power metal strip ? resistors, low value (down to 0.001 ), surface mount www.vishay.com for technical questions, contact: ww2bresistors@vishay.com document number: 30101 30 revision: 01-jul-09 wsr vishay dale features ? molded high temperature encapsulation ? ideal for all types of current sensing, voltage division and pulse applications including switching and linear power supplies, instruments, power amplifiers ? proprietary processing technique produces extremely low resistance values (down to 0.001 ) ? all welded construction ? solid metal nickel-chrome or manganese-copper alloy resistive element with low tcr (< 20 ppm/c) ? solderable terminations ? very low inductance 0.5 nh to 5 nh ? excellent frequency response to 50 mhz ? low thermal emf (< 3 v/c) ? compliant to rohs directive 2002/95/ec note (1) the wsr3 requires a minimum of 1050 sq. mil. circ uit traces connecting to the recommended solder pad ? part marking: dale, model, value, tolerance, date code * pb containing terminations are not rohs compliant, exemptions may apply ** please see document ?vishay material category policy?: www.vishay.com/doc?99902 standard electrical specifications global model size power rating p 70 c w resistance range 0.5 % 1.0 % wsr2 4527 2.0 0.01 to 1.0 0.001 to 1.0 wsr3 4527 3.0 (1) 0.01 to 0.2 0.001 to 0.2 technical specifications parameter unit wsr2 & wsr3 temperature coefficient ppm/c 0.005 to 0.0099 = 110 0.010 to 1.0 = 75 dielectric withstanding voltage v ac > 500 insulation resistance > 10 9 operating temperature range c - 65 to + 275 maximum working voltage v ( p x r ) 1/2 weight/1000 pieces (typical) g 440 global model v alue tolera n ce packagi n g wsr2 wsr3 l = m * d = 0.5 % ea = lead (p b )-free, tape/reel r = decimal f = 1.0 % ek = lead (p b )-free, bu lk 5l000 = 0.005 j = 5.0 % ta = tin/lead, tape/reel (r86) r0100 = 0.01 ba = tin/lead, bu lk (b43) global part number information wsr2 0.005 1 % r86 historical model resista n ce v alue tolera n ce code packagi n g special (dash nu m b er) (up to 2 digits) from 1 to 99 as applica b le ws r2 5 l 0 0 0 f t a * use ? l ? for resistance v al u es < 0.01 new global part numbering: wsr25l000fta (preferred part numbering format) historical part number example: wsr2 0.005 1 % r86 (will continue to be accepted)
wsr power metal strip ? resistors, low value (down to 0.001 ), surface mount vishay dale document number: 30101 for technical questions, contact: ww2bresistors@vishay.com www.vishay.com revision: 01-jul-09 31 dimensions note ? embossed carrier tape per eia-4 8 1-2 model dimensions in inches [millimeters] lhtw w 1 wsr2 wsr3 0.455 0.032 [11.56 0. 8 13] 0.095 0.005 [2.41 0.127] 0.100 0.010 [2.54 0.254] 0.275 0.005 [6.9 8 0.127] 0.215 0.005 [5.46 0.127] model solder pad dimensions in inches [millimeters] abl wsr2 wsr3 0.155 [3.94] 0.230 [5. 8 4] 0.205 [5.21] w l t w 1 h i a b performance test conditions of test test limits wsr2 wsr3 thermal shock - 55 c to + 150 c, 1000 cycles, 15 min at each extreme (0.5 % + 0.0005 ) r (0.5 % + 0.0005 ) r short time overload wsr2: 5 x rated power for 5 s wsr3: 4 x rated power for 5 s (0.5 % + 0.0005 ) r (2.0 % + 0.0005 ) r low temperature storage - 65 c for 24 h (0.5 % + 0.0005 ) r (0.5 % + 0.0005 ) r high temperature exposure 1000 h at + 275 c (1.0 % + 0.0005 ) r (1.0 % + 0.0005 ) r bias humidity + 8 5 c, 8 5 % rh, 10 % bias, 1000 h (0.5 % + 0.0005 ) r (0.5 % + 0.0005 ) r mechanical shock 100 g?s for 6 ms, 5 pulses (0.5 % + 0.0005 ) r (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 (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 (2.0 % + 0.0005 ) r resistance to solder heat + 260 c solder, 10 s to 12 s dwell, 25 mm/s emergence (0.5 % + 0.0005 ) r (0.5 % + 0.0005 ) r moisture resistance mil-std-202 method 106, 0 % power, 7a and 7b not required (0.5 % + 0.0005 ) r (0.5 % + 0.0005 ) r packaging model reel tape width diameter pieces/reel code wsr2 and wsr3 24 mm/embossed plastic 330 mm/13" 1500 ea derating - 65 - 25 25 75 125 175 225 275 ambient temperature c 70 0 20 40 60 80 100 120 rated power in %
document number: 91000 www.vishay.com revision: 18-jul-08 1 disclaimer legal disclaimer notice vishay all product specifications and data are subject to change without notice. vishay intertechnology, inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, ?vishay?), disclaim any and all liability fo r any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. vishay disclaims any and all li ability arising out of the use or application of any product describ ed herein or of any information provided herein to the maximum extent permit ted by law. the product specifications do not expand or otherwise modify vishay?s terms and conditions of purcha se, including but not limited to the warranty expressed therein, which apply to these products. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of vishay. the products shown herein are not designed for use in medi cal, life-saving, or life-sustaining applications unless otherwise expressly indicated. customers using or selling vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify vishay for any damages arising or resulting from such use or sale. please contact authorized vishay personnel to obtain written terms and conditions regarding products designed for such applications. product names and markings noted herein may be trademarks of their respective owners.
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