dimensions unit: mm s ty le d i m e n sio n normal miniature l ?d h ?d cfr-12 cfr25s 3.40.3 1.90.2 282.0 0.450.05 cfr-25 cfr50s 6.30.5 2.40.2 282.0 0.550.05 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 0.80.05 fe atures power rating 1/6w, 1/4w, 1/2w, 1w, 2w, 3w resistance tolerance 2%, 5% t.c.r. see table 1 der ating cur ve for resistors operated in ambient temperatures above 70c, power rating must be derated in accordance with the curve below. tab le 1 temper ature coefficient s ty le te mp . coe ff i c ie 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, cfr25s, cfr50s, cfr1ws -350~500 -700~0 -1,500~0 ?d h l ?d int roduction 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. general type normal & miniature style [ cfr series ] carbon film resistors rated load (%) ambient temperature (c) 160 140 120 100 80 60 40 100 80 60 40 20 20 70 155 c through-hole resis t ors
27 electrical char acteristics s ty le cf r -12 cf r 25 s cf r -25 cf r 50 s cf r -50 cf r 1w s cf r 100 cf r 2w s cf r 200 cf r 3w s 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 coeffcient see table 1 note: special value is available on request env ironme ntal char acteristics p er f or manc e t es t t es t m e t ho d app r a ise short 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 coeffcient 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 solvent resistance of marking iec 60115-1 4.30 ipa for 50.5 min. with ultrasonic no deterioration of 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 note:
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