wsbs8518...34 www.vishay.com vishay dale revision: 09-mar-17 1 document number: 30354 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, low tcr (down to < 10 ppm/c), very low value (100 ? , 500 ? , and 1000 ? ) design support tools click logo to get started features ? high power to resistor size ratio ? proprietary processing technique produces extremely low resistance values ? all welded construction ? solid metal nickel-chrome alloy resistive element with unique design for low tcr ? (down to 10 ppm/c) ? very low inductance (< 5 nh) ? low thermal emf (as low as < 1.25 v/c) ? patent(s): www.vishay.com/patents ? material categorization: fo r definitions of compliance please see www.vishay.com/doc?99912 note (1) other values may be available, contact factory patent(s): www.vishay.com/patents ? this vishay product is protected by one or more united states an d international patents. available model s standard electrical specifications global ? model size power rating p 70 c w tolerance % resistance value range ? resistance values currently available (1) ? weight (typical) g wsbs8518...34 8518 36 5, 10 100 to 1000 100 36.0 wsbs8518...34 8518 25 5, 10 100 to 1000 500 33.4 wsbs8518...34 8518 20 5, 10 100 to 1000 1000 31.3 technical specifications parameter unit resistor characteristics temperature coefficient ppm/c 65 for 100 ? 10 for 500 ? 25 for 1000 ? operating temperature range c -65 to +170 thermal emf v/c < 1.25 inductance nh < 5 maximum current rating a ( p / r ) 1/2 global part number information global part numbering: ws bs8518l5000jt34 (WSBS851834, 0.0005 ? , 5 %, tray pack) global model resistance value tolerance code packaging code special wsbs8518 l = m ? l1000 = 0.000100 ? l5000 = 0.000500 ? 1l000 = 0.001000 ? j = 5 % k = 10 % k = bulk pack t = tray pack 34 = low tcr w s b s 8 5 1 8 l 5 0 0 0 j t 3 4
wsbs8518...34 www.vishay.com vishay dale revision: 09-mar-17 2 document number: 30354 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 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 100 ni-cr 0.120 [3.05] 500 ni-cr 0.615 [15.62] 1000 ni-cr 0.900 [22.86] performance test conditions of test test limits thermal shock -55 c to +150 c, 1000 cy cles, 15 min at each extreme 0.5 % ? r short time overlo ad 5x rated power for 5 s 0.5 % ? r low temperature storage - 65 c for 24 h 0.2 % ? r high temperature exposure 1000 h at +170 c 1.0 % ? r bias humidity +85 c, 85 % rh, 10 % bias, 1000 h 0.5 % ? r mechanical shock 100 g s for 6 ms, 5 pulses 0.2 % ? r vibration frequency varied 10 hz to 2000 hz in 1 min, 3 directions, 12 h 0.2 % ? r load life 1000 h at +70 c, 1.5 h on, 0.5 h off 1.0 % ? r moisture resistance mil-std- 202, method 106, 0 % power, 7b not required 0.2 % ? r
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