pwr220/pwr221 f series power resistors features to220 or to221 housing low inductance smd and through hole versions high power rating applications power supplies motor drives test and measurement welding general information the bourns pwr220 f series is a to220 style power resistor; pwr221 f is a to221 style power resistor. manufactured using thick film on alumina ceramic technology, it is used in applications such as power supplies, motor drives and measurements. electrical & thermal characteristics parameter symbol min. nom. max. unit resistance (version a & b) r 0.02 100k (version c) r 0.02 15k power rating @ 70 ? without heat sink 1.50 w power rating @ 70 ? with heat sink (version a & b) 30 w (version c) 50 w tolerance 0.02 < r < 1.0 2.05.0% 1.0 < r < 100k 1.05.0% tcr 0.1 < r < 100.0k 100 ppm/c 0.05 < r < 0.099 300 ppm/c 0.02 < r < 0.049 600 ppm/c thermal resistance ?rthj (version a & b) 3.5 c/w (version c) 2.1 c/w stability 0.1 0.5 % thermal emf 1.0 v/? dielectric withstanding voltage 2 kv dc operating temperature t j -40 +130 ? *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. material specifications resistor ..........................................thick film substrate...........................alumina (al203) housing.....................................epoxy/pps lead frame ............tinned copper (sn/cu) maximum torque .............................1.0 nm packaging tubes....................................50 pcs./tube tape & reel..........................500 pcs./reel *rohs compliant
specifications are subject to change without notice. customers should verify actual device performance in their specific applications. product dimensions pwr220/pwr221 f series power resistors how to order pwr 220 - 2 f b r040 j e model pwr = power resistor package 220 = to220 221 = to221 number of pins 2 = 2 function f = thick film version a = surface mount 30 w (with heat sink) b = through-hole 30 w (with heat sink) c = through-hole 50 w (with heat sink) resistor value for all tolerances <100 ohms ....??represents decimal point (examples: 7r50 = 7.5 ohms; r040 = 0.040 ohms) 100 ohms ....first three digits are significant, fourth digit represents number of zeros to follow (examples: 2000 = 200 ohms; 2002 = 20k ohms) absolute tolerance j = 5 % g = 2 % f = 1 % packaging e = tape & reel ___ = tubes typical part marking pwr220-2f r500 1% 0512 manufacturer's trademark part identification absolute resistance, tolerance date code: yyww 10.16 (0.4) to220 housing: 2-pin 3.7 (0.15) 4.0 (0.16) 6.0 (0.24) 17.3 (0.68) 27.3 (1.07) 14.4 (0.57) 16.4 (0.65) 1.3 (0.05) 1.2 (0.05) 1.85 (0.07) 0.4 (0.015) 0.76 (0.03) 5.08 (0.2) measuring point to220 casing: 2-pin (surface mount) 10.16 (0.4) 14.6 (0.57) 15.0 (0.59) 17.33 (0.68) 12.7 (0.50) 0.76 (0.03) 1.4 (0.06) 4.0 (0.16) 1.2 (0.05) millimeters (inches) dimensions = to221 casing: 2-pin 10.16 (0.4) 3.2 (0.13) 3.7 (0.15) 4.0 (0.16) 18.3 (0.72) 28.3 (1.11) 14.4 (0.57) 16.4 (0.65) 1.3 (0.05) 1.2 (0.05) 1.85 (0.07) 0.4 (0.015) 0.76 (0.03) measuring point 5.08 (0.2)
pwr220/pwr221 f series power resistors specifications are subject to change without notice. customers should verify actual device performance in their specific applications. rev. 12/14/07 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 devices are packed in accordance with eia standard rs-481-a and specifications shown here. mm (inches) dimensions: item symbol dimensions carrier width a 10.4 (0.409) carrier length b 18.4 (0.724) carrier depth c 4.4 (0.173) reel outside diameter d 330 (12.992) punch hole pitch p 16.00 (0.630) tape width w 32 (1.260) quantity per reel 500 packaging dimensions ....... ....... ....... ....... ....... ....... ....... ....... p a 120 d c index hole w b 10 pitches (min.) direction of feed 10 pitches (min.) end trailer device leader start
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