WSLS2512, improved stability www.vishay.com vishay dale revision: 05-mar-14 1 document number: 30123 for technical questions, contact: ww2bresistors@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 ? resistors, improved stability (0.25 % and 0.5 %), low value, surface mount features ? current sensing in high-temperature (+ 125 c) applications ? greater stability with maximum resistance change of 0.25 % or 0.5 % through 2000 h workload ? ideal for all types of current sensing, voltage division and pulse applications including switching and linear power supplies, instruments, power amplifiers and shunts ? proprietary processing technique produces extremely low resistance values (0.01 ? to 0.1 ? ) ? all welded construction ? solid metal nickel-chrome resistive element with low tcr (< 20 ppm/c) ? very low inductance 0.5 neh to 2 nh ? excellent frequency response to 50 mhz ? low thermal emf (< 3 v/c) ? aec-q200 qualified (1) ? material categorization: for definitions of compliance please see www.vishay.com/doc?99912 note (1) flame retardance test may not be applicable to some resistor technologies. note ? part marking: value, rtc/stability code. standard electrical specifications global model size power rating p 70 c w tolerance % resistance value range ? weight (typical) g/1000 pieces WSLS2512 2512 1.0 0.5, 1.0, 5.0 0.01 to 0.1 63.6 technical specifications parameter unit resistor characteristics temperature coefficient ppm/c 75 element tcr ppm/c < 20 operating temperature range c - 65 to + 170 maximum working voltage v ( p x r ) 1/2 global part number information global part numbering example: WSLS2512r0100fhea global model resistance value tolerance code rtc/stability packaging code special WSLS2512 r = decimal r0100 = 0.01 ? d = 0.5 % f = 1.0 % j = 5.0 % g = 75 ppm, 0.25 % stability h = 75 ppm, 0.5 % stability ea = lead (pb)-free, tape/reel ek = lead (pb)-free, bulk (dash number) (up to 2 digits) from 1 to 99 as applicable s l s 2 5 1 2 r 0 1 0 0 f h w e a
WSLS2512, improved stability www.vishay.com vishay dale revision: 05-mar-14 2 document number: 30123 for technical questions, contact: ww2bresistors@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 ? embossed carrier tape per eia-481 . model dimensions solder pad dimensions l w h t a b l WSLS2512 0.250 0.010 (6.35 0.254) 0.125 0.010 (3.18 0.254) 0.025 0.010 (0.635 0.254) 0.030 0.010 (0.762 0.254) 0.065 (1.65) 0.145 (3.68) 0.160 (4.06) performance test conditions of test test limits 0.25 % 0.5 % thermal shock - 55 c to + 150 c, 1000 cycles, 15 min at each extreme (0.5 % + 0.005 ? ) ? r short time overload 5 x rated power for 5 s fo r wsl2512 size or smaller (0.5 % + 0.005 ? ) ? r low temperature operation - 65 c for 45 min (0.5 % + 0.005 ? ) ? r high temperature exposure 1000 h at + 170 c (1.0 % + 0.005 ? ) ? r bias humidity + 85 c, 85 % rh, 10 % bias, 1000 h (0.5 % + 0.005 ? ) ? r mechanical shock 100 g s for 6 ms, 5 pulses (0.5 % + 0.005 ? ) ? r vibration frequency varied 10 hz to 2000 hz in 1 min, 3 directions, 12 h (0.5 % + 0.005 ? ) ? r load life 2000 h at 70 c, 1.5 h on, 0.5 h off 0.25 % ? r 0.5 % ? r resistance to solder heat + 260 c solder, 10 s to 12 s dwell, 25 mm/s emergence (0.5 % + 0.005 ? ) ? r moisture resistance mil-std-202, method 106, 0 % power, 7b not required (0.5 % + 0.005 ? ) ? r l t w h l b a typical sensing traces 70 120 100 80 60 40 20 0 170 150 125 100 75 50 25 0 - 25 - 50 - 65 ambient temperature in c rated power in % packaging model reel tape width diameter pieces/reel code WSLS2512 12 mm/embossed plastic 178 mm/7" 2000 ea
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