Schneider Electric's Square D H321N Heavy Duty Safety Switch is a fusible, indoor-rated disconnect designed for 3‑phase power. It is a 30 A, 4‑wire, 3‑pole unit with a neutral installed, rated for 240 VAC (and 250 VDC in some configurations) in a NEMA 1 enclosure. The switch handles up to 7.5 HP at 240 VAC and serves as a dedicated motor disconnect or power isolation device in industrial control and electrical distribution applications. This H321N is part of Schneider Electric's Square D heavy‑duty safety switch family and is documented in the H321N data sheet.
