Schneider Electric H321-NRB Heavy Duty Fusible Safety Switch

Schneider Electric's Square D H321NRB heavy-duty fusible safety switch is a 30 A, 240 VAC three-pole, four-wire disconnect designed for reliable isolation of motor circuits in rugged industrial environments. The NEMA 3R enclosure supports indoor or outdoor installation, with bolt-on hub provisions and neutral installed for 4-wire systems. Rated for up to 7.5 hp at 240 VAC, it is commonly used as the fused disconnect for pumps, conveyors, fans, and other inductive loads in commercial and light-industrial applications. This safety switch provides a clearly visible open position and fused protection, forming a robust, code‑compliant disconnect in Square D’s lineage of heavy-duty power‑control equipment from Schneider Electric.