LSRK015-T LITTELFUSE | Alldatasheet

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Technical content

POWR-GARD® Fuse Datasheet © 2016 Littelfuse POWR-GARD® Products Rev: 1-A-031716 littelfuse.com 1 of 3 CLASS RK1 – LLNRK • LLSRK • LLSRK_ID SERIES FUSES 250/600 Vac • Dual Element • Time-Delay • 1/10-600 A

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.

Applications

  • All general purpose circuits
  • Motors
  • Transformers
  • Safety upgrades Features/Benefits
  • 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 Specifications Voltage Ratings 600 Vac/300 Vdc (LLSRK/LLSRK_ID)

250 Vac/125 Vdc (LLNRK)

Interrupting Ratings AC: 200 kA rms symmetrical 300 kA rms symmetrical (Littelfuse self-certified) DC: 20 kA Ampere Range 1/10 – 600 A Approvals AC: Standard 248-12, Class RK1 UL Listed (File: E81895) CSA Certified (File: LR29862) DC: Littelfuse self-certified Federal Specification WF-1814 (QPL- W-F-1814) AMPERE RATINGS 1/10 1 2 8/10 6 1/4 25 80 250 15/100 1 1/8 3 7 30 90 300 2/10 1 1/4 3 2/10 8 35 100 350 1/4 1 4/10 3 1/2 9 40 110 400 3/10 1 6/10 4 10 45 125 450 4/10 1 8/10 4 1/2 12 50 150 500 1/2 2 5 15 60 175 600 6/10 2 1/4 5 6/10 17 1/2 70 200 8/10 2 1/2 6 20 75* 225 Note: All LLSRK_ID fuses rated 1 amp and above are Indicator® fuses. *75 A is only available for the 600 V. Web Resources Download TC Curves, CAD drawings and other technical information: littelfuse.com/llsrk littelfuse.com/llnrk Recommended Fuse Holders LFR60 Series • LFR25 Series 1,000 10,000 100,000PEAK LET- THRU IN AMPERES 600A - 400A - 200A - 100A - 60A - 30A - 12A - 5A - 3.5A - 100 10 100 1,000 10,000 100,000 AVAILABLE FAULT CURRENT SYMMETRICAL R.M.S. AMPERES BASIS FOR DATA: TEST VOLTAGE: 600V TIME CONSTANT/POWER FACTOR: FUSE CATALOG NUMBER: DRAWN BY: DATE: REVISION: DRAWING NO.: SHEET PEAK LET‐THRU CHARACTERISTIC CURVES LITTELFUSE, INC. CHICAGO, IL. USA LLL 03/14/2016 A

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LLSRK & LLSRKID 3.5A - 600A - DATA GENERATED IN EXCEL - Peak Let-Thru Curve (600 V) Note: For more information, see Peak Let-Thru Table Dimensions Please refer to the Class R dimensions page 3.

Ordering Information

INDICATING LLSRK_ID 60 LLSRK060ID LSRK060.TXID NON-INDICATING LLSRK 60 LLSRK060 LSRK060.T 600 V 250 V TYPE SERIES AMP CATALOG NUMBER ORDERING NUMBER NON-INDICATING LLNRK 80 LLNRK080 LNRK080.V LLSRK & LLSRKID QPL

POWR-GARD® Fuse Datasheet © 2016 Littelfuse POWR-GARD® Products Rev: 1-A-031716 littelfuse.com 2 of 3 CLASS RK1 – LLNRK • LLSRK • LLSRK_ID SERIES FUSES SHORT CIRCUIT CURRENT* APPARENT RMS SYMMETRICAL CURRENT FOR VARIOUS FUSE RATINGS

3.5 A 5 A 12 A 30 A 100 A 200 A 400 A 600 A

5,000 196 251 427 586 1,764 2,821 - - 10,000 247 316 538 739 2,222 3,554 6,850 8,489 15,000 283 362 616 845 2,544 4,069 7,8 42 9,718 20,000 312 399 677 930 2,800 4,478 8,631 10,696 25,000 336 430 730 1,002 3,016 4,824 9,297 11,522 30,000 357 456 776 1,065 3,205 5,126 9,880 12,244 35,000 376 481 816 1,121 3,374 5,397 10,401 12,889 40,000 393 502 854 1,172 3,528 5,642 10,874 13,476 50,000 423 541 919 1,263 3,800 6,078 11,714 14,516 60,000 450 575 977 1,342 4,038 6,459 12,448 15,426 80,000 495 633 1,075 1,477 4,445 7,10 9 13,700 16,979 100,000 533 682 1,158 1,591 4,788 7,65 8 14,758 18,290 150,000 610 781 1,326 1,821 5,481 8,766 16,894 20,936 200,000 671 859 1,460 2,005 6,032 9,648 18,594 23,043 Current-Limiting Effects of LLSRK and LLSRK_ID (600 V) Fuses SHORT CIRCUIT CURRENT* APPARENT RMS SYMMETRICAL CURRENT FOR VARIOUS FUSE RATINGS

30 A 60 A 100 A 200 A 400 A 600 A

5,000 900 1,400 2,000 2,700 4,800 5,000 10,000 1,100 1,900 2,700 3,500 6,200 8,500 15,000 1,250 2,100 3,100 4,200 7 ,000 9,500 20,000 1,400 2,400 3,500 4,600 8,000 10,800 25,000 1,500 2,600 3,900 5,000 8,300 11,500 30,000 1,600 2,800 4,000 5,250 9,000 12,000 35,000 1,700 2,850 4,300 5,500 9,500 12,500 40,000 1,800 3,000 4,600 5,800 9,800 13,500 50,000 1,900 3,200 4,800 6,300 10,200 14,000 60,000 2,000 3,500 5,200 6,700 11,000 15,000 80,000 2,200 3,900 5,700 7,20 0 12,200 16,000 100,000 2,300 4,000 6,000 8,100 12,700 17 ,000 150,000 2,500 4,500 6,700 9,100 14,000 19,000 200,000 2,600 4,800 7 ,000 9,700 15,000 20,000 *Prospective RMS Symmetrical Amperes Short-Circuit Current Note: Data derived from Peak Let-Thru Curves Current-Limiting Effects of LLNRK (250 V) Fuses Blown Fuse Indicator Assembly Granular Quartz Filling Precision Formed Short Circuit Element Fiberglass Reinforced Pultruded Body Elastomeric Silicone Overload Section Plated End Caps 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.

POWR-GARD® Fuse Datasheet © 2016 Littelfuse POWR-GARD® Products Rev: 1-A-031716 littelfuse.com 3 of 3 CLASS RK1 – LLNRK • LLSRK • LLSRK_ID SERIES FUSES AMPS FIGURE NUMBER SERIES DIMENSIONS INCHES (mm) A B C D E F G H J K 1/10–30 1 LLSRK 35 – 60 1 LLSRK 70 – 100 2 LLSRK 110 – 200 2 LLSRK 225 – 400 2 LLSRK 450 – 600 2 LLSRK A F E C DG B A J K H B C F D 70-600A FIG. 1 FIG. 2 E Dimensions