Bussmann NSB FRS-R-8 High Interrupting Cartridge Fuse

Bussmann NSB FRS‑R‑8 High Interrupting Cartridge Fuse is an 8‑amp, 600 VAC (600 V) / 300 V DC time‑delay, dual‑element fuse from the Bussmann FRS‑R family (Class RK5) designed for high interrupting duty. It uses ferrule‑end terminations and is non‑indicating, meaning it does not show fault status visually. The fuse offers a 200 kA interrupting rating at 600 VAC and 20 kA at 300 VDC, enabling rapid isolation of severe faults while tolerating brief overloads typical of motor start‑up surges. As a current‑limiting, time‑delay device, it protects motor and power‑distribution circuits from short circuits without nuisance openings, making it suitable for motor control applications, feeders, and panels that require dependable short‑circuit and overload protection with compatible RK5 fuse holders that accept ferrule ends.