document number: 50014 revision 19-feb-02 www.viSHay.com 54 SH viSHay sfernice for technical questions, contact sfer@viSHay.com features 50 watt at + 25 c high power characteristics utilize heatsink capability good mechanical protection industrialized product heatsink encased wirewound power resistors industrial applications 28.5 1.5 12.5 11.3 16.3 6.8 1.5 8.5 6.2 16.4 2.4 8.9 4.3 1.6 2.1 25.3 1.5 3 35 1.5 5.9 14 19 7.9 1.5 11 7.9 20.6 2.4 11 5.6 2 2.1 30.6 1.5 8.8 49 1.3 19.8 18.3 28 11.1 1.5 14 9.9a 27.5 3.2 15 8 2.4 2.1 44.6 1.3 16.5 70.2 1.4 21.4 39.7 50 11 1.2 15.5 10.7 29.4 3.2 15 8 2.4 2.1 66.5 1.4 30.8 model and style a b 0.2 d 0.2 e 0.5 f g 1 h 0.7 j 0.5 ? k 0.1 l max. m 0.5 n 0.3 ? p min. q weight in g SH5 SH10 SH25 SH50 SH viSHay sfernice model and style power rating chassis mounted resistors: 413cm 2 for SH5 and SH10 536cm 2 for SH25 and SH50 unmounted resistors ohmic value tolerance rated maximum voltage dielectric strength vrms insulation resistance temperature coefficient climatic category temperature limits 25c at 70c 25c at 70c SH5 10w 8w 4w 3.2w 160v 800v > 10 4 m ? 50ppm/ c rn > 50 ? 55/200/56 ? 55 c + 200 c > 3.10 4 m ? 5% 0.1 ? 3.3k ? 12.5w 10w 6w 4.8w 250v 1000v 0.1 ? 15k ? 25w 20w 9w 7.2w 550v 2000v 2000v 0.1 ? 33k ? 50w 40w 12w 9.6w 1285v 0.1 ? 51k ? SH10 SH25 SH50 electrical specifications d a n m f ? 2 ? k ? p e q l g h b j built for high power dissipation applications, these components have very good overall characteristics for industrial use under harSH environmental conditions. dimensions in millimeters
www.viSHay.com 55 SH viSHay sfernice document number: 50014 revision 19-feb-02 for technical questions, contact sfer@viSHay.com tests momentary overload climatic sequence load life 0.5% max. + 0.05 ? 1% max. + 0.05 ? 1% max. + 0.05 ? 5pn/5s ? 55 c + 200 c 5 cycles nominal power pn 1000h at 25 c conditions typical drifts performance heatsink encased wirewound power resistors industrial applications power rating chart ambient temperature in c % rated power 100 75 50 25 0 0 50 100 150 200 250 275 300 350 temperature rise rated power in watts (mounted on heatsink chassis) hot spot temperature in c 200 150 100 50 0 0 10 20 30 40 50 60 70 SH 10 SH 5 SH 25 SH 50 marking sfernice trademark, model, style, nominal resistance (in ? ), tolerance (in %), manufacturing date. style SH model 25 tolerance 5% ohmic value 10k ? ordering information
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