Through-hole resisT ors
General Type
Carbon Film Resistors
Normal & Miniature Style [ CFR Series ]
FeATures
Power Rating 1/6W, 1/4W, 1/2W, 1W, 2W, 3W
Resistance Tolerance 2%, 5%
T.C.R. see Table 1
DerATiNg Cur Ve
For resistors operated in ambient temperatures above 70C, power rating must be derated
in accordance with the curve below.
iNTroDuCTioN
70 155 C
Rated Load (%)
100
The CFR Series Carbon Film Resistors are
80
manufactured by coating a homogeneous
film of pure carbon on high grade ceramic
60
rods. After a helical groove has been cut in
40
the resistive layer, tinned connecting leads of
20
electrolytic copper are welded to the end-caps.
Ambient Temperature (C)
20 40 60 80 100 120 140 160
The resistors are coated with layers of tan
color lacquer.
TABle 1 TeMPerATure CoeFFiCieNT
s TYle TeMP. Coe FFiCie NT (ppm/C)
under 100K 100K - 1M 1M - 10M
CFR100, CFR200, CFR2WS, CFR3WS -350~350 -500~0 -1,500~0
CFR-12, CFR-25, CFR-50,
-350~500 -700~0 -1,500~0
CFR25S, CFR50S, CFR1WS
DiMeNsioNs
Unit: mm
s TYle DiMeNsio N
Normal Miniature l D h d
CFR-12 CFR25S 3.40.3 1.90.2 282.0 0.450.05
d
CFR-25 CFR50S 6.30.5 2.40.2 282.0 0.550.05
H L D
CFR-50 CFR1WS 9.00.5 3.30.3 262.0 0.550.05
CFR100 CFR2WS 11.51.0 4.50.5 352.0 0.80.05
CFR200 CFR3WS 15.51.0 5.00.5 332.0 0.80.0527
Note:
eleCTriCAl ChArACTerisTiCs
s TYle CFr -12 CFr 25s CFr -25 CFr 50s CFr -50 CFr 1Ws CFr 100 CFr 2Ws CFr 200 CFr 3Ws
Power Rating at 70C 1/6W 1/4W 1/2W 1W 2W 3W
Maximum Working Voltage 150V 200V 250V 300V 350V 400V 500V
Maximum Overload Voltage 300V 400V 500V 600V 700V 800V 1,000V
Voltage Proof on Insulation 300V 400V 500V 700V 1,000V
Resistance Range 1 - 10M & 0 for E24 series value
Operating Temp. Range -55C to +155C
Temperature Coefficient see Table 1
Note: Special value is available on request
eNViroNMeNTAl ChArACTerisTiCs
Per For MANCe Tes T Tes T MeTho D APPr Aise
Shor t Time Overload IEC 60115-1 4.13 2.5 times RCWV for 5 Sec. 0.75%+0.05
Voltage Proof on Insulation IEC 60115-1 4.7 in V-block for 60 Sec., test voltage by type By type
Temperature Coefficient IEC 60115-1 4.8 -55C to +155C By type
Insulation Resistance IEC 60115-1 4.6 in V-block for 60 Sec. >1,000M
Solderability IEC 60115-1 4.17 2355C for 30.5 Sec. 95% Min. coverage
No deterioration of
Solvent Resistance of Marking IEC 60115-1 4.30 IPA for 50.5 Min. with ultrasonic
coatings and markings
Robustness of Terminations IEC 60115-1 4.16 Direct load for 10 Sec. in the direction of the terminal leads 2.5kg (24.5N)
Periodic-pulse Overload IEC 60115-1 4.39 4 times RCWV 10,000 cycles (1 Sec. on, 25 Sec. off) 1.0%+0.05
Damp Heat Steady State IEC 60115-1 4.24 402C, 90-95% RH for 56 days, loaded with 0.1 times RCWV 3.0%+0.05
Endurance at 70C IEC 60115-1 4.25 702C at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off) 3.0%+0.05
Temperature Cycling IEC 60115-1 4.19 -55C Room Temp. +155C Room Temp. (5 cycles) 1.0%+0.05
Resistance to Soldering Heat IEC 60115-1 4.18 2603C for 101 Sec., immersed to a point 30.5mm from the body 1.0%+0.05
Note: RCWV(Rated Continuous Working Voltage) = Power Rating x Resistance Value or Max. working voltage listed above, whichever less. Revision: 201304