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

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Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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)Interrupting RatingOpeningSizeStockSamplesCompare
LLSRK.1000.120 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.1500.1520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.2000.220 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.2500.2520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.3000.320 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.4000.420 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.5000.520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.6000.620 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK.8000.820 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK001120 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK01.41.420 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK01.61.620 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK01.81.820 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK1.121.12520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK1.251.2520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK002220 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK02.52.520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK02.82.820 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK2.252.2520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK003320 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK03.23.220 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK03.53.520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK004420 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK04.54.520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK005520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK05.65.620 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK006620 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK6.256.2520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK007720 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK008820 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK009920 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0101020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0121220 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0151520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK17.517.520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0202020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0252520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0303020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0353520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0404020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0454520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0505020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayCheckOrder
LLSRK0606020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayIndustrial CartridgeCheckOrder
LLSRK0707020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK0757520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK0808020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK0909020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK10010020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK11011020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK12512520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK15015020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK17517520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK20020020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK22522520 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK25025020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK30030020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK35035020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK40040020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK45045020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayCheckOrder
LLSRK50050020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder
LLSRK60060020 kA @ 300 VdcSlo-Blo/Time Lag (T)/Time DelayKnife-BladeCheckOrder

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