wsbs8518...20 www.vishay.com vishay dale revision: 24-feb-17 1 document number: 30341 for technical questions, contact: ww2cresistors@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 power metal strip ? shunt resistor with two sense pins, very low value (50 ? , 100 ? , 125 ? , and 250 ? ) design tools (click logo to get started) features ? high power to resistor size ratio ? sense pins allow for consistent contact location ? proprietary processing technique produces extremely low resistance values ? welded terminal to element construction ? solid metal manganese- copper alloy resistive element with low tcr (< 20 ppm/c) ? very low inductance (< 5 nh) ? low thermal emf (as low as < 1 v/c) ? material categorization: fo r definitions of compliance please see www.vishay.com/doc?99912 notes (1) please reference ws bs851835 datasheet ( www.vishay.com/doc?30355 ) for resistance values 500 ? to 1000 ? (2) other values may be available, contact factory available model s standard electrical specifications global ? model size power rating p 70 c w tolerance % resistance value range (1) ? resistance values currently available (2) ? weight (typical) g wsbs8518...20 8518 36 5, 10 50 to 1000 50, 100, 125, 250 50 = 38.4, 100 / 125u = 36.9, 250 = 34.2 technical specifications parameter unit resistor characteristics temperature coefficient ppm/c 200 for 50 ? 175 for 100 ? / 125 ? 110 for 250 ? temperature coefficient (element material) ppm/c 20 operating temperature range c -65 to +170 thermal emf v/c < 1 for 50 ? and < 3 for 100 ? , 125 ? , 250 ? inductance nh < 5 maximum current rating a ( p / r ) 1/2 global part number information global part numbering: ws bs8518l1000jt20 (WSBS851820, 0.0001 ? , 5 %, tray pack) global model resistance value tolerance code packaging code special wsbs8518 l = m ? l0500 = 0.000050 ? l1000 = 0.000100 ? l1250 = 0.000125 ? l2500 = 0.000250 ? j = 5 % k = 10 % k = bulk pack t = tray pack 20 = sense pins attached w s b s 8 5 1 8 l 1 0 0 0 j t 2 0
wsbs8518...20 www.vishay.com vishay dale revision: 24-feb-17 2 document number: 30341 for technical questions, contact: ww2cresistors@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 dimensions in inches (millimeters) derating note (1) minimum pull strength of 200 n ( 1 ) 70 120 100 80 60 40 20 0 175 150 125 100 75 50 25 0 - 25 - 50 - 65 ambient temperature in c rated power in % tolerances on decimals .xxx 0.005 [.x 0.1] unless otherwise listed resistance value ( ? ) element material a reference b 0.005 [ 0.13] 50 mn-cu 0.145 [3.68] 0.135 [3.43] 100 mn-cu 0.370 [9.40] 0.495 [12.57] 125 mn-cu 0.480 [12.19] 0.585 [14.86] 250 mn-cu 0.900 [22.86] 1.028 [26.11] performance test conditions of test test limits thermal shock -55 c to +150 c, 1000 cy cles, 15 min at each extreme 0.5 % short time overlo ad 5x rated power for 5 s 0.5 % low temperature storage - 65 c for 24 h 0.5 % high temperature exposure 1000 h at +170 c 1.0 % bias humidity +85 c, 85 % rh, 10 % bias, 1000 h 0.5 % mechanical shock 100 g s for 6 ms, 5 pulses 0.5 % vibration frequency varied 10 hz to 2000 hz in 1 min, 3 directions, 12 h 0.5 % load life 1000 h at +70 c, 1.5 h on, 0.5 h off 1.0 % moisture resistance mil-std- 202, method 106, 0 % power, 7b not required 0.5 %
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