Square D H221N Fusible Safety Disconnect Switch

The Square D H221N is a heavy‑duty fusible safety disconnect switch designed for indoor use in single‑phase electrical circuits. Rated for 30 amperes at 240 VAC, it is a 2‑pole, 3‑wire device with a neutral (N) and a NEMA 1 Type 1 indoor enclosure, making it suitable for basements, mechanical rooms, and other controlled environments. This fusible disconnect provides safe isolation of circuits and protection through replaceable fuses, with a single‑throw operating configuration for quick on/off control at the equipment boundary. The unit delivers up to 7.5 horsepower at 240 VAC (and up to 250 VDC in applicable configurations), reflecting its capability to handle small to mid‑size motor and control loads. The H221N variant is part of Square D’s heavy‑duty safety switches family, engineered for durable performance in demanding environments while meeting standard indoor installation requirements. Use cases commonly include motor starters, conveyors, fans, and other 1‑phase loads where a dedicated, code‑compliant disconnect is required close to the equipment. Note this description reflects the 30A, 240 VAC, 2P, 1PH, Type 1 indoor specification and the presence of a neutral terminal as part of the 3‑wire configuration.