on copper wire is available as type
CFQ/CFQM
RoHS compliant / lead-free
Electrical Specifications
Type / Code
CF 1/8
CF 1/4
CF 1/2
CF 1
CF 2
CFM 1/4
CFM 1/2
CFM 1
Power Rating
(Watts) @ 70ºC
0.125W
0.250W
0.500W
1.000W
2.000W
0.250W
0.500W
1.000W
Maximum Working
Voltage
1
250V
350V
350V
500V
500V
250V
350V
600V
Maximum Overload Dielectric Withstanding
Voltage
Voltage
500V
600V
700V
1,000V
1,000V
500V
600V
1,000V
350V
350V
600V
600V
600V
350V
350V
600V
Ohmic Range and Tolerance
2%
10Ω - 1MΩ
1Ω - 1MΩ
10Ω - 1MΩ
1Ω - 1MΩ
10Ω - 1MΩ
10Ω - 1MΩ
10Ω - 1MΩ
10Ω - 1MΩ
5%
1Ω - 22MΩ
1Ω - 22MΩ
1Ω - 10MΩ
1Ω - 10MΩ
1Ω - 10MΩ
1Ω - 10MΩ
1Ω - 10MΩ
1Ω - 10MΩ
1
Lesser of
√PR
or maximum working voltage.
How to Order
SEI Type
Code
Nominal
Resistance
Tolerance
Packaging
CF
Code
Description
CF
Standard
CFF
Flameproof
CFM
Mini
PCF
Panasert CF 1/4
PCFM
Panasert CF 1/2
CFQ Tin plating on copper wire
CFQM
Tin plating (mini)
Code
1/8
1/4
1/2
1
2
1/2
Wattage
0.125W
0.250W
0.500W
1.000W
2.000W
100K
5%
Tolerance
2%
5%
R
SEI Types
CF 1/8
CF 1/4
CF 1/2
CF 1
CF 2
CFM 1/4
CFM 1/2
CFM 1
PCF 1/4
PCFM 1/2
Tape &
Reel
5,000
2,000
1,000
5,000
N/A
1,000
A
Bulk
R
Q
Panasert &
Tape & Box Panasert &
Box
(Ammo Box)
Reel
(Ammo Box)
5,000
2,000
1,000
5,000
5,000
2,000
N/A
N/A
T
P
Rev Date: 12/14/2009
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
65
www.seielect.com
marketing@seielect.com
CF / CFM Series
Carbon Film Resistors
Stackpole Electronics, Inc.
Resistive Product Solutions
Mechanical Specifications
Type / Code
CF 1/8
CF 1/4
CF 1/2
CF 1
CF 2
CFM 1/4
CFM 1/2
CFM 1
A
Body Length
0.13 ± 0.01
3.3 ± 0.3
0.26 ± 0.02
6.5 ± 0.05
0.33 ± 0.04
8.5 ± 1
0.43 ± 0.04
11.0 ± 1
0.59 ± 0.04
15 ± 1
0.13 ± 0.01
3.3 ± 0.3
0.26 ± 0.04
6.5 ± 1
0.35 ± 0.02
9.0 ± 0.5
B
Body Diameter
0.07 ± 0.01
1.7 ± 0.3
0.09 ± 0.01
2.3 ± 0.3
0.11 ± 0.02
2.7 ± 0.5
0.18 ± 0.02
4.5 ± 0.5
0.20 ± 0.02
5 ± 0.5
0.07 ± 0.01
1.7 ± 0.3
0.09 ± 0.01
2.3 ± 0.3
0.14 ± 0.02
3.5 ± 0.5
C
Lead Length(Bulk)
1.10 ± 0.12
28 ± 3
1.10 ± 0.12
28 ± 3
1.18 ± 0.12
30.0 ± 3
1.18 ± 0.12
30.0 ± 3
1.18 ± 0.12
30 ± 3
1.10 ± 0.12
28 ± 3
1.10 ± 0.12
28 ± 3
1.10 ± 0.12
28 ± 3
D
Lead Diameter
0.018 ± 0.003
0.45 ± 0.08
0.022 ± 0.003
0.55 ± 0.08
0.022 ± 0.002
0.56 ± 0.05
0.028 ± 0.004
0.70 ± 0.1
0.031 ± 0.004
0.8 ± 0.1
0.018 ± 0.003
0.45 ± 0.08
0.022 ± 0.003
0.55 ± 0.08
0.024 ± 0.002
0.6 ± 0.05
Units
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
Performance Characteristics
Test
Short Time Overload
Resistance to Solder Heat
Dielectric Withstanding Voltage
Load Life
Terminal Strength
Moisture Resistance
Operating Temperature Range: -55°C to +155°C
Standard / Method
EIA-RS-172-B 3.2.6
MIL-STD 202 Method 210
JIS C 5202 5.6
MIL-STD 202 Method 108
MIL-STD 202 Method 211
MIL-STD 202 Method 106
Test Results
± 0.5%
± 0.5%
± 0.5%
± 1%
± 0.2%
± 0.5%
Rev Date: 12/14/2009
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
66
www.seielect.com
marketing@seielect.com
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