features to220 or to221 housing low inductance smd and through hole versions high power rating applications power supplies motor drives test and measurement welding pwr220/pwr221 f series power resistors *rohs directive 2002/95/ec jan 27 2003 including annex. speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. general information the bourns ? pwr220 f series is a to220 style power resistor; pwr221 f is a to221 style power resistor. manufactured using thick ? lm on alumina ceramic technology, it is used in applications such as power supplies, motor drives and measurements. material speci cations resistor .................................. thick ? lm 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 **tape & reel is only available for versions a and d. electrical & thermal characteristics parameter symbol min. nom. max. unit resistance (version a & b) (version c & d) r r 0.02 0.02 100k 15k power rating @ 70 c in free air power rating with external heat sink (version a & b) (version c & d) 1.50 30 50 w w w tolerance 0.02 < r < 1.0 1.0 < r < 100k 2.0 1.0 5.0 5.0 % % tcr 0.1 < r < 100.0k 0.05 < r < 0.099 0.02 < r < 0.049 100 300 600 ppm/c ppm/c ppm/c thermal resistance ? rthj (version a & b) (version c & d) 3.5 2.1 c/w c/w stability 0.5 % dielectric withstanding voltage 2 kv dc operating temperature t j -40 +155 c *rohs compliant
speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. 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 = to220 housing, surface mount, 30 w (w/heat sink) b = to220 housing/to221 housing, through-hole, 30 w (w/heat sink) c = to220 housing/to221 housing, through-hole, 50 w (w/heat sink) d = to220 housing, surface mount, 50 w (w/heat sink) resistor value for all tolerances <100 ohms ..... ?r? represents decimal point (examples: 7r50 = 7.5 ohms; r040 = 0.040 ohms) 100 ohms ..... first three digits are signi? cant, 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 (available only for versions a and d) ___ = tubes product dimensions 10.16 (0.4) t o 220 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 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) 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) 11.16 (0.439) 18.33 (0.722) 12.10 (0.476) 3.20 (0.126) 5.08 (0.200) 1.76 (0.069) recommended pad layout dimensions: mm (inches) typical part marking pwr220-2f r500 1% 0512 manufacturer's trademark part identification absolute resistance, tolerance date code: yyww
rev. 09/10 speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. pwr220/pwr221 f series power resistors soldering pro le (surface mount version only) derating curve 50 100 150 200 250 temperature (c) 90 30 seconds pre-heating zone 150 c 230 c or higher peak 260 +5/-0 c 180 c 30 10 seconds heating time soldering zone temperature of heat sink (c) 50 85 100 115 130 155 145 120 100 80 60 40 20 0 25 power ratio (%) 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 dimensions: mm (inches) devices are packed in accordance with eia standard rs-481-a and speci cations shown here. 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
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