80 semiconductor fuses 150/250/500/600/700 vac very fast-acting 1 ?1000 amperes designed to protect today s equipment and systems, littelfuse semiconductor fuses are manufactured with littelfuse-developed technology that sets tomorrow s stan- dards for accuracy, consistent quality, reliability, and predict- able performance. by using advanced metallurgical, polymer, and materials research; mathematical modeling, and comput- erized statistical analysis; littelfuse engineers have redefined ?tate-of-the-art. applications designed specifically for supplementary protection of semiconducting devices such as silicon controlled rectifiers (scr s), diodes, thyristors, triacs, transistors, and similar solid-state devices. these devices are used in power equipment including variable speed drives, power rectifiers, ups systems, dc power supplies, and in a wide range of electronic equipment. may be used wherever extremely fast-acting, current-limiting fuses with no time delay are required. specifications voltage ratings: l15s: 150 v ac/dc (1 ?60a) 150 vac (70 ?1000a) 100 vdc (70 ?1000a) l25s: 250 v ac/dc (1 ?200a) 250 vac (225 ?800a) 200 vdc (225 ?800a) l50s: 500 vac/450vdc l60s: 600 vac klc: 600 vac l70s: 700vac/650vdc interrupting rating: ac: 200,000 rms amperes (l15s series 100,000 amperes) dc: 20,000 amperes ampere range: 1 ?1000 amperes see rating table for ratings available in each series. approvals: ul recognized under the components program and csa recognized under the component acceptance program. ul file no: e71611 csa file no: lr29862 l15s and l25s series fuses are littelfuse certified for dc ratings shown in rating table. ampere ratings see rating table. recommended fuse blocks lscr series: refer to fuse block section of this catalog for additional information. safety 200,000 a.i.r. ?reliable interruption of all overcurrents up to 200,000 amperes . . . meets present and future system requirements. (note: l15s series has 100,000 a.i.r.) extremely current limiting ?low i 2 t and peak let-through currents meet most semiconductor requirements. ul recognized ?littelfuse semiconductor fuses are recognized under the components program of underwriters laboratories, inc., and carry the mark. ul recognized semiconductor fuses may be used to provide supplemen- tary protection in ul listed equipment. longer equipment life low watt losses ?means less heating and power consumption in circuit. controlled transient overvoltages ?all circuits are subject to transient overvoltages during fault current interruption. these transient overvoltages (arc voltages) start when fuse links melt or circuit breaker contacts part, and subside when circuit is interrupted. semiconductors are very sensitive to overvoltages. littelfuse semiconductor fuse designs keep transient overvoltages to low levels and help reduce semiconductor failure.
