powr-pro ? fuses powr-pro ? fuses w w w . l i t t e l f u s e . c o m ? 2005 littelfuse ? powr-gard ? products catalog llnrk/llsrk series powr-pro ? class rk1 fuses 250/600 vac ? dual-element, time-delay ? 1/10 C 600 amperes littelfuse llnrk and llsrk series powr-pro fuses provide superior ove r load and short-circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. llnrk/llsrk series fuses can be installed in existing class h fuse blocks to upgrade systems containing lower i n te r rup t ing rating class h one-time or renewable fuses. applications all general purpose circuits motors transformers solenoids fluorescent lighting all system components with high in-rush currents features/benefits ? extremely current-limiting reduces damage to circuits and equipment under short-circuit conditions. stops damaging short- circuits faster than any mechanical protective device. ? 300ka interrupting rating littelfuse self-certified to 300,000 a m peres as standard. meets future trend towards higher available short-circuit currents. ? reduced costs current-limiting design often permits use of readily available, less costly equipment. low resistance design reduces power co n sum p tion and utility bills. ? excellent time-delay true dual-element construction, with se pa rate non-fatiguing thermally-reversible spring-loaded thermal overload element, withstands repeated surges within rated time delay without opening needlessly. eliminates needless downtime caused by power surges or equipment demands. specifications voltage ratings: ac: 250 volts (llnrk) 600 volts (llsrk) dc: 125 volts (llnrk) 300 volts (llsrk) interrupting ratings: ac: 200,000 a m peres rms sy m me t r i cal 300,000 amperes rms sy m me t r i cal (littelfuse self-certified) dc: 20,000 amperes ampere range: 1/10 C 600 amperes approvals: ac: standard 248-12, class rk1 ul listed (file no: e81895) csa certified (file no: lr29862) qpl: federal specification no. wf-1814 dc: littelfuse self-certified ampere ratings 1 ? 10 1 2 8 ? 10 6 1 ? 4 25 80 250 15 ? 100 1 1 ? 8 3 7 30 90 300 2 ? 10 1 1 ? 4 3 2 ? 10 8 35 100 350 1 ? 4 * 1 4 ? 10 3 1 ? 2 9 40 110 400 3 ? 10 1 6 ? 10 4 10 45 125 450 4 ? 10 1 8 ? 10 4 1 ? 2 12 50 150 500 1 ? 2 2 5 15 60 175 600 6 ? 10 2 1 ? 4 5 6 ? 10 17 1 ? 2 70 200 8 ? 10 2 1 ? 2 6 20 75* 225 * llsrk only. example part number (series & amperage): llnrk 450. for online ordering, use numbers lnrk and lsrk for llnrk/llsrk. recommended fuse blocks lr250 series (llnrk series) lr600 series (llsrk series) refer to the blocks & holders section of this catalog for a d d i tio n al i n fo r m a tion.
