Part LLNRK04.5 is a 4.5A member of the Littelfuse LLNRK Series with a 250V AC / 125V DC rating. The fuse uses POWR-PRO Class RK1 fuse technology with 200kA AC rated interruption on the primary AC rating. Confirm application details against the manufacturer datasheet.
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LLNRK04.5 is Littelfuse’s 4.5A configuration in the LLNRK Series, built as a Dual-Element Time-Delay Class RK1 Fuse for 250V AC / 125V DC service. For installation, use the specified cartridge / clip arrangement; the Class R device is rated for 200kA AC interruption. Published dimensions for this rating/configuration are 50.8mm length; 14.3mm max body diameter. POWR-PRO Class RK1 construction emphasizes very strong current limitation for equipment-protection upgrades. Typical uses cover general-purpose circuits, Motor, Transformer, Safety Upgrades. Check UL 248-12|Federal Specification WF-1814 and the manufacturer datasheet before final selection.
