POWR-GARD® Fuse Datasheet Class RK1 – KLNR • KLSR Series FUSES 250/600 VAC • Fast-Acting • 1-600 A Ordering Information 1 2 3 4 5 6 8 10 12 15 20 25 30 35 ampere ratings 40 45 50 60 70 80 90 100 110 125 150 175 200 225 250 300 350 400 450 500 600 600 V series amperage KLSR 90 Catalog Number Ordering Number KLSR090 KLSR090.V 250 V series amperage KLNR 90 Catalog Number Ordering Number KLNR090 KLNR090.V Web Resources Description TC Curves, downloadable CAD drawings and other technical information: w ww.littelfuse.com/klsr www.littelfuse.com/klnr KLSR/KLNR fuses are an economical single element design providing the safety of an RK1 fuse. Applications • Resistance heaters Peak Let-Thru Curve (600 V) • Lighting circuits KLSR • Non-inductive loads Features/Benefits • Extremely Current-Limiting • Indicating and din mount fuse holders available Specifications Voltage Ratings Interrupting Ratings Ampere Range Approvals AC: 250 V (KLNR); 600 V (KLSR) DC: 125 V (1 – 600 A KLNR); 250 V (1 – 30 A KLSR); 300 V (35 – 600 A KLSR). AC: 200 kA rms symmetrical DC: 20 kA 1 – 600 A AC: S tandard 248-12, Class RK1 UL Listed (File: E81895) CSA Certified (File: LR29862) DC: Littelfuse self-certified Recommended Fuse Holders LFR60 Series • LFR25 Series Dimensions Please refer to the Class R dimensions www.littelfuse.com 1 of 2 © 2012 Littelfuse POWR-GARD® Products 05549002 Rev: 083012 POWR-GARD® Fuse Datasheet Class RK1 – KLNR • KLSR Series FUSES Dimensions F G A B D E FIGURE NUMBER / –30 1 1 10 35 – 60 1 70 – 100 2 110 – 200 2 225 – 400 2 450 – 600 2 www.littelfuse.com E C F B H C FIG. 1 AMPS A K D J 70-600A FIG. 2 DIMENSIONS INCHES (mm) SERIES A B C ⁄2 (12.7) 1 5 (127.0) 3 KLNR 3 (76.2) 3 KLNR 2 (50.8) 1 KLSR D ⁄2 (12.7) 9 ⁄4 (19.1) 5 ⁄4 (19.1) 5 E G H J K ⁄8 (9.5) — — — ⁄8 (15.9) — — — ⁄8 (15.9) — — — ⁄16 (14.3) 5 ⁄64 (2.0) 5 ⁄32 (4.0) ⁄8 (15.9) 13 ⁄16 (20.6) 3 ⁄32 (2.4) 3 ⁄16 (4.8) 5 ⁄8 (15.9) 13 ⁄16 (20.6) 3 ⁄32 (2.4) 3 ⁄16 (4.8) 5 ⁄8 (15.9) 1 ⁄ 16 (27.0) 3 ⁄32 (2.4) 1 ⁄4 (6.4) 7 ⁄ (3.2) 3 ⁄8 (3.2) 3 KLSR 5 ⁄ 2 (139.7) 1 (25.4) 5 KLNR 5 ⁄ (149.2) 1 (25.4) 1⁄ (27.0) 1 KLSR 7 ⁄ 8 (200.0) 11 ⁄ 4 (31.8) 11 ⁄ 16 (27.0) 15 ⁄ 16 (33.3) 1 KLNR 71 ⁄ 8 (181.0) 115 ⁄ 32 (37.3) 119 ⁄ 32 (40.5) 3 KLSR 9 5 ⁄ 8 (244.5) 13 ⁄ 4 (44.5) 115 ⁄ 32 (37.3) 127⁄ 32 (46.8) 3 KLNR 8 5 ⁄ 8 (219.1) 115 ⁄ 16 (49.2) 2 3 ⁄ 32 (53.2) KLSR 115 ⁄ 8 (295.3) 2 1⁄ 2 (63.5) KLNR KLSR 1 F 1 ⁄8 (22.2) — ⁄ (19.1) — 1 ⁄4 (19.1) — 1 ⁄16 (4.8) 11⁄ 8 (28.6) — ⁄16 (4.8) 11⁄ 8 (28.6) 1 ⁄4 (6.4) 219 ⁄ 32 (65.9) 1 10 3 ⁄ 8 (263.5) 2 1⁄ 2 (63.5) 2 3 ⁄ 8 (60.3) 219 ⁄ 32 (65.9) 13 3 ⁄ 8 (339.7) 213 ⁄ 32 (61.1) 3 3 ⁄ 32 (78.6) 7 8 7 11⁄ 2 (38.1) 2 (50.8) 3 (76.2) 1 16 (27.0) 2 (50.8) 1⁄ 3 1 16 2 of 2 — — ⁄ (6.4) 9 ⁄ (7.1) 1 ⁄4 (6.4) 9 ⁄32 (7.1) 1 7 ⁄16 (11.1) 9 ⁄32 (7.1) 11 ⁄16 (17.5) — 7 ⁄16 (11.1) 9 ⁄32 (7.1) 11 ⁄16 (17.5) 15 ⁄ 8 (41.3) — 5 ⁄8 (15.9) 13 ⁄32 (10.3) 15 ⁄16 (23.8) ⁄4 (6.4) 15 ⁄ 8 (41.3) — 5 ⁄8 (15.9) 13 ⁄32 (10.3) 15 ⁄16 (23.8) 1 ⁄4 (6.4) 2 (50.8) — 3 ⁄4 (19.1) 17 ⁄32 (13.5) 11⁄ 8 (28.6) 1 ⁄4 (6.4) 2 (50.8) — 3 ⁄4 (19.1) 17 ⁄32 (13.5) 11⁄ 8 (28.6) 8 4 4 32 ⁄ (12.7) 2 ⁄2 (12.7) © 2012 Littelfuse POWR-GARD® Products Rev: 083012