Bussmann JJS-300 Fuse

Bussmann (Eaton) JJS-300 is a Class T, current-limiting fuse rated for 300 A and 600 VAC, designed for protection of high‑current power electronics and motor‑drive circuits. It uses bolted blade‑end terminations for secure mounting in standard Bussmann fuse blocks and provides a high interrupting capacity of up to 200 kAIC at 600 V, enabling rapid fault clearance in demanding industrial environments. As part of the JJS family, the fuse is intended for VFD line protection and compact, space‑savvy panel integration. The device is non‑indicating, meaning there is no built‑in visual status indicator, and it is intended to blend fast protection with reliability in harsh applications. Typical uses include protection for AC motor drives, variable‑frequency drives, and other high‑current feeders where a 300 A, 600 V class‑T fuse is appropriate.