81 ?klc series fuses are recommended for replacement use only. semiconductor fuses 150/250/500/600/700 vac very fast-acting 1 ?1000 amperes series & voltage l15s l25s l50s l60s klc l70s 150v ac 250v ac 150v dc (1 ?60a) 250v dc (1 ?200a) 500v ac 600v ac 600v ac 700v ac 100v dc (70 ?1000a) 200v dc (225 ?800a) 450v dc 650v dc 1 l15s 1 l25s 1 l60s 1 klc 1 2 l15s 2 l25s 2 l60s 2 klc 2 3 l15s 3 l25s 3 l60s 3 klc 3 4 l15s 4 l25s 4 l60s 4 klc 4 5 l15s 5 l25s 5 l60s 5 klc 5 6 l15s 6 l25s 6 l60s 6 klc 6 7 l15s 7 klc 7 8 l15s 8 l25s 8 l60s 8 klc 8 9 l15s 9 10 l15s 10 l25s 10 l50s 10 l60s 10 klc 10 l70s 10 12 l15s 12 l25s 12 l50s 12 l60s 12 klc 12 15 l15s 15 l25s 15 l50s 15 l60s 15 klc 15 l70s 15 17 1 2 l60s 17 1 2 klc 17 1 2 20 l15s 20 l25s 20 l50s 20 l60s 20 klc 20 l70s 20 25 l15s 25 l25s 25 l50s 25 l60s 25 klc 25 l70s 25 30 l15s 30 l25s 30 l50s 30 l60s 30 klc 30 l70s 30 35 l15s 35 l25s 35 l50s 35 l60s 35 klc 35 l70s 35 40 l15s 40 l25s 40 l50s 40 l60s 40 klc 40 l70s 40 45 l15s 45 l25s 45 l60s 45 klc 45 50 l15s 50 l25s 50 l50s 50 l60s 50 klc 50 l70s 50 60 l15s 60 l25s 60 l50s 60 l60s 60 klc 60 l70s 60 70 l15s 70 l25s 70 l50s 70 l60s 70 klc 70 l70s 70 80 l15s 80 l25s 80 l50s 80 l60s 80 klc 80 l70s 80 90 l15s 90 l25s 90 l50s 90 l60s 90 klc 90 l70s 90 100 l15s 100 l25s 100 l50s 100 l60s 100 klc 100 l70s 100 110 klc 110 125 l15s 125 l25s 125 l50s 125 l60s 125 klc 125 l70s 125 150 l15s 150 l25s 150 l50s 150 l60s 150 klc 150 l70s 150 175 l25s 175 l50s 175 l60s 175 klc 175 l70s 175 200 l15s 200 l25s 200 l50s 200 l60s 200 klc 200 l70s 200 225 l25s 225 l50s 225 l60s 225 klc 225 l70s 225 250 l15s 250 l25s 250 l50s 250 l60s 250 klc 250 l70s 250 275 l25s 275 l50s 275 300 l15s 300 l25s 300 l50s 300 l60s 300 klc 300 l70s 300 350 l15s 350 l25s 350 l50s 350 l60s 350 klc 350 l70s 350 400 l15s 400 l25s 400 l50s 400 l60s 400 klc 400 l70s 400 450 l15s 450 l25s 450 l50s 450 l60s 450 klc 450 l70s 450 500 l15s 500 l25s 500 l50s 500 l60s 500 klc 500 l70s 500 550 l50s 550 600 l15s 600 l25s 600 l50s 600 l60s 600 klc 600 l70s 600 700 l25s 700 l50s 700 l60s 700 klc 700 l70s 700 800 l15s 800 l25s 800 l50s 800 l60s 800 klc 800 l70s 800 900 1000 l15s 1000 ampere ratings rating table
82 semiconductor fuses 150/250/500/600/700 vac very fast-acting 1 ?1000 amperes ampere rating dimensions in inches (mm in parentheses) fig. no. abcdefgh 1 ?30 1 1-1/2 3/8 13/32 (38.1) (9.5) (10.3) 31 ?60 1 2 5/8 13/16 (50.8) (15.9) (20.6) 61 ?450 3 1-5/32 1-7/8 2-3/16 2-21/32 1 43/64 5/16 3/16 (29.4) (47.6) (55.6) (67.5) (25.4) (17.1) (7.9) (4.8) 451 ?1000 3 1-1/4 1-15/16 2-9/16 3-1/2 1-1/2 1 13/32 1/4 (31.8) (49.2) (65.1) (88.9) (38.1) (25.4) (10.3) (6.4) l15s series, 150* volts ac (replaces kla, klw, l13s) ampere rating dimensions in inches (mm in parentheses) fig. no. abcdefgh 1 ?30 1 2 1/29/16 (50.8) (12.7) (14.3) 31 ?60 2 1-5/8 2-1/4 2-1/2 3-3/16 13/16 23/32 11/32 1/8 (41.3) (57.2) (63.5) (81.0) (20.6) (18.3) (8.7) (3.2) 61 ?200 3 1-5/8 2-5/16 2-7/16 3-1/8 1-7/32 1 5/16 3/16 (41.3) (58.7) (61.9) (79.4) (31.0) (25.4) (7.9) (4.8) 201 ?700 3 1-19/32 2-9/32 2-29/32 3-27/32 1-1/2 1 13/32 1/4 (40.5) (57.9) (73.8) (97.6) (38.1) (25.4) (10.3) (6.4) 701 ?800 3 1-19/32 2-9/32 2-29/32 3-27/32 2 1-1/2 13/32 1/4 (40.5) (57.9) (73.8) (97.6) (50.8) (38.1) (10.3) (6.4) l25s series, 250 volts ac (replaces klb) ampere rating dimensions in inches (mm in parentheses) fig. no. abcdefgh 10 ?30 1 2 1/29/16 (50.8) (12.7) (14.3) 31 ?60 2 1-5/8 2-1/4 2-1/2 3-3/16 13/16 23/32 11/32 1/8 (41.3) (57.2) (63.5) (81.0) (20.6) (18.3) (8.7) (3.2) 61 ?100 3 2-1/8 2-11/16 3-1/32 3-5/8 1 3/4 