POWR-GARD® Fuse Datasheet Class L – KLLU Series Fuses 600 VAC • Time-Delay • 601-4000 A Ordering Information 601 650 700 750 800 900 Series amperage KLLU 601 ampere ratings 1000 1400 1200 1500 1350 1600 1800 2000 2500 3000 3500 4000 Catalog Number Ordering Number KLLU601 KLLU601.X Web Resources TC Curves, downloadable CAD drawings and other technical information: www.littelfuse.com/kllu Dimensions Description Please refer to the Class L dimensions page 2 KLLU series fuses meet or exceed UL requirements for UL Class L fuses. The KLLU series offers an economical alternative to KLPC POWR-PRO® fuse with a slightly higher peak let through current. Peak Let-Thru Curve KLLU Applications • Service switches • Switchboard mains and feeders • Motor control center mains • Large motor branch circuits • Circuit breaker protection Features/Benefits • Current-Limiting • Easily coordinated with other system components • 200 kA AC Interrupting Rating Specifications Voltage Ratings Interrupting Ratings Ampere Range Approvals AC: 600 V DC: 300 V AC: 200 kA DC: 20 kA 601–4000 A Standard 248-10, Class L UL Listed (File: E81895) CSA Certified (File: LR29862) DC: Littelfuse self-certified Note: For more information, see Peak Let-Thru Table www.littelfuse.com 1 of 2 © 2012 Littelfuse POWR-GARD® Products Rev: 100112 POWR-GARD® Fuse Datasheet Class L – KLLU Series Fuses Current-Limiting Effects of KLLU (600 V) Fuses Short-Circuit Current* 5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 50,000 60,000 80,000 100,000 150,000 200,000 Apparent RMS Symmetrical Current for Various Fuse Ratings 1200 A 1600 A 2000 A 3000 A 5,000 5,000 5,000 5,000 10,000 10,000 10,000 10,000 15,000 15,000 15,000 15,000 18,500 20,000 20,000 20,000 20,000 25,000 25,000 25,000 21,000 26,500 30,000 30,000 22,000 28,500 34,000 35,000 23,000 30,000 35,000 37,000 24,000 32,000 38,000 39,000 26,000 34,000 42,000 43,000 28,000 36,000 44,000 46,000 30,000 38,000 46,000 48,000 35,000 44,000 50,000 51,000 38,000 48,000 53,000 60,000 800 A 5,000 10,000 11,900 13,000 14,000 14,500 15,000 16,000 17,000 18,000 19,000 21,000 24,000 26,000 4000 A 5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 44,000 50,000 54,500 57,500 68,000 74,000 *Prospective RMS Symmetric al Amperes Short-Circuit Current • Note: Data derived from Peak Let-Thru Curves Dimensions Amperes Fig. No. 200-800 1 900-1200 2 1300-1600 2 1800-2000 2 2100-2500 3 2501-3000 3 3500-4000 4 4500-5000 5 6000 5 Dimensions Inches (mm) A 3 3 ⁄4 (95.3) 33 ⁄4 (95.3) 33 ⁄4 (95.3) 33 ⁄4 (95.3) 4 (101.6) 4 (101.6) 4 (101.6) 4 (101.6) 4 (101.6) B 53 ⁄4 (146.1) 53 ⁄4 (146.1) 53 ⁄4 (146.1) 53 ⁄4 (146.1) 53 ⁄4 (146.1) 53 ⁄4 (146.1) 53 ⁄4 (146.1) 53 ⁄4 (146.1) 53 ⁄4 (146.1) C 63 ⁄4 (171.5) 63 ⁄4 (171.5) 63 ⁄4 (171.5) 63 ⁄4 (171.5) 63 ⁄4 (171.5) 63 ⁄4 (171.5) 63 ⁄4 (171.5) — — D E — — 9 ⁄4 (235.0) 91⁄ 4 (235.0) 91⁄ 4 (235.0) 91⁄ 4 (235.0) 91⁄ 4 (235.0) 91⁄ 4 (235.0) 91⁄ 4 (235.0) 91⁄ 4 (235.0) 9 ⁄2 (241.3) 91⁄ 2 (241.3) 91⁄ 2 (241.3) 91⁄ 2 (241.3) 91⁄ 2 (241.3) 91⁄ 2 (241.3) 1 1 — — F 8 5⁄ 8 (219.1) 10 3 ⁄ 4 (273.1) 10 3 ⁄ 4 (273.1) 10 3 ⁄ 4 (273.1) 10 3 ⁄ 4 (273.1) 10 3 ⁄ 4 (273.1) 10 3 ⁄ 4 (273.1) 10 3 ⁄ 4 (273.1) 10 3 ⁄ 4 (273.1) G — — — — — — 15⁄ 8 (41.3) 15⁄ 8 (41.3) 13 ⁄ 4 (44.5) 15⁄ 8 (41.3) 15⁄ 8 (41.3) 13 ⁄ 4 (44.5) 13 ⁄ 4 (44.5) 31⁄ 4 (82.6) 31⁄ 4 (82.6) 31⁄ 4 (82.6) F J H J H D E F M ⁄8 (9.5) ⁄8 3 (9.5) 7 ⁄16 (11.1) ⁄2 1 (12.7) 3 ⁄4 (19.1) 3 ⁄4 (19.1) 3 ⁄4 (19.1) 1 (25.4) 1 (25.4) C B A N M FIG.2 L 3 N ⁄8 x 11⁄8 (15.9) x (28.6) 5 ⁄8 x 3 ⁄4 (15.9) x (19.1) 5 ⁄8 x 3 ⁄4 (15.9) x (19.1) 5 ⁄8 x 3 ⁄4 (15.9) x (19.1) 5 ⁄8 x 3 ⁄4 (15.9) x (19.1) 5 ⁄8 x 3 ⁄4 (15.9) x (19.1) 5 ⁄8 x 13 ⁄8 (15.9) x (34.9) 5 ⁄8 DIA. (15.9) 5 ⁄8 DIA. (15.9) — ⁄8 x 11⁄8 (15.9) x (28.6) 5 ⁄ 8 x 11⁄8 (15.9) x (28.6) 5 ⁄8 x 11⁄8 (15.9) x (28.6) 5 ⁄8 x 11⁄8 (15.9) x (28.6) 5 ⁄8 x 11⁄8 (15.9) x (28.6) 5 ⁄8 x 13 ⁄8 (15.9) x (34.9) 5 — — D E F G FIG. 3 A F D B K G 5 H D E F C B A FIG.1 FIG. 4 www.littelfuse.com K 21⁄ 2 (63.5) 21⁄ 2 (63.5) 3 (76.2) 31⁄ 2 (88.9) 5 (127.0) 5 (127.0) 53 ⁄4 (146.1) 71⁄ 8 (181.0) 71⁄ 8 (181.0) J N M C B A J 2 (50.8) 2 (50.8) 23 ⁄8 (60.3) 23 ⁄4 (69.9) 31⁄ 2 (88.9) 4 (101.6) 43 ⁄ 4 (120.7) 51⁄ 4 (133.4) 51⁄ 4 (133.4) J M N M — — J C B A H G L M FIG. 5 2 of 2 © 2012 Littelfuse POWR-GARD® Products Rev: 100112