POWR-GARD(R) Fuse Datasheet Class RK1 - LLNRK * LLSRK * LLSRK_ID Series FUSES 250/600 VAC * Dual Element * Time-Delay * 1/10 -600 A QPL Ordering Information / 15/100 2/10 1/4 3/10 4/10 1/2 6/10 8/10 1 1 1/8 1 1/4 1 4/10 1 6/10 1 8/10 2 2 1/4 2 1/2 1 10 Ampere ratings 2 8/10 6 1/4 25 3 7 30 3 2/10 8 35 3 1/2 9 40 4 10 45 4 1/2 12 50 5 15 60 5 6/10 17 1/2 70 6 20 75* 80 90 100 110 125 150 175 200 225 250 300 350 400 450 500 600 Note: All LLSRK_ID fuses rated 1 amp and above are Indicator(R) fuses. *75 A is only available for the 600 V. 600 V type Description RK1 fuses are extremely current-limiting fuses meaning they greatly reduce or eliminate damage to circuits and equipment under short-circuit conditions. Replacing existing Class H, K and RK5 fuses with RK1 fuses is one of the easiest ways to immediately improve the protection of plant workers and equipment. amperage Catalog Number llsrk_ID 60 LLSRK060ID LLSRK 60 LLSRK060 Ordering Number LSRK060.TXID LSRK060.T Catalog Number LLNRK080 Ordering Number LNRK080.V series Indicating Non-indicating 250 V type series amperage Non-indicating LLNRK 80 Applications Web Resources * * * * TC Curves, downloadable CAD drawings and other technical information: L ittelfuse.com/llsrk Littelfuse.com/llnrk All general purpose circuits Motors Transformers Safety upgrades Dimensions Features/Benefits Please refer to the Class R dimensions page 3. * * * * * Peak Let-Thru Curve (600 V) POWR-PRO Performance Indication available Dual-element design Extremely Current-Limiting IEC Type 2 "No Damage" protection to IEC and NEMA type motor starters * Indicating and din mount fuse holders available Voltage Ratings Interrupting Ratings Ampere Range Approvals 1000000 100000 PEAK LET-THRU IN AMPERES Specifications LLSRK 600 VAC/300 VDC (LLSRK/LLSRK_ID) 250 VAC/125 VDC (LLNRK) AC: 2 00 kA rms symmetrical 300 kA rms symmetrical (Littelfuse self-certified) DC: 20 kA 1/10 - 600 A AC: S tandard 248-12, Class RK1 UL Listed (File: E81895) CSA Certified (File: LR29862) DC: Littelfuse self-certified Federal Specification WF-1814 (QPL- W-F-1814) 200 A 100 A 60 A 10000 30 A 1000 200000 100000 10000 1000 100 100 Recommended Fuse Holders AVAILABLE FAULT CURRENT SYMMETRICAL R.M.S. AMPERES LFR60 Series * LFR25 Series Littelfuse.com 500 A 400 A Note: For more information, see Peak Let-Thru Table 1 of 3 (c) 2013 Littelfuse POWR-GARD(R) Products Rev: 040913 POWR-GARD(R) Fuse Datasheet Class RK1 - LLNRK * LLSRK * LLSRK_ID Series FUSES Current-Limiting Effects of LLSRK and LLSRK_ID (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 30 A 1,060 1,350 1,600 1,700 1,900 2,000 2,100 2,200 2,400 2,500 2,700 2,900 3,200 3,300 60 A 1,600 2,000 2,300 2,600 2,800 3,000 3,100 3,300 3,500 3,800 4,000 4,200 4,600 4,700 100 A 2,100 2,800 3,200 3,600 3,800 4,100 4,400 4,600 4,900 5,200 5,700 6,200 7,300 8,000 200 A 2,600 3,400 3,900 4,500 4,800 5,200 5,700 6,000 6,500 7,000 7,750 8,500 10,000 11,000 400 A 4,100 5,250 6,000 6,700 7,500 8,000 8,500 9,000 9,500 10,000 11,000 12,000 14,000 16,000 600 A -8,000 9,000 10,000 11,000 12,000 12,500 13,000 14,000 15,000 17,000 18,000 21,000 