l eaded r es isto r s di m e n sio n s unit: mm st yl e di m e n sio n normal miniature l ? d h ?d frm-25 frm50s 6.30.5 2.40.2 282.0 0.550.05 frm-50 frm1ws 9.00.5 3.30.3 262.0 0.550.05 frm100 frm2ws 11.51.0 4.50.5 352.0 0.80.05 frm200 frm3ws 15.51.0 5.00.5 332.0 0.80.05 f eat ur es power rating 1/4w, 1/2w, 1w, 2w, 3w resistance tolerance 2%, 5% t.c.r. 200ppm/c flameproof multi-layer coating meets ul-94v-0 flameproof feature meets overload test ul-1412 de r ati ng curv e for resistors operated in ambient temperatures above 70c, power rating must be derated in accordance with the curve below. f u si ng ch a r a c te r isti c s r < 2.0 fusing time within 30 seconds at 25 times of rated power r > 2.2 fusing time within 30 seconds at 16 times of rated power fusing residual resistive value at least 100 times rated resistance metal film resistors fusible & flame-proof type normal & miniature style [ frm series ] i n t r od uc tio n the frm series metal film fusible resistors are manufactured using vacuum sputtering system to deposit multiple layers of mixed metals alloy and passivative materials onto a carefully treated high grade ceramic substrate. 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 normal size & pink color lacquer for miniature size. overload protection without risk of fre. wide range of overload currents. th color code: white ?d h l ?d rated load (%) ambient temperature (c) 160 140 120 100 80 60 40 100 80 60 40 20 20 70 155 c
note: 23 note: rated continuous working voltage (rcwv) = power rating x resistance value e l e c t r i c a l ch a r a c te r isti c s st yl e frm-25 frm50 s frm-50 frm1w s frm100 frm2w s frm200 frm3w s power rating at 70c 1/4w 1/2w 1w 2w 3w maximum working voltage 200v 250v 300v 350v maximum overload voltage 400v 500v 600v 700v dielectric withstanding voltage 250v 350v resistance range 4.7 - 560 (2%) for e24 series value & 2.2 - 560 (5%) for e24 series value operating temp. range -55c to +155c temperature coeffcient 200ppm/c note: special value is available on request e nv i r o nm e n ta l ch a r a c te r isti c s p e rf o rm a nc e test test m et h od a ppr aise short time overload jis-c-5202 5.5 2.5 times rcwv for 5 sec. 2.0%+0.05 dielectric withstanding voltage jis-c-5202 5.7 in v-block for 60 sec. by type temperature coeffcient jis-c-5202 5.2 -55c to +155c by type insulation resistance jis-c-5202 5.6 in v-block >100m solderability jis-c-5202 6.5 2605c for 50.5 sec. 95% min. coverage no deterioration of coatings and markings resistance to solvent jis-c-5202 6.9 ipa for 1 min. with ultrasonic terminal strength jis-c-5202 6.1 direct load for 10 sec. in the direction of the terminal leads 2.5kg (24.5n) pulse overload jis-c-5202 5.8 4 times rcwv 10,000 cycles (1 sec. on, 25 sec. off) 1.0%+0.05 load life in humidity jis-c-5202 7.9 402c, 90-95% rh at rcwv for 1,000 hr. (1.5 hr. on, 0.5 hr. off) 5.0%+0.05 load life jis-c-5202 7.10 70c at rcwv for 1,000 hr. (1.5 hr. on, 0.5 hr. off) 5.0%+0.05 temperature cycling jis-c-5202 7.4 -55c ? room temp. ? +155c ? room temp. (5 cycles) 2.0%+0.05 resistance to soldering heat jis-c-5202 6.4 35010c for 30.5 sec. 1.0%+0.05 overload flame retardant jis-c-5202 7.12 4 times rcwv for 1 min. no evidence of faming or arcing
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