LLSRK Series - UL Class RK1 Dual Element Time-Delay Fuse

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Littelfuse 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.

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.

Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)VAC (V)VDC (V)Interrupting RatingOpeningSizeStockSamplesCompare
LLSRK.1000.160030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.1500.1560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.2000.260030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.2500.2560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.3000.360030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.4000.460030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.5000.560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.6000.660030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.8000.860030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK001160030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK01.41.460030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK01.61.660030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK01.81.860030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK1.121.12560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK1.251.2560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK002260030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK02.52.560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK02.82.860030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK2.252.2560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK003360030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK03.23.260030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK03.53.560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK004460030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK04.54.560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK005560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK05.65.660030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK006660030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK6.256.2560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK007760030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK008860030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK009960030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0101060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0121260030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0151560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK17.517.560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0202060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0252560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0303060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0353560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0404060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0454560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0505060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0606060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0707060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK0757560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK0808060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK0909060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK10010060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK11011060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK12512560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK15015060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK17517560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK20020060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK22522560030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK25025060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK30030060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK35035060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK40040060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK45045060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK50050060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK60060060030020000A@300VDCSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder

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