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) GENERAL PURPOSE FUSES AMPERE RATINGS 1 3 6 10 15 20 25 30 35 40 45 50 60 70 80 90 100 110 125 150 175 200 225 250 300 350 400 450 500 600 Example part number (series & amperage): JLS 110 RECOMMENDED FUSE BLOCKS LJ600 series Refer to Fuse Block section of this catalog for additional information. 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 LONGER EQUIPMENT LIFE ■ 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. 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 fastacting 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 equipment containing surge-sensitive components. Current-limiting design reduces damage to equipment caused by heating and magnetic effects of short-circuit currents. 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. 37 JLS CLASS J FUSES 600 VAC ■ Fast-Acting 1 — 600 Amperes ■ C G F D GENERAL PURPOSE FUSES E Fig. 2 Fig. 1 DIMENSIONS IN INCHES (mm in parentheses) REFER TO FIG. NO. AMPERES H A B C D A A B C D E F G H — 1/2 (12.7) 13/16 (20.6) — — — — — 5/8 (15.9) 1-1/16 (27.0) — — — — 70 – 100 2 2-5/8 (66.7) 3-17/32 (89.7) 3-23/32 (94.5) 4-5/8 (117.5) 1 (25.4) 3/4 (19.1) 9/32 (7.1) 1/8 (3.2) 110 – 200 2 3 (76.2) 4-9/32 (108.7) 4-15/32 (113.5) 5-3/4 (146.1) 1-1/2 (38.1) 1-1/8 (28.6) 9/32 (7.1) 3/16 (4.8) 225 – 400 2 3-3/8 (85.7) 5-1/8 (130.2) 5-3/8 (136.5) 7-1/8 (181.0) 2 (50.8) 1-5/8 (41.3) 13/32 (10.3) 1/4 (6.4) 450 – 600 2 3-3/4 (95.3) 5-27/32 (148.4) 6-5/32 (156.4) 8 (203.2) 2-1/2 (63.5) 2 (50.8) 17/32 (13.5) 3/8 (9.5) 60A 600A 2-3/8 (60.3) 400A 1 200A 35 – 60 100A 1 30A 1 – 30 2-1/4 (57.2) 1000 800 600 1000000 800000 600000 400 300 400000 300000 200 200000 100 80 60 100000 80000 60000 PEAK LET-THRU IN AMPERES 40 30 10 8 6 4 3 2 1 .8 .6 .4 .3 200A 100A 60A 10000 8000 6000 30A 4000 3000 2000 200 .04 .03 60000 80000 100000 30000 40000 20000 6000 8000 10000 3000 4000 2000 600 800 1000 300 400 200 60 80 100 30 40 20 8 10 CURRENT IN AMPERES AVAILABLE FAULT CURRENT SYMMETRICAL R. M. S. AMPERES 200000 60000 80000 100000 30000 40000 20000 6000 8000 10000 3000 4000 2000 600 800 1000 300 400 100 100 .02 5 20000 400 300 .1 .08 .06 38 400A 1000 800 600 .2 .01 600A 40000 30000 200 TIME IN SECONDS 20