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Series: LLNRK
LLNRK Series - UL Class RK1 Dual Element Time-Delay Fuse
Littelfuse LLNRK and LLSRK series POWR-PRO™ fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes.

LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.

Applications:
  • All general-purpose circuits
  • Motors
  • Transformers
  • Solenoids
  • Fluorescent lighting
  • All system components with high in-rush currents
Features:
  • Extremely current limiting — Reduces damage to circuits and equipment under short-circuit conditions. Stops damaging short circuits faster than any mechanical protective device.
  • 300kA Interrupting Rating — Littelfuse self-certified to 300,000 amperes as standard. Meets future trend towards higher available short circuit currents.
  • Reduced costs — Current limiting design often permits use of readily available, less costly equipment. Low resistance design reduces power consumption and utility bills.
  • Excellent time delay — True dual-element construction, with separate non-fatiguing thermally-reversible spring-loaded thermal overload element, withstands repeated surges within rated time delay without opening needlessly. Eliminates needless downtime caused by power surges or equipment demands.


Electrical Characteristics

Access specifications, certifications, check availability and order parts below:

Check distributor stock availability by clicking on the [CHECK] link. View certification PDF files by clicking on the certification logo. View the part details by clicking on the part number. To order sample parts, click on the [ADD] link. Click on the 'Key' button to view definitions for each column header. Sort parts by clicking on the column you wish to sort by.


CatalogNo Certs. Amps (A) VAC (V) VDC (V) IR Stock Sample
Cart
LLNRK.100 0.1 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK.150 0.15 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK.200 0.2 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK.300 0.3 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK.400 0.4 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK.500 0.5 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK.600 0.6 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK.800 0.8 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK001 1 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK002 2 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK003 3 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK004 4 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK005 5 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK006 6 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK007 7 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK008 8 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK009 9 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK01.4 1.4 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK01.6 1.6 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK01.8 1.8 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK010 10 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK012 12 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK015 15 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK02.5 2.5 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK02.8 2.8 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK020 20 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK025 25 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK03.2 3.2 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK03.5 3.5 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK030 30 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK035 35 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK04.5 4.5 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK040 40 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK045 45 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK05.6 5.6 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK050 50 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK060 60 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK070 70 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK080 80 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK090 90 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK1.12 1.125 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK1.25 1.25 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK100 100 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK110 110 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK125 125 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK150 150 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK17.5 17.5 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK175 175 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK2.25 2.25 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK200 200 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK225 225 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK250 250 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK300 300 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK350 350 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK400 400 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK450 450 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK500 500 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK6.25 6.25 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]
LLNRK600 600 250 125 20000A@125VDC
300000A@250VAC 		[Check] [Add]