Class RK5

Littelfuse offers five series of current-limiting Class RK5 fuses for superior short-circuit protection. Each boasts dual-element design and time-delayed performance that eliminates nuisance opening. Fuses in FLSR_ID also have built-in blown-fuse indicators. Class RK5 fuses are often used to protect circuits for service entrance switches, transformers, distribution panelboards, and fluorescent lights. Littelfuse UL Class RK5 product offering provides energy efficient advanced protection with its dual-element, time-delay construction and is available with optional open fuse indication on select ratings. Littelfuse offers five different series of class RK5 fuses - the IDSR series, FLSR_ID series, FLNR_ID series, FLSR series and FLNR series.