semi-precision power wirewound resistors PPW series ideal for pulse and surge applications 2 watts to 15 watts resistance to 0r1 ohms to 5k ohms ?%, ?% or ?% tolerance ?0 ppm/? tcr resistive range ohms 10 x 1000* 10 x 360* 1r to 9r9 250v 650v 10r to 29r9 500v 850v 30r to 99r 600v 1000v 100r to 1k6 1000v 1500v general note welwyn components reserves the right to make changes in product specification without notice or liability. all information is subject to welwyn s own data and is considered accurate at time of going to print. ?welwyn components limited ?bedlington, northumberland ne22 7aa, uk telephone: +44 (0) 1670 822181 ?facsimile: +44 (0) 1670 829465 ?email: info@welwyn-tt.com ?website: www.welwyn-tt.com 115 PPW-2 PPW-3 PPW-5 PPW-7 PPW-10 PPW-15 power rating at 25? watts 2 3 5 7 10 15 resistance range ohms 0r1 to 1k6 0r1 to 1k6 0r1 to 1k6 0r1 to 2k5 0r1 to 5k 0r1 to 5k electrical data lighting surge capabilities for PPW-2 issue b ?03.02 a subsidiary of tt electronics plc welwyn components please note: when ordering the alternate configuration please add an ??after the part number (ie. PPW-3a) 1000v 500v 1000 volts 10x360 sec 1000 2000 3000 600v 300v 600 volts 10x1000 sec 1000 2000 3000 *10 microseconds ?maximum rise time to peak voltage. 360 or 1000 microseconds - minimum decay time to one half peak.
dimensions (mm) semi-precision power wirewound resistors PPW series ? welwyn components limited bedlington, northumberland ne22 7aa, uk telephone: +44 (0) 1670 822181 ?facsimile: +44 (0) 1670 829465 ?email: info@welwyn-tt.com ?website: www.welwyn-tt.com 116 issue b ?03.02
physical data 250 200 150 100 50 0 0 20406080100120 hot spot temperature ( c) % rated load PPW-15 PPW-10 PPW-7 PPW-5 PPW-3 PPW-2 100 80 60 150 40 20 0 0 50 100 150 200 250 % rated load ambient temperature ( c) PPW-2 PPW-15 PPW-3, 5, 7, 10 25 40 65 max. recommended ambient operating temperature 150 c power derating temperature rise l 3.17 max. d w h 25.4 min e e standard configuration alternate configuration type l 0.8 w 0.8 h 0.8 d dia. e 0.8 PPW-2 1705 6.99 6.99 0.8 8.134 PPW-3 22.3 7.87 7.87 0.8 9.65 PPW-5 22.3 9.65 8.89 0.8 10.4 PPW-7 35.3 9.65 8.89 0.8 11.9 PPW-10 47.7 9.65 8.89 0.8 11.9 PPW-15 47.7 12.7 12.7 0.8 12.7
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