Leaded ResistoRs
Flame-Proof Type
Carbon Film Resistors
Normal & Miniature Style [ FCR Series ]
FeatURes
Power Rating
1/4W, 1/2W, 1W, 2W, 3W
±2%, ±5%
ResistanceTolerance
T.C.R.
seeTable 1
Flameproof Multi-layer Coating Meets
Flameproof Feature Meets OverloadTest
UL-94V-0
UL-1412
deRatiNG CURVe
iNtRodUCtioN
For resistors operated in ambient temperatures above 70°C, power rating must be derated
in accordance with the curve below.
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.
70
155 °C
Rated Load (%)
100
80
60
40
20
Ambient Temperature (°C)
20 40 60 80 100 120 140 160
taBLe 1 teMPeRatURe CoeFFiCieNt
stYLe
Max. VaLUe oF teMP. CoeFFiCieNt PPM/°C
unꢀꢁr 100K Ω 100K Ω - 1M Ω 1M Ω - 10M Ω
FCR100, FCR200, FCR2WS, FCR3WS ±350
-500
-700
-1,500
-1,500
FCR-25, FCR-50, FCR50S, FCR1WS
+350 / -500
diMeNsioNs
Unit: mm
stYLe
diMeNsioN
L
Nꢂrmꢃl
FCR-25
FCR-50
FCR100
FCR200
Mꢄnꢄꢃꢅurꢁ
FCR50S
ød
H
øꢀ
ød
6.3±0.5
9.0±0.5
11.5±1.0
15.5±1.0
2.4±0.2
3.3±0.3
4.5±0.5
5.0±0.5
28±2.0
26±2.0
35±2.0
33±2.0
0.55±0.05
0.55±0.05
0.8±0.05
0.8±0.05
H
L
øD
FCR1WS
FCR2WS
FCR3WS
ꢀth color code: black