powr-pro ? fuses 5 powr-pro ? fuses w w w . l i t t e l f u s e . c o m ? 2005 littelfuse ? powr-gard ? products catalog llnrk/llsrk series powr-pro ? class rk1 fuses 250/600 vac ? dual-element, time-delay ? 1/10 C 600 amperes a f e c d g b a j k h b c f d g 70-600a fig. 1 fig. 2 e 1000 800 600 400 300 200 100 80 60 40 30 20 10 8 6 4 3 2 1 .8 .6 .4 .3 .2 .1 .0 8 .0 6 .0 4 .0 3 .0 2 .0 1 200 300 400 600 800 1000 2000 3000 4000 6000 8000 10000 20000 30000 40000 60000 80000 100000 8 10 20 30 40 60 80 100 5 15a 30a 60a 100a 200a 400a 600a time in second s current in amperes 568003 1000 800 600 400 300 200 100 80 60 40 30 20 10 8 6 4 3 2 1 .8 .6 .4 .3 .2 .1 .0 8 .0 6 .0 4 .0 3 .0 2 .0 1 200 300 400 600 800 1000 2000 3000 4000 6000 8000 10000 20000 30000 40000 60000 80000 100000 8 10 20 30 40 60 80 100 5 15a 30a 60a 100a 200a 400a 600a time in second s current in amperes 569003 llnrk llsrk amperes refer to fig. no. series dimensions in inches (mm in parentheses) a b c d e f g h j k 1/10 C 30 1 llnrk 2 (50.8) 1 ? 2 (12.7) 1 ? 2 (12.7) 9 ? 16 (14.3) 5 ? 64 (2.0) 5 ? 32 (4.0) 3 ? 8 (9.5) llsrk 5 (127.0) 3 ? 4 (19.1) 5 ? 8 (15.9) 3 ? 16 (20.6) 3 ? 32 (2.4) 3 ? 16 (4.8) 5 ? 8 (15.9) 35 C 60 1 llnrk 3 (76.2) 3 ? 4 (19.1) 5 ? 8 (15.9) 3 ? 16 (20.6) 3 ? 32 (2.4) 3 ? 16 (4.8) 5 ? 8 15.9) llsrk 5 1 ? 2 (139.7) 1 (25.4) 5 ? 8 (15.9) 1 1 ? 16 (27.0) 3 ? 32 (2.4) 1 ? 4 (6.4) 7 ? 8 (22.2) 70 C 100 2 llnrk 5 7 ? 8 (149.2) 1 (25.4) 1 1 ? 16 (27.0) 1 1 ? 16 (27.0) 1 ? 8 (3.2) 3 ? 4 (19.1) 1 1 ? 4 (31.8) 1 ? 4 (6.4) 9 ? 32 (7.1) 1 ? 2 (12.7) llsrk 7 7 ? 8 (200.0) 1 1 ? 4 (31.8) 1 1 ? 16 (27.0) 1 5 ? 16 (33.3) 1 ? 8 (3.2) 3 ? 4 (19.1) 1 1 ? 2 (38.1) 1 ? 4 (6.4) 9 ? 32 (7.1) 1 ? 2 (12.7) 110 C 200 2 llnrk 7 1 ? 8 (181.0) 1 1 ? 2 (38.1) 1 15 ? 32 (37.3) 1 19 ? 32 (40.5) 3 ? 16 (4.8) 1 1 ? 8 (28.6) 1 27 ? 32 (46.8) 7 ? 16 (11.1) 9 ? 32 (7.1) 11 ? 16 (17.5) llsrk 9 5 ? 8 (244.5) 1 3 ? 4 (44.5) 1 15 ? 32 (37.3) 1 27 ? 32 (46.8) 3 ? 16 (4.8) 1 1 ? 8 (28.6) 2 3 ? 32 (53.2) 7 ? 16 (11.1) 9 ? 32 (7.1) 11 ? 16 (17.5) 225 C 400 2 llnrk 8 5 ? 8 (219.1) 2 (50.8) 1 15 ? 16 (49.2) 2 3 ? 32 (53.2) 1 ? 4 (6.4) 1 5 ? 8 (41.3) 2 11 ? 32 (59.5) 5 ? 8 (15.9) 13 ? 32 (10.3) 15 ? 16 (23.8) llsrk 11 5 ? 8 (295.3) 2 1 ? 2 (63.5) 2 (50.8) 2 19 ? 32 (65.9) 1 ? 4 (6.4) 1 5 ? 8 (41.3) 2 27 ? 32 (72.2) 5 ? 8 (15.9) 13 ? 32 (10.3) 15 ? 16 (23.8) 450 C 600 2 llnrk 10 3 ? 8 (263.5) 2 1 ? 2 (63.5) 2 3 ? 8 (60.3) 2 19 ? 32 (65.9) 1 ? 4 (6.4) 2 (50.8) 2 27 ? 32 (72.2) 3 ? 4 (19.1) 17 ? 32 (13.5) 1 1 ? 8 (28.6) llsrk 13 3 ? 8 (339.7) 3 (76.2) 2 13 ? 32 (61.1) 3 3 ? 32 (78.6) 1 ? 4 (6.4) 2 (50.8) 3 11 ? 32 (84.9) 3 ? 4 (19.1) 17 ? 32 (13.5) 1 1 ? 8 (28.6)
