Bussmann FNR-R-110 Fuse

FRN-R-110 is Bussmann’s Fusetron Class RK5 dual-element time-delay fuse rated for 110 A at 250 VAC (125 VDC). The device is non-indicating and achieves an interrupting rating up to 200 kA at 250 VAC and 20 kA at 125 VDC, balancing protection with tolerance for brief overloads. As part of the FRN-R RK5 family, this 110 A fuse is designed for use in RK5 fuse blocks and equipment protected to 250 VAC, with its dual-element time-delay construction helping to prevent nuisance trips during startup transients while guarding against sustained faults. In catalog listings it is referred to as FRN-R-110 or FRNR-110. This part is commonly specified in electrical protection schemes that require robust, high-current protection within 250 VAC systems, and it is the 110 A variant of the widely used FRN-R/Fusetron RK5 series.