37 general purpose fuses jls class j fuses 600 vac fast-acting 1 600 amperes specifications voltage ratings: 600 volts ac interrupting ratings: 200,000 amperes rms symmetrical ampere range: 1 600 amperes approvals: ul listed class j fuses per ul 248 (formerly ul 198c) (file no. e81895) csa certified hrci-j (file no. lr29862) federal specification no. wf1814 (qpl) ampere ratings 1 25 60 125 300 3 30 70 150 350 6 35 80 175 400 10 40 90 200 450 15 45 100 225 500 20 50 110 250 600 example part number (series & amperage): jls 110 recommended fuse blocks lj600 series refer to fuse block section of this catalog for additional infor- mation. longer equipment life current-limiting design reduces damage to equipment caused by heating and magnetic effects of short-circuit currents. economical extremely current-limiting design often permits use of readily available, less costly equipment. manufacturers of equipment containing dual voltage devices can simplify manufacturing and reduce inventory by standardizing on 600 volt jls fuses and class j fuse blocks for all ac voltage ratings. easy to use 200,000 a.i.r. rating minimizes need for short-circuit calculations. note: littelfuse jls fuses are not time-delay fuses. for applications where short-duration surges and spikes may cause nuisance fuse opening, consider the use of littelfuse powr-pro jtd series time-delay fuses. jls series fuses provide space-saving, fast-acting overload and short-circuit protection for non-inductive loads. when used for motors or other inductive loads, the ampere rating of jls series fuses must be increased to prevent nuisance opening on inrush currents. in such applications, jls fuses may provide only short circuit protection. consider using littelfuse powr-pro jtd series time-delay fuses in such circuits. applications general purpose circuits with little or no motor load. resistive loads, such as resistance electric heat. loads requiring fast-acting overload protection, such as equipment containing solid-state devices. space saving jls fuse characteristics are similar to klnr/klsr fast- acting class rk1 fuses, but they are much smaller. safety 200,000 a.i.r. reliable interruption of all overcurrents up to 200,000 amperes. extremely current limiting stops damaging short-circuit current faster than any mechanical protective device. fast-acting provides fast-acting protection to equipment such as variable speed drives, rectifiers and other equip- ment containing surge-sensitive components.
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 .08 .06 .04 .03 .02 .01 200 300 400 600 800 1000 2000 3000 4000 6000 8000 10000 20000 30000 40000 60000 80000 100000 8 10 20 30 40 60 80 100 5 30a 60a 100a 200a 400a 600a time in seconds current in amperes 38 general purpose fuses jls class j fuses 600 vac fast-acting 1 600 amperes abcdefgh 1 30 1 2-1/4 1/2 13/16 (57.2) (12.7) (20.6) 35 60 1 2-3/8 5/8 1-1/16 (60.3) (15.9) (27.0) 70 100 2 2-5/8 3-17/32 3-23/32 4-5/8 1 3/4 9/32 1/8 (66.7) (89.7) (94.5) (117.5) (25.4) (19.1) (7.1) (3.2) 110 200 2 3 4-9/32 4-15/32 5-3/4 1-1/2 1-1/8 9/32 3/16 (76.2) (108.7) (113.5) (146.1) (38.1) (28.6) (7.1) (4.8) 225 400 2 3-3/8 5-1/8 5-3/8 7-1/8 2 1-5/8 13/32 1/4 (85.7) (130.2) (136.5) (181.0) (50.8) (41.3) (10.3) (6.4) 450 600 2 3-3/4 5-27/32 6-5/32 8 2-1/2 2 17/32 3/8 (95.3) (148.4) (156.4) (203.2) (63.5) (50.8) (13.5) (9.5) amperes refer to fig. no. dimensions in inches (mm in parentheses) a c d g f e h a b c d fig. 1 fig. 2 2000 3000 4000 6000 8000 10000 20000 30000 40000 60000 80000 100000 200000 100 200 300 400 600 800 1000 100 200 300 400 600 800 1000 2000 3000 4000 6000 8000 10000 20000 30000 40000 60000 80000 100000 200000 300000 400000 600000 800000 1000000 600a 400a 200a 100a 60a 30a peak let-thru in amperes available fault current symmetrical r. m. s. amperes
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