1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 1 wh/wn series miniature molded wirewound feature s ? wh precision series ? wn aryton perry winding non-inductive series: inductance <1nh at 1mhz test, ? designed to meet mil-r-26f, mil-std-202 stan- dard requirements ? manufacturing process -wire winding/ spot welding- by computer numerical control (cnc) machine tools to ensure consistency of product quality. ? encapsulated by epoxy molding compound ? advanced ic encapsulation mold/die technologies c haracteristics ceramic core ceramtec rubalit ? 85% alumina end caps stainless steel, precision formed leads copper wire,100% sn (lead free) coated resistance wire isaohm ? wire tc 20ppm/c encapsulation sumicon 1100/1200 epoxy molding compound for ic encapsulation standard tolerance d (0.5%), f (1.0%), j (5.0%) temperature coefficient (ppm/c) 90 for 0.100 -0.99 , 50 for 1.00 -10.00, 20 for >10.00 maximum working voltage (pxr) 1/2 derating linearly from 100% @ +70c to 0% @ +150c. operating temp -55c to +150c serie s specif ications power resistance rating range weight type (watts) ( ) (g/1000pc) wha 0.5 0.100 - 1.0k 216 wna 0.100 - 250 whb 1 0.100 - 4.0k 296 wnb 0.100 - 1.0k whc 2 0.10 - 8.0k 712 wnc 0.10 - 2.0k whd 3 0.10 - 25k 1160 wnd 0.10 - 5.0k whe 5 0.10 - 50k 2920 wne 0.10 - 10k ld 0.984 / 25 d ?? dimensions type wattage l d d wh/na 0.5 5.08 / 0.200 2.54 / 0.100 0.60 / 0.024 wh/nb 1 7.00 / 0.276 3.00 / 0.120 0.60 / 0.024 wh/nc 2 11.4 / 0.450 6.86 / 0.270 0.80 / 0.031 wh/nd 1 13.54 / 0.530 5.50 / 0.216 0.80 / 0.031 wh/ne 2 20.00 / 0.790 7.50 / 0.295 1.00 / 0.039 tape reel pc/ width pitch diam. reel 64 / 2.520 5.0 / 0.197 290 / 11.41 1000 64 / 2.520 5.0 / 0.197 290 / 11.41 1000 64 / 2.520 10 / 0.393 290 / 11.41 1000 84 / 3.307 10 / 0.393 290 / 11.41 500 4 / 3.307 10 / 0.393 290 / 11.41 500 packaging axial lead wirewound
1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 2 standard part numbers wattage: 0.5 0.5 1.0 1.0 2.0 2.0 3.0 3.0 5.0 5.0 series: wha wna whb wnb whc wnc whd wnd whe wne ohms 0.1 whar10fe wnar10fe whbr10fe wnbr10fe whcr10fe wncr10fe whdr10fe wndr10fe wher10fe wner10fe 0.25 whar25fe wnar25fe whbr25fe wnbr25fe whcr25fe wncr25fe 0.5 whar50fe wnar50fe whbr50fe wnbr50fe WHCR50FE wncr50fe whdr50fe wndr50fe wher50fe wner50fe 0.75 whar75fe wnar75fe whbr75fe wnbr75fe whcr75fe wncr75fe 1 wha1r0fe wna1r0fe whb1r0fe wnb1r0fe whc1r0fe wnc1r0fe whd1r0fe wnd1r0fe whe1r0fe wne1r0fe 2 wha2r0fe wna2r0fe whb2r0fe wnb2r0fe whc2r0fe wnc2r0fe 4 wha4r0fe wna4r0fe whb4r0fe wnb4r0fe whc4r0fe wnc4r0fe 5 wha5r0fe wna5r0fe whb5r0fe wnb5r0fe whc5r0fe wnc5r0fe whd5r0fe wnd5r0fe whe5r0fe wne5r0fe 10 wha10rfe wna10rfe whb10rfe wnb10rfe whc10rfe wnc10rfe whd10rfe wnd10rfe whe10rfe wne10rfe 15 wha15rfe wna15rfe whb15rfe wnb15rfe whc15rfe wnc15rfe whd15rfe wnd15rfe whe15rfe wne15rfe 25 wha25rfe wna25rfe whb25rfe wnb25rfe whc25rfe wnc25rfe 51 wha51rfe wna51rfe whb51rfe wnb51rfe whc51rfe wnc51rfe 75 wha75rfe wna75rfe whb75rfe wnb75rfe whc75rfe wnc75rfe 100 wha100fe wna100fe whb100fe wnb100fe whc100fe wnc100fe whd100fe wnd100fe whe100fe wne100fe 150 wha150fe wna150fe whb150fe wnb150fe whc150fe wnc150fe 200 wha200fe wna200fe whb200fe wnb200fe whc200fe wnc200fe 250 wha250fe wna250fe whb250fe wnb250fe whc250fe wnc250fe whd250fe wnd250fe whe250fe wne250fe 330 wha330fe whb330fe wnb330fe whc330fe wnc330fe 470 wha470fe whb470fe wnb470fe whc470fe wnc470fe 560 wha560fe whb560fe wnb560fe whc560fe wnc560fe whd560fe wnd560fe whe560fe wne560fe 750 wha750fe whb750fe wnb750fe whc750fe wnc750fe 1k wha1k0fe whb1k0fe wnb1k0fe whc1k0fe wnc1k0fe whd1k0fe wnd1k0fe whe1k0fe wne1k0fe 2.5k whb2k5fe whc2k5fe wnd2k5fe 5k whd5k0fe whe5k0fe wne5k0fe 10k whd10kfe whe10kfe wne10kfe 25k whe25kfe performan ce characteristics test conditions of test performance thermal shock environmental chamber, -55c +0c, -3c to 150c +3c, -0c, 5 cycles, minimum 15 min. at each extreme (1.0% + 0.5m ) r short-time overload overload voltage 5x rated wattage for 5 sec. (0.5% + 0.5m ) r solderability bath temp. 260c 5, immersion time 5 sec. 0.5, jis c 5201 4.18 >90% of contact face covered new solder resistance to solder heat bath temp. 260c 5, immersion time 5 sec. 0.5, jis c 5201 4.18 (0.5% + 0.5m ) r dielectric withstanding voltage magnitude of test voltage >500 volts rms.; duration 1 min. pass insulation resistance magnitude of test voltage 500 volts rms. 10%; duration 1 min. >10 9 high temperature exposure exposed to an ambient temperature of 175c +5/-0 for 250 8 hours (1.0% + 0.5m ) r low temperature storage at a temperature of -65c 2 for a period of 24 hours 4 (0.5% + 0.5m ) r life test temp. at 70c 2, rated dc continuous working voltage applied, 1.5 hours on and 0.5 hours off, 1000 hours (2.0% + 0.5m ) r axial lead wirewound wh/wn series miniature molded wirewound how to order series ohms power a = 0.5 b =1 c = 2 d = 3 e = 5 tolerance f = 1% j = 5% d = 0.5% packag e t = t ape blank = 25pc pack rohs compliant h = inductive n = non inductive part marking: 0.50, 1.0, 2.0 watt parts marked with 5-band color code, 3.0 and 5.0 watt parts marked with part number stamping
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