Square D H321N Fusible Safety Disconnect Switch is a heavy‑duty, indoor-rated three‑pole disconnect for 30 A circuits at 240 V. This fusible switch accepts Class R fuses and delivers up to a 200 kA short‑circuit rating at 240 V, with a Type 1 (NEMA 1) enclosure suitable for indoor installations. It is rated for up to 7.5 hp at 240 V (and 250 V DC in applicable configurations), providing a dedicated isolation point for motors and other equipment during maintenance or fault conditions.
