general purpose fuses general purpose fuses 33 w w w . l i t t e l f u s e . c o m ? 2005 littelfuse ? powr-gard ? products catalog littelfuse flnr/flsr series fuses have been the superior ul class rk5 dual-element time-delay fuses, and are the most widely used class of fuses. flnr/flsr series fuses provide excellent protection for all types of circuits especially those containing motors. however, users and specifiers should consider the significant benefits offered by indicator fuses. complete information on these fuses may be found earlier in this section. applications service entrance switches switchboard main and feeder switches motor control center mains and motor branch circuits individual fused combination motor controllers distribution panelboards industrial control panels protection of fully rated panelboards and loadcenters all general purpose circuits safety ? 200,000 a.i.r. reliable interruption of all overcurrents up to 200,000 amperes. ? faster acting short-circuit protection than any non-current-limiting mechanical protective device. reliability ? accurate and reliable automated, precision manufactured and assembled parts ensure accurate, consistent response to overloads and short-circuits. longer equipment life ? reduced damage to equipment caused by heating and magnetic forces of short-circuits. ? equipment runs cooler with low-resistance dual-element fuses. flnr/flsr class rk5 fuses 250/600 vac ? dual-element, time-delay ? 1/10 C 600 amperes specifications voltage ratings: ac: 250 volts (flnr) 600 volts (flsr) dc: 125 volts (flnr) 300 volts (flsr) interrupting ratings: ac: 200,000 a m peres r m s sy mm etrical dc: 20,000 a m peres ampere range: 1 ? 10 C 600 a m peres approvals: standard 248-12, class rk5 ul listed (file no: e81895) csa certified (file no: lr29862) msha 300 volt listing (flsr) qpl: federal specification wf-1814 dimensions refer to flnr_id series for flnr di m ensions and flsr_id series for flsr di m ensions. ampere ratings 1 ? 10 6 ? 10 1 8 ? 10 4 8 30 80 225 1 ? 8 8 ? 10 2 4 1 ? 2 9 35 90 250 15 ? 100 1 2 1 ? 4 5 10 40 100 300 2 ? 10 1 1 ? 8 2 1 ? 2 5 6 ? 10 12 45 110 350 1 ? 4 1 1 ? 4 2 8 ? 10 6 15 50 125 400 3 ? 10 ** 1 4 ? 10 3 6 1 ? 4 17 1 ? 2 60 150 450 4 ? 10 1 1 ? 2 3 2 ? 10 7 20 70 175 500 1 ? 2 1 6 ? 10 3 1 ? 2 7 1 ? 2 25 75 200 600 **flnr only, e x ample part nu m ber (series & ampe r age): flsr100 recommended fuse blocks lr250 series (for flnr series fuses) lr600 series (for flsr series fuses) refer to blocks & holders section of this catalog for a d d i tio n al i n fo rma tion.
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