11/32 1/8 (54.0) (68.3) (77.0) (92.1) (25.4) (19.1) (8.7) (3.2) 101 ?200 3 2-1/8 2-13/16 2-15/16 3-5/8 1-7/32 1 5/16 3/16 (54.0) (71.4) (74.6) (92.1) (31.0) (25.4) (7.9) (4.8) 201 ?400 3 2-3/32 2-25/32 3-13/32 4-11/32 1-1/2 1 13/32 1/4 (53.2) (70.6) (86.5) (110.3) (38.1) (25.4) (10.3) (6.4) 401 ?600 3 2-7/32 2-29/32 3-17/32 4-15/32 2 1-1/2 13/32 1/4 (56.4) (73.8) (89.7) (113.5) (50.8) (38.1) (10.3) (6.4) 601 ?800 3 2-7/32 4-9/32 4-5/8 6-15/32 2-1/2 2 17/32 3/8 (56.4) (108.7) (117.5) (164.3) (63.5) (50.8) (13.5) (9.5) l50s series, 500 volts ac / 450 volts dc (replaces klh) e h f g a b c d fig, 2 a c d fig. 1
83 f g a b c e j h fig. 4 semiconductor fuses 150/250/500/600/700 vac very fast-acting 1 1000 amperes abcdefghj 10 30 1 2 1/2 9/16 (50.8) (12.7) (14.3) 31 60 3 2-7/8 3-7/16 3-25/32 4-3/8 1 43/64 11/32 1/8 (73.0) (87.3) (96.0) (111.1) (25.4) (17.1) (8.7) (3.2) 61 100 3 2-7/8 3-9/16 3-11/16 4-3/8 1-7/32 29/32 5/16 3/16 (73.0) (90.5) (93.7) (111.1) (31.0) (22.9) (7.9) (4.8) 101 200 3 2-27/32 3-17/32 4-5/32 5-3/32 1-1/2 1 13/32 1/4 (72.2) (89.7) (105.6) (129.4) (38.1) (25.4) (10.3) (6.4) 201 400 3 2-27/32 3-17/32 4-5/32 5-3/32 2 1-1/2 13/32 1/4 (72.2) (89.7) (105.6) (129.4) (50.8) (38.1) (10.3) (6.4) 401 600 3 2-27/32 4-29/32 5-1/4 7-3/32 2-1/2 2 17/32 3/8 (72.2) (124.6) (133.4) (180.2) (63.5) (50.8) (13.5) (9.5) 601 800 4 3-5/16 5-5/16 6-13/16 2-7/8 2 5/8 3/8 5/16 (84.1) (134.9) (173.0) (73.0) (50.8) (15.9) (9.5) (7.9) ampere rating dimensions in inches (mm in parentheses) fig. no. l70s series, 700 volts ac / 650 volts dc abcdefgh 1 30 2 1-7/8 2-1/2 2-7/8 9/16 13/32 1/4 3/64 (47.6) (63.5) (73.0) (14.3) (10.3) (6.4) (1.2) 31 60 2 2-3/4 3-3/8 3-5/8 4-5/16 13/16 23/32 11/32 1/8 (69.9) (85.7) (92.1) (109.5) (20.6) (18.3) (8.7) (3.2) 61 100 3 2-7/8 3-21/32 4-1/16 5 1 3/4 13/32 1/8 (73.0) (92.9) (103.2) (127.0) (25.4) (19.1) (10.3) (3.2) 101 200 3 2-27/32 3-17/32 4-3/8 5-3/32 1-1/2 1 13/32 1/4 (72.2) (89.7) (111.1) (129.4) (38.1) (25.4) (10.3) (6.4) 201 400 3 2-27/32 4-21/32 4-27/32 6-1/4 2 1-5/8 9/16 1/4 (72.2) (118.3) (123.0) (158.8) (50.8) (41.3) (14.3) (6.4) 401 800 3 2-27/32 4-21/32 5-11/32 6-1/4 2-1/2 2 9/16 3/8 (72.2) (118.3) (135.7) (158.8) (63.5) (50.8) (14.3) (9.5) ampere rating dimensions in inches (mm in parentheses) fig. no. klc series, 600 volts ac abcdefgh 1 30 1 5 5/8 13/16 (127.0) (15.9) (20.6) 31 60 2 2-25/32 3-7/16 3-11/16 4-3/8 13/16 23/32 11/32 1/8 (70.6) (87.3) (93.7) (111.1) (20.6) (18.3) (8.7) (3.2) 61 100 2 2-29/32 3-17/32 3-25/32 4-15/32 1-1/16 23/32 11/32 1/8 (73.8) (89.7) (96.0) (113.5) (27.0) (18.3) (8.7) (3.2) 101 200 2 2-29/32 3-9/16 3-3/4 4-13/32 1-5/16 1 5/16 3/16 (73.8) (90.5) (95.3) (111.9) (33.3) (25.4) (7.9) (4.8) 201 400 2 2-29/32 3-31/32 4-5/32 5-1/8 1-37/64 1 13/32 1/4 (73.8) (100.8) (105.6) (130.2) (40.1) (25.4) (10.3) (6.4) 401 600 2 2-7/8 3-31/32 4-9/64 5-1/8 2-1/16 1-1/2 13/32 1/4 (73.0) (100.8) (105.2) (130.2) (52.8) (38.1) (10.3) (6.4) 601 800 2 3-1/32 5-5/32 5-11/32 7-1/4 2-1/2 2 17/32 3/8 (77.0) (133.4) (135.7) (184.2) (63.5) (50.8) (13.5) (9.5) ampere rating dimensions in inches (mm in parentheses) fig. no. l60s series, 600 volts ac a b c d f g e h fig. 3
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