CF / CFM Series — Carbon Film Resistors
Features
• General purpose resistor ideal for commercial/industrial applications
• Flame retardant coatings standard, flameproof optional (contact factory)
• Panasert available on selected sizes (contact factory)
• Auto sequencing/insertion compatible
• CFM (mini) an ideal choice when size constraints apply
• Cut and formed product is available on select sizes; contact factory for details
• Standard lead wire for CF/CFM is copper plated steel, with 100% tin overplate
• 100% tin plate on copper wire is available as type CFQ/CFQM
• RoHS compliant / lead-free
Electrical Specifications
Type / Code
Power Rating
(Watts) @ 70°C
0.125W
0.250W
0.500W
1.000W
2.000W
0.250W
0.500W
Maximum
Working
Voltage*
250V
350V
350V
500V
500V
250V
350V
Maximum
Pulse Voltage
500V
600V
700V
1,000V
1,000V
500V
600V
Dielectric Withstanding
Voltage
300V
500V
700V
1,000V
1,000V
500V
500V
Ohmic Range and Tolerance
2%
10Ω – 4.7MΩ
1Ω – 4.7MΩ
10Ω – 4.7MΩ
1Ω – 10MΩ
10Ω – 1MΩ
10Ω – 1MΩ
10Ω – 4.7MΩ
5%
1Ω – 22MΩ
1Ω – 22MΩ
1Ω – 22MΩ
1Ω – 22MΩ
1Ω – 22MΩ
1Ω – 22MΩ
1Ω – 22MΩ
CF 1/8
CF 1/4
CF 1/2
CF 1
CF 2
CFM 1/4
CFM 1/2
* Lesser of
√PR
or maximum working voltage.
How to Order
CF
SEI Type
1/2
Code
4.7K
Nominal Resistance
5%
Tolerance
R
Packaging
Type
CF
CFM
PCF
PCFM
CFQ
Description
EIA Standard
Mini
Panasert CF 1/4
Panasert CFM 1/2
Tin plating on copper wire
Code
1/8
1/4
1/2
1
2
Tolerance Values
2%
5%
E24
E24
SEI Types
CF 1
CF 2
CF 1/4; CFM 1/2
CF 1/8, CF 1/4, CFM 1/4, CFM 1/2
CF 1/2
CF 1, CF 2
CF 1/4; CFM 1/2
All
Qty
2,000
1,000
2,000
5,000
2,000
1,000
5,000
1,000
Description Code
Tape
R
Q
Ammo
T
P
A
CF 1/8, CF 1/4, CF 1/2, CFM 1/4, CFM 1/2 5,000
CFQM Tin plating on copper wire (mini)
Panasert
Bulk
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
59
email: marketing@seielect.com
Rev 08/07
CF / CFM Series — Carbon Film Resistors
Mechanical Specifications
Type / Code
CF 1/8
CF 1/4
CF 1/2
CF 1
CF 2
CFM 1/4
CFM 1/2
A
Body Length
0.13 + 0.01/-0
3.2 + 0.2/-0
0.26 ± 0.02
6.5 ± 0.5
0.33 ± 0.02
8.5 ± 0.50
0.43 ± 0.04
11.0 ± 1.0
0.59 ± 0.04
15.0 ± 1.0
0.13 + 0.01/-0
3.2 + 0.2/-0
0.26 ± 0.02
6.5 ± 0.5
B
Body Diameter
0.07 ± 0.01
1.8 ± 0.2
0.09 ± 0.01
2.3 ± 0.2
0.11 ± 0.02
2.7 ± 0.5
0.18 ± 0.02
4.5 ± 0.5
0.20 ± 0.02
5.0 ± 0.5
0.07 ± 0.01
1.8 ± 0.2
0.09 ± 0.01
2.3 ± 0.2
C
Lead Length (Bulk)
1.10 ± 0.12
28.0 ± 3.0
1.10 ± 0.12
28.0 ± 3.0
1.10 ± 0.12
28.0 ± 3.0
1.18 ± 0.12
30.0 ± 3.0
1.18 ± 0.12
30.0 ± 3.0
1.10 ± 0.12
28.0 ± 3.0
1.10 ± 0.12
28.0 ± 3.0
D
Lead Diameter
0.018 ± 0.002
0.45 ± 0.05
0.022 ± 0.002
0.56 ± 0.05
0.024 ± 0.002
0.60 ± 0.05
0.031 ± 0.004
0.80 ± 0.1
0.031 ± 0.004
0.80 ± 0.1
0.018 ± 0.002
0.45 ± 0.05
0.022 ± 0.002
0.56 ± 0.05
Units
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
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
Requirement
± 0.5%
± 0.5%
± 0.5%
± 1.0%
± 0.2%
± 0.5%
Operating Temperature Range : -55°C to +155°C
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
60
email: marketing@seielect.com
Rev 08/07
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
