pwr3920 s series power resistor features low tcr (75 ppm/?) high current capability ultra low resistance values applications power supplies motor drives electricity metering general information the bourns pwr3920 series is a surface mount shunt resistor offering up to 3 w of power and very low resistance values as well as excellent tcr characteristics. it is designed for applications such as motor drives and power supplies. electrical characteristics parameter value unit resistance range 0.2, 0.3, 0.5, milliohms 1.0, 2.0. 3.0, 4.0 power rating @ 70 ? 3.0 w tolerance 1, 5 % temperature coefficient (tcr) ?5 ppm/c operating temperature -65 to +170 c maximum operating voltage pxr environmental characteristics description method limit ( ? r) short time overload 5 x rated power for 5 seconds (1.0 % +0.0005 ) high temperature storage 1000 hours at + 175 c (1.0 % +0.0005 ) vibration frequency varied 10 to 2000 hz in 1 minute, 3 directions, 12 hours (0.5 % +0.0005 ) mechanical shock 100 g for 6 milliseconds, 5 pulses (0.5 % +0.0005 ) load life 1000 hours at + 70 ?, 1.5 hours ?n? 0.5 hours ?ff (0.5 % +0.0005 ) bias humidity +85 ?, 85 % rh, 10 % bias, 1000 hours (0.5 % +0.0005 ) resistance to solder heat + 260 ? solder, 10 - 12 second dwell, 25 mm/second (0.5 % +0.0005 ) low temperature storage -65 ? for 45 minutes (0.5 % +0.0005 ) load life ( pxr) for 1000 hours, 1.5 hours ?n? 0.5 hours ?ff (1.0 % +0.0005 ) moisture resistance mil-std-202, method 106, 0 % power, 7a and 7b not required (0.5 % +0.0005 ) resistance to soldering heat 260 ? for 10 seconds (0.5 % +0.0005 ) thermal shock 1000 cycles from -55 ? to +150 ?, 15 minutes at temperature (0.5 % +0.0005 ) *rohs directive 2002/95/ec jan 27 2003, including annex specifications are subject to change without notice. customers should verify actual device performance in their specific applications. *rohs compliant
specifications are subject to change without notice. customers should verify actual device performance in their specific applications. product dimensions pwr3920 s series power resistor 10.0 ?0.254 (0.394 ?0.010) 0.5 (0.020) 2.00 ?0.010 (0.079 ?0.254) 5.20 ?0.254 (0.205 ?0.010) how to order pwr 3920 - 2 s b r0040 j e model pwr = power resistor package 3920 = 0.39 x 0.20 inches number of terminals 2 = 2 function s = shunt version resistor value r (4 digits) absolute tolerance j = 5 % f = 1 % packaging e = tape & reel ___ = bulk copyright?2005, bourns, inc. litho in u.s.a. pwr3920 s 12/05 reliable electronic solutions asia-pacific: tel: +886-2 2562-4117 ?fax: +886-2 2562-4116 europe: tel: +41-41 768 5555 ?fax: +41-41 768 5510 the americas: tel: +1-951 781-5500 ?fax: +1-951 781-5700 www.bourns.com solder pads 2.70 ?0.254 (0.106 ?0.010) 5.60 ?0.13 (0.220 ?0.005) 6.20 ?0.254 (0.244 ?0.010) millimeters (inches) dimensions = packaging specifications tape ..........................................................16 mm/embossed plastic reel ..............................................................330 mm/13 in. diameter pieces per reel ..........................................................................3000
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