Bussmann JJS-500 NSNBC01 Time-Delay Slo-Blo Fuse

The Bussmann JJS-500 is a 500 A Class T fuse from Eaton’s Bussmann series, engineered for current-limiting protection in 600 V AC circuits. This non-indicating device uses bolted blade-end terminals for secure mounting and offers a compact footprint ideal for tight panels and motor-control centers, with VFD line protection as a primary application. With a 200 kAIC interrupting rating at 600 V, it delivers robust fault protection and fast interruption to minimize energy let-through in the event of a short or fault, while its time-delay characteristics support normal motor starting and transient conditions common in industrial equipment. Typical uses include protection of industrial motors, drives, pumps, compressors, and other heavy-load electrical equipment in manufacturing, processing, and utility settings, where reliable, code-compliant protection for 500 A circuits is required. Manufactured by Eaton Bussmann, the JJS-500 is part of a broad low-voltage fuse family designed for industrial electrical protection, and is commonly used by OEMs and service technicians in panel builds and retrofit projects.