Through-hole resisTors
Carbon Film Resistors
General Type
Normal & Miniature Style [ CFR Series ]
FeATures
Power Rating
Resistance Tolerance
T.C.R.
1/6W, 1/4W, 1/2W, 1W, 2W, 3W
±2%, ±5%
see Table 1
DerATiNg CurVe
iNTroDuCTioN
The CFR Series Carbon Film Resistors are
manufactured by coating a homogeneous
film of pure carbon on high grade ceramic
rods. After a helical groove has been cut in
the resistive layer, tinned connecting leads of
electrolytic copper are welded to the end-caps.
The resistors are coated with layers of tan
color lacquer.
For resistors operated in ambient temperatures above 70°C, power rating must be derated
in accordance with the curve below.
Rated Load (%)
70
100
80
60
40
20
20
40
60
80
100 120 140 160
155 °C
Ambient Temperature (°C)
TABle 1 TeMPerATure CoeFFiCieNT
sTYle
TeMP. CoeFFiCieNT (ppm/°C)
under 100KΩ
CFR100, CFR200, CFR2WS, CFR3WS
CFR-12, CFR-25, CFR-50,
CFR25S, CFR50S, CFR1WS
-350~350
-350~500
100K
Ω
- 1MΩ
-500~0
-700~0
1MΩ - 10MΩ
-1,500~0
-1,500~0
DiMeNsioNs
sTYle
Normal
ød
H
L
øD
CFR-12
CFR-25
CFR-50
CFR100
CFR200
Miniature
CFR25S
CFR50S
CFR1WS
CFR2WS
CFR3WS
DiMeNsioN
l
3.4±0.3
6.3±0.5
9.0±0.5
11.5±1.0
15.5±1.0
øD
1.9±0.2
2.4±0.2
3.3±0.3
4.5±0.5
5.0±0.5
h
28±2.0
28±2.0
26±2.0
35±2.0
33±2.0
Unit: mm
ød
0.45±0.05
0.55±0.05
0.55±0.05
0.8±0.05
0.8±0.05
27
Note:
eleCTriCAl ChArACTerisTiCs
sTYle
Power Rating at 70°C
Maximum Working Voltage
Maximum Overload Voltage
Voltage Proof on Insulation
Resistance Range
Operating Temp. Range
Temperature Coefficient
CFr-12
1/6W
150V
300V
300V
CFr25s
1/4W
200V
400V
400V
250V
500V
500V
CFr-25
CFr50s
1/2W
300V
600V
350V
700V
CFr-50
CFr1Ws CFr100
1W
400V
800V
700V
500V
1,000V
1,000V
CFr2Ws CFr200
2W
CFr3Ws
3W
1Ω - 10MΩ & 0Ω for E24 series value
-55°C to +155°C
see Table 1
Note: Special value is available on request
eNViroNMeNTAl ChArACTerisTiCs
PerForMANCe TesT
Short Time Overload
Voltage Proof on Insulation
Temperature Coefficient
Insulation Resistance
Solderability
Solvent Resistance of Marking
Robustness of Terminations
Periodic-pulse Overload
Damp Heat Steady State
Endurance at 70°C
Temperature Cycling
Resistance to Soldering Heat
TesT MeThoD
IEC 60115-1 4.13
IEC 60115-1 4.7
IEC 60115-1 4.8
IEC 60115-1 4.6
IEC 60115-1 4.17
IEC 60115-1 4.30
IEC 60115-1 4.16
IEC 60115-1 4.39
IEC 60115-1 4.24
IEC 60115-1 4.25
IEC 60115-1 4.19
IEC 60115-1 4.18
2.5 times RCWV for 5 Sec.
in V-block for 60 Sec., test voltage by type
-55°C to +155°C
in V-block for 60 Sec.
235±5°C for 3±0.5 Sec.
IPA for 5±0.5 Min. with ultrasonic
Direct load for 10 Sec. in the direction of the terminal leads
4 times RCWV 10,000 cycles (1 Sec. on, 25 Sec. off)
40±2°C, 90-95% RH for 56 days, loaded with 0.1 times RCWV
70±2°C at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off)
-55°C
Room Temp.
+155°C
Room Temp. (5 cycles)
260±3°C for 10±1 Sec., immersed to a point 3±0.5mm from the body
APPrAise
±0.75%+0.05Ω
By type
By type
>1,000MΩ
95% Min. coverage
No deterioration of
coatings and markings
≥2.5kg (24.5N)
±1.0%+0.05Ω
±3.0%+0.05Ω
±3.0%+0.05Ω
±1.0%+0.05Ω
±1.0%+0.05Ω
Revision: 201304
Note: RCWV(Rated Continuous Working Voltage) = Power Rating x Resistance Value or Max. working voltage listed above, whichever less.
