Square D DU321 30 Amp Non Fusible Safety Switch

Square D DU321 is a 30 A, non-fusible general-duty safety switch designed to serve as a code-compliant disconnect for 240 V three-phase circuits in residential and light-commercial environments. This 3-pole, 3-wire, single-throw disconnect is housed in a NEMA 1 indoor enclosure as part of Schneider Electric's Series E2 