23,000 Visit www.littelfuse.com/llsrk for 600 V Current-Limiting effects Current-Limiting Effects of LLNRK (250 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 30 A 900 1,100 1,250 1,400 1,500 1,600 1,700 1,800 1,900 2,000 2,200 2,300 2,500 2,600 60 A 1,400 1,900 2,100 2,400 2,600 2,800 2,850 3,000 3,200 3,500 3,900 4,000 4,500 4,800 100 A 2,000 2,700 3,100 3,500 3,900 4,000 4,300 4,600 4,800 5,200 5,700 6,000 6,700 7,000 200 A 2,700 3,500 4,200 4,600 5,000 5,250 5,500 5,800 6,300 6,700 7,200 8,100 9,100 9,700 400 A 4,800 6,200 7,000 8,000 8,300 9,000 9,500 9,800 10,200 11,000 12,200 12,700 14,000 15,000 600 A 5,000 8,500 9,500 10,800 11,500 12,000 12,500 13,500 14,000 15,000 16,000 17,000 19,000 20,000 Visit www.littelfuse.com/llnrk for 250 V Current-Limiting effects *Prospective RMS Symmetrical Amperes Short-Circuit Current Note: Data derived from Peak Let-Thru Curves LLSRK_ID Fuses--Quality Construction for performance you can rely on... Littelfuse LLSRK_ID Fuses feature true dual-element construction. This robust design withstands repeated surges within rated time delay without opening needlessly, eliminating downtime caused by power surges or equipment demands. Plated End Caps Blown Fuse Indicator Assembly Precision Formed Short Circuit Element Fiberglass Reinforced Pultruded Body Granular Quartz Filling Littelfuse.com Elastomeric Silicone Overload Section 2 of 3 (c) 2013 Littelfuse POWR-GARD(R) Products Rev: 040913 POWR-GARD(R) Fuse Datasheet Class RK1 - LLNRK * LLSRK * LLSRK_ID Series FUSES Dimensions A F G B D E FIGURE NUMBER / -30 1 10 35 - 60 70 - 100 110 - 200 1 1 2 2 450 - 600 Littelfuse.com 2 2 F D J 70-600A FIG. 2 DIMENSIONS INCHES (mm) SERIES A B C 2 (12.7) 1 3 4 (19.1) 3 D 2 (12.7) 9 5 8 (15.9) 4 (19.1) 5 51 2 (139.7) 1 (25.4) 5 LLNRK 57 8 (149.2) 1 (25.4) LLSRK LSRK_ID 77 8 (200.0) LLNRK 71 8 (181.0) F G H J K 8 (9.5) -- -- -- 8 (15.9) -- -- -- 8 (15.9) -- -- -- 8 (22.2) -- -- -- 5 64 (2.0) 5 32 (4.0) 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) 11 16 (27.0) 3 32 (2.4) 1 4 (6.4) 7 11 16 (27.0) 11 16 (27.0) 1 8 (3.2) 3 4 (19.1) -- 1 4 (6.4) 9 32 (7.1) 1 11 4 (31.8) 11 16 (27.0) 15 16 (33.3) 1 8 (3.2) 3 4 (19.1) -- 1 4 (6.4) 9 32 (7.1) 1 11 2 (38.1) 115 32 (37.3) 119 32 (40.5) 3 16 (4.8) 11 8 (28.6) -- 7 16 (11.1) 9 32 (7.1) 11 16 (17.5) 9 5 8 (244.5) 13 4 (44.5) 115 32 (37.3) 127 32 (46.8) 3 16 (4.8) 11 8 (28.6) -- 7 16 (11.1) 9 32 (7.1) 11 16 (17.5) 8 5 8 (219.1) 115 16 (49.2) 2 3 32 (53.2) 1 4 (6.4) 15 8 (41.3) -- 5 8 (15.9) 13 32 (10.3) 15 16 (23.8) 219 32 (65.9) 1 4 (6.4) 15 8 (41.3) -- 5 8 (15.9) 13 32 (10.3) 15 16 (23.8) 2 (50.8) 1 LLSRK LSRK_ID 5 (127.0) LLNRK 3 (76.2) LLSRK LSRK_ID LLSRK LLSRK_ID E 16 (14.3) LLNRK LLNRK 225 - 400 E C B H C FIG. 1 AMPS A K 2 (50.8) 3 2 (12.7) 2 (12.7) LLSRK LLSRK_ID 115 8 (295.3) 2 1 2 (63.5) LLNRK 10 3 8 (263.5) 2 1 2 (63.5) 2 3 8 (60.3) 219 32 (65.9) 1 4 (6.4) 2 (50.8) -- 3 4 (19.1) 17 32 (13.5) 11 8 (28.6) 13 3 8 (339.7) 213 32 (61.1) 3 3 32 (78.6) 1 4 (6.4) 2 (50.8) -- 3 4 (19.1) 17 32 (13.5) 11 8 (28.6) LLSRK LLSRK_ID 3 (76.2) 2 (50.8) 3 of 3 (c) 2013 Littelfuse POWR-GARD(R) Products Rev: 040913