powr-pro ? fuses powr-pro ? fuses w w w . l i t t e l f u s e . c o m ? 2005 littelfuse ? powr-gard ? products catalog llnrk/llsrk series powr-pro ? class rk1 fuses 250/600 vac ? dual-element, time-delay ? 1/10 C 600 amperes current-limiting effects of llsrk (600v) fuses 2000 3000 4000 6000 8000 10000 20000 30000 40000 60000 80000 100000 200000 10 0 20 0 30 0 40 0 60 0 80 0 1000 10 0 20 0 30 0 40 0 60 0 80 0 1000 2000 3000 4000 6000 8000 1000 0 2000 0 3000 0 4000 0 6000 0 8000 0 100000 200000 300000 400000 600000 800000 1000000 600a 400a 200a 100a 60 a 30a peak le t- thru in amperes av ailable fa ul t curren t symmetrical r. m. s. amperes 05569003 2000 3000 4000 6000 8000 1000 0 2000 0 3000 0 4000 0 6000 0 8000 0 100000 200000 10 0 20 0 30 0 40 0 60 0 80 0 1000 10 0 20 0 30 0 40 0 60 0 80 0 1000 2000 3000 4000 6000 8000 1000 0 2000 0 3000 0 4000 0 6000 0 8000 0 100000 200000 300000 400000 600000 800000 1000000 600a 400a 200a 100a 60a 30 a peak le t- thru in amperes av ailable fa ul t curren t symmetrical r. m. s. amperes 05568003 current-limiting effects of llnrk (250v) fuses llnrk llsrk short circuit current* apparent rms sy m me t r i cal for various fuse ratings 30a 0a 00a 00a 00a 00a 5,000 1,060 1,600 2,100 2,600 4,100 0,000 1,350 2,000 2,800 3,400 5,250 8,000 5,000 1,600 2,300 3.200 3,900 6,000 9,000 0,000 1,700 2,600 3,600 4,500 6,700 10,000 5,000 1,900 2,800 3,800 4,800 7,500 11,000 30,000 2,000 3,000 4,100 5,200 8,000 12,000 35,000 2,100 3,100 4,400 5,700 8,500 12,500 0,000 2,200 3,300 4,600 6,000 9,000 13,000 50,000 2,400 3,500 4,900 6,500 9,500 14,000 0,000 2,500 3,800 5,200 7,000 10,000 15,000 0,000 2,700 4,000 5,700 7,750 11,000 17,000 00,000 2,900 4,200 6,200 8,500 12,000 18,000 50,000 3,200 4,600 7,300 10,000 14,000 21,000 00,000 3,300 4,700 8,000 11,000 16,000 23,000 * prospective rms sy m me t r i cal amperes short-circuit current note: data derived from peak let-thru curves short circuit current* apparent rms sy m me t r i cal for various fuse ratings 30a 0a 00a 00a 00a 00a 5,000 900 1,400 2,000 2,700 4,800 5,000 0,000 1,100 1,900 2,700 3,500 6,200 8,500 5,000 1,250 2,100 3,100 4,200 7,000 9,500 0,000 1,400 2,400 3,500 4,600 8,000 10,800 5,000 1,500 2,600 3,900 5,000 8,300 11,500 30,000 1,600 2,800 4,000 5,250 9,000 12,000 35,000 1,700 2,850 4,300 5,500 9,500 12,500 0,000 1,800 3,000 4,600 5,800 9,800 13,500 50,000 1,900 3,200 4,800 6,300 10,200 14,000 0,000 2,000 3,500 5,200 6,700 11,000 15,000 0,000 2,200 3,900 5,700 7,200 12,200 16,000 00,000 2,300 4,000 6,000 8,100 12,700 17,000 50,000 2,500 4,500 6,700 9,100 14,000 19,000 00,000 2,600 4,800 7,000 9,700 15,000 20,000 * prospective rms sy m me t r i cal amperes short-circuit current note: data derived from peak let-thru curves
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