Leaded ResistoRs
Carbon Film Resistors
Flame-Proof Type
Normal & Miniature Style [ FCR Series ]
FeatURes
Power Rating
Resistance Tolerance
T.C.R.
Flameproof Multi-layer Coating Meets
Flameproof Feature Meets Overload Test
1/4W, 1/2W, 1W, 2W, 3W
±2%, ±5%
see Table 1
UL-94V-0
UL-1412
deRatiNG CURVe
iNtRodUCtioN
The FCR Series Carbon Film Flame Proof
Resistors are manufactured by coating a ho-
mogeneous 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
gray 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
Max. VaLUe oF teMP. CoeFFiCieNt PPM/°C
under 100K
Ω
FCR100, FCR200, FCR2WS, FCR3WS
FCR-25, FCR-50, FCR50S, FCR1WS
±350
+350 / -500
100K
Ω
- 1M
Ω
-500
-700
1M
Ω
- 10M
Ω
-1,500
-1,500
diMeNsioNs
stYLe
Normal
ød
H
L
th color code: black
øD
FCR-25
FCR-50
FCR100
FCR200
Miniature
FCR50S
FCR1WS
FCR2WS
FCR3WS
diMeNsioN
L
6.3±0.5
9.0±0.5
11.5±1.0
15.5±1.0
ød
2.4±0.2
3.3±0.3
4.5±0.5
5.0±0.5
H
28±2.0
26±2.0
35±2.0
33±2.0
Unit: mm
ød
0.55±0.05
0.55±0.05
0.8±0.05
0.8±0.05
33
Note:
eLeCtRiCaL CHaRaCteRistiCs
stYLe
Power Rating at 70°C
Maximum Working Voltage
Maximum Overload Voltage
Dielectric Withstanding Voltage
Resistance Range
Operating Temp. Range
Temperature Coefficient
FCR-25
1/4W
250V
500V
400V
FCR50s
1/2W
300V
600V
350V
700V
500V
FCR-50
FCR1Ws
1W
400V
800V
600V
500V
1,000V
750V
FCR100
FCR2Ws
2W
FCR200
FCR3Ws
3W
1
Ω
- 10M
Ω
& 0
Ω
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
Dielectric Withstanding Voltage
Temperature Coefficient
Insulation Resistance
Solderability
Resistance to Solvent
Terminal Strength
Pulse Overload
Load Life in Humidity
Load Life
Temperature Cycling
Resistance to Soldering Heat
Overload Flame Retardant
test MetHod
JIS-C-5202 5.5
JIS-C-5202 5.7
JIS-C-5202 5.2
JIS-C-5202 5.6
JIS-C-5202 6.5
JIS-C-5202 6.9
JIS-C-5202 6.1
JIS-C-5202 5.8
JIS-C-5202 7.9
JIS-C-5202 7.10
JIS-C-5202 7.4
JIS-C-5202 6.4
JIS-C-5202 7.12
2.5 times RCWV for 5 Sec.
in V-Block for 60 Sec.
-55°C to +155°C
in V-Block
260±5°C for 5±0.5 Sec.
IPA for 1 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 at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off)
70°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)
350±10°C for 3±0.5 Sec.
4 times RCWV for 1 Min.
aPPRaise
±0.75%+0.05
Ω
By type
By type
>1,000M
Ω
95% Min. coverage
No deterioration of
coatings and markings
≥2.5kg
(24.5N)
±1.0%+0.05
Ω
±3%+0.05
Ω
±3%+0.05
Ω
±1%+0.05
Ω
±1%+0.05
Ω
No evidence of flaming
or arcing
Note: Rated Continuous Working Voltage (RCWV) =
Power Rating x Resistance Value
