protistor dc fuses protistor dc fuses scdc 24 dc square-body fuses sizes 120 to 123 gr 750v dc 12/04 size 122 grc-grd from 250 to 500 a * max. i2t @ 800 v=, l/r=40 ms and breaking capacity = 100 ka @ 750vdc/50ms microswitch: mc 3e 1-5n ref. number: d310020 250 315 350 400 450 500* 250 315 350 400 450 500* cc 7,5 grc 122 ef 0250 cc 7,5 grc 122 ef 0315 cc 7,5 grc 122 ef 0350 cc 7,5 grc 122 ef 0400 cc 7,5 grd 122 ef 0450 cc 7,5 grd 122 ef 0500* cc 7,5 grc 122 ttf 0250 cc 7,5 grc 122 ttf 0315 cc 7,5 grc 122 ttf 0350 cc 7,5 grc 122 ttf 0400 cc 7,5 grd 122 ttf 0450 cc 7,5 grd 122 ttf 0500* breaking capacity a087331 b087332 w221141 l089388 p220951 q220952 b090437 m085249 g220898 c090438 r220953 s220954 watts loss 0.8 i n i n (w) (w) 25.5 31.5 35 40.5 49 52 25.5 31.5 35 40.5 49 52 46.7 58 64.5 74.5 90 95 46.7 58 64.5 74.5 90 95 size current rating i n ( a ) designation d122gc75v250ef d122gc75v315ef d122gc75v350ef d122gc75v400ef D122GD75V450EF d122gd75v500ef d122gc75v250tf d122gc75v315tf d122gc75v350tf d122gc75v400tf d122gd75v450tf d122gd75v500tf catalog number ref. number main characteristics 1.25 10 6 2 10 6 2.5 10 6 3.1 10 6 4 10 6 6.2 10 6 * 1.25 10 6 2 10 6 2.5 10 6 3.1 10 6 4 10 6 6.2 10 6 * 250,000 400,000 500,000 600,000 800,000 1.2 10 6 * 250,000 400,000 500,000 600,000 800,000 1.2 10 6 * weight: 1300 g weight: 1150 g pack: 1 piece max. i 2 t @ 900 v = l/r 40 ms ip = 10 i n p = 50 i n (a 2 s) (a 2 s) 122 @750 v dc 100 ka l/r = 100 ms @ 900 v dc 100 ka l/r = 40 ms dimensions
dc square-body fuses sizes 120 to 123 gr 750v dc scdc 25 protistor dc fuses protistor dc fuses 12/04 size 122 grc-grd from 250 to 500 a dc applications data electrical characteristics peak arc voltage vs. working voltage l/r (ms) u (v) 500 600 700 800 900 1000 1100 90 80 70 60 50 40 30 20 10 0 above: curves indicate maximum permissible value of time cons- tant l/r as a function of dc working voltage 1: l/r = 100 ms 2: l/r = 40 ms 1: curve grc - grd 450a 2: curve grd 500a max. ac voltage (50/60 hz): 1250 v with breaking capacity of 170 ka um(v) u (v) 0 200 400 600 800 1000 2400 2000 1600 1200 800 400 0 1 1 2 2 above: curves indicate for various time constants l/r the peak arc voltage which may appear across fuse terminals, vs. dc working voltage above: curves indicate, for each rated current, pre-arcing time vs. r.m.s. pre-arcing current. t (s) t (s) i (a) 10 2 10 3 10 4 10 5 10 2 10 3 10 4 10 5 10 4 10 3 10 2 10 1 10 -1 10 -2 10 -3 10 -4 250 315 350 400 450 500 a= 130 a2=0.6 b1= 1.25 b2= 0.6 cf3= 0.8 a= 130 a2=0.6 b1= 1.25 b2= 0.6 cf3= 0.8 7% tolerance for mean pre-arcing current i (a) grc grd time vs. current characteristics 10 4 10 3 10 2 10 1 10 -1 10 -2 10 -3 10 -4
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