www.vishay.com for technical questions, contact: ww2bresistors@vishay.com document number: 30099 372 revision: 10-dec-10 wsl3637 vishay dale power metal strip ? resistors, low value (down to 0.001 ), surface mount, 4-terminal features ? 4-terminal design allows for 0.5 % resistance tolerance down to 0.001 ? ideal for all types of current sensing, voltage division and pulse applications including switching and linear power supplies, instruments and power amplifiers ? proprietary processing technique produces extremely low resistance values (down to 0.001 ) ? all welded construction ? solid metal nickel-chrome alloy resistive element with low tcr (< 20 ppm/c) ? solderable terminations ? low thermal emf (< 3 v/c) ? very low inductance, 0.5 nh to 5 nh ? excellent frequency response to 50 mhz ? aec-q200 qualified (1) ? compliant to rohs directive 2002/95/ec note (1) flame retardance test may not be a pplicable to some resistor technologies. standard electrical specifications global model size power rating p 70 c w tolerance % resistance value range weight (typical) g/1000 pieces wsl3637 3637 3.0 0.5 and 1.0 0.001 to 0.01 274.3 technical specifications parameter unit resis tor characteristics temperature coefficient ppm/c 75 for 0.001 to 0.0029 , 50 for 0.003 to 0.010 operating temperature range c - 65 to + 170 maximum working voltage v ( p x r ) 1/2 global part number information global part numbering exam ple: wsl36375l000fta (preferr ed part numbering format) global model resistance value tolerance code packaging code special wsl3637 l = m * r = decimal 5l000 = 0.005 r0100 = 0.01 * use l for resistance values < 0.01 d = 0.5 % f = 1.0 % ea = lead (pb)-f ree, tape/reel ek = lead (pb)-free, bulk (dash number) (up to 2 digits) from 1 to 99 as applicable ta = tin/lead, tape/reel (r86) ba = tin/lead, bulk (b43) historical part numberin g example: wsl3637 0.005 1 % r86 (will continue to be accepted) wsl3637 0.005 1 % r86 historical model resistance value tolerance code packaging code * pb containing terminations are not rohs compliant, exemptions may apply ** please see document vishay material category policy: www.vishay. com/doc?99902 w s l 3 6 3 7 5 l 0 0 0 f t a
document number: 30099 for tec hnical questions, contact: ww2bresistors@vishay.com www.vishay.com revision: 10-dec-10 373 wsl3637 power metal strip ? resistors, low value (down to 0.001 ), surface mount, 4-terminal vishay dale dimensions note ? embossed carrier tape per eia-481 . model dimensions in inches (millimeters) resistance range ( ) wl ht ab wsl3637 0.002 to 0.01 0.370 0.010 (9.40 0.254) 0.360 0.010 (9.14 0.254) 0.025 0.010 (0.635 0.254) 0.086 0.010 (2.18 0.254) 0.061 0.010 (1.55 0.254) 0.032 0.010 (0.813 0.254) 0.001 to 0.0019 0.138 0.010 (3.51 0.254) model solder pad dimensions in inches (millimeters) resistance range ( ) abcd l wsl3637 0.002 to 0.01 0.116 (2.95) 0.390 (9.91) 0.066 (1.68) 0.024 (0.610) 0.178 (4.52) 0.001 to 0.0019 0.168 (4.27) 0.390 (9.91) 0.066 (1.68) 0.024 (0.610) 0.074 (1.88) a c b w l t h i d b a performance test conditions of test test limits thermal shock - 55 c to + 150 c, 1000 cycl es, 15 min at each extreme (0.5 % + 0.0005 ) r short time overload 5 x rated power for 5 s (0.5 % + 0.0005 ) r low temperature storage - 65 c for 24 h (0.5 % + 0.0005 ) r high temperature exposure 1000 h at + 170 c (1.0 % + 0.0005 ) r bias humidity + 85 c, 85 % rh, 10 % bias, 1000 h (0.5 % + 0.0005 ) r mechanical shock 100 g s for 6 ms, 5 pulses (0.5 % + 0.0005 ) r vibration frequency varied 10 hz to 2000 hz in 1 min, 3 directions, 12 h (0.5 % + 0.0005 ) r load life 1000 h at rated power, + 70 c, 1.5 h on, 0.5 h off (1.0 % + 0.0005 ) r solder heat + 260 c solder, 10 s to 12 s dw ell, 25 mm/s emergence (0.5 % + 0.0005 ) r moisture resistance mil-std-202, method 106, 0 % power, 7a and 7b not required (0.5 % + 0.0005 ) r packaging model reel tape width diameter pieces/reel code wsl3637 16 mm/embossed plastic 330 mm/13" 4000 ea - 65 - 55 - 25 0 25 50 75 100 125 150 170 120 100 80 60 40 20 0 70 derating ambient temperature in c rated power in %
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