CPW, CPWn vishay dale www.vishay.com 28 document number 30216 revision 04-sep-02 for technical questions, contact ww2aresistors@vishay .com wirewound resistors, commercial power, axial lead features ? high power to size ratio ? ceramic cases are available with circuit board stand- offs (designated with a -3 model ending) ? superior surge capability ? complete welded construction ? available in non-inductive styles with aryton-perry winding (CPWn in lieu of CPW, maximum resistance is one-half CPW range) ? special inorganic potting compound and ceramic case provide high thermal conductivity in a fireproof package standard electrical specifications model power rating resistance range weight p 40 c ? (typical) w 1%, 2%, 3%, 5% g CPW-2 2 0.1 - 7k 2.0 CPW-2-3 2 0.1 - 7k 2.2 CPW-3 3 0.1 - 7.5k 3.4 CPW-3-3 3 0.1 - 7.5k 3.6 CPW-5 5 0.1 - 8.5k 4.8 CPW-5-3 5 0.1 - 8.5k 5.0 CPW-7 7 0.1 - 18k 6.8 CPW-7-3 7 0.1 - 18k 7.0 CPW-10 10 0.12 - 30k 9.5 CPW-10-3 10 0.12 - 30k 9.9 CPW-15 15 0.12 - 30k 16.8 CPW-15-3 15 0.12 - 30k 17.4 CPW-20 20 0.18 - 45k 22.8 CPW-20-3 20 0.18 - 45k 23.6 technical specifications parameter unit CPW resistor characteristics temperature coefficient ppm/ c 90 below 1.0 ? , 50 for 1.0 ? to 9.9 ? , 30 for 10 ? and above short time overload - 5 x rated power for 5 seconds maximum working voltage v (p x r) 1/2 operating temperature range c - 65/+ 275 terminal strength lb 10 minimum dielectric withstanding voltage v ac 1000 CPW-10-3 model 500 ? resistance ? 5% tolerance % ordering information
www.vishay.com 29 CPW, CPWn vishay dale document number 30216 revision 04-sep-02 for technical questions, contact ww2aresistors@vishay .com dimensions wirewound resistors, commercial power, axial lead material specifications element: copper-nickel alloy or nickel-chrome alloy, depending on resistance value core: ceramic end caps: stainless steel body: steatite ceramic case with inorganic potting compound terminals: tinned copperweld ? part marking: dale, model, wattage, value, tolerance, date code model dimensions in inches [millimeters] a* b c d e 0.031 [0.794] 0.031 [0.794] 0.031 [0.794] 0.031 [0.794] 0.001 [0.025] CPW-2 0.688 [17.46] 0.250 [6.35] 0.250 [6.35] - 0.032 [0.813] CPW-2-3 0.688 [17.46] 0.250 [6.35] 0.250 [6.35] 0.313 [7.94] 0.032 [0.813] CPW-3 0.875 [22.22] 0.313 [7.94] 0.313 [7.94] - 0.032 [0.813] CPW-3-3 0.875 [22.22] 0.313 [7.94] 0.313 [7.94] 0.375 [9.52] 0.032 [0.813] CPW-5 0.875 [22.22] 0.375 [9.52] 0.344 [8.73] - 0.032 [0.813] CPW-5-3 0.875 [22.22] 0.375 [9.52] 0.344 [8.73] 0.406 [10.32] 0.032 [0.813] CPW-7 1.391 [35.32] 0.375 [9.52] 0.344 [8.73] - 0.032 [0.813] CPW-7-3 1.391 [35.32] 0.375 [9.52] 0.344 [8.73] 0.469 [11.91] 0.032 [0.813] CPW-10 1.875 [47.62] 0.375 [9.52] 0.344 [8.73] - 0.032 [0.813] CPW-10-3 1.875 [47.62] 0.375 [9.52] 0.344 [8.73] 0.469 [11.91] 0.032 [0.813] CPW-15 1.875 [47.62] 0.500 [12.70] 0.500 [12.70] - 0.032 [0.813] CPW-15-3 1.875 [47.62] 0.500 [12.70] 0.500 [12.70] 0.625 [15.87] 0.032 [0.813] CPW-20 2.500[63.50] 0.500 [12.70] 0.500 [12.70] - 0.032 [0.813] CPW-20-3 2.500 [63.50] 0.500 [12.70] 0.500 [12.70] 0.625 [15.87] 0.032 [0.813] derating performance test conditions of test test limits (eia rs-344) thermal shock - 55 c to + 275 c, 5 cycles, 30 minute dwell time (2.0% + 0.05 ? ) ? r short time overload 5 x rated power for 5 seconds (2.0% + 0.05 ? ) ? r dielectric withstanding voltage 1000v rms for one minute (0.1% + 0.05 ? ) ? r low temperature operation - 65 c, full rated working voltage for 45 minutes (2.0% + 0.05 ? ) ? r bias humidity 75 c, 90% - 100% rh, 240 hours (2.0% + 0.05 ? ) ? r load life 1000 hours at rated power, + 40 c, 1.5 hours on, 0.5 hours off (3.0% + 0.05 ? ) ? r terminal strength 5 to 10 second 10 pound pull test, torsion test - 3 alternating directions, 360 each (1.0% + 0.05 ? ) ? r resistance to solder heat t erminal immersed 3.5 seconds in molten solder at 1/8" to 3/16" from body (1.0% + 0.05 ? ) ? r *potting compound may extend outside of ceramic case up to 0.060 [1.52] maximum per side. CPW-x c b a 1.0 [25.4] minimum e 0.125 [3.18] typical b CPW-x-3 a 1.0 [25.4] minimum c d e rated power in % -65 -25 25 75 125 175 225 275 ambient temperature in c 120 100 80 60 40 20 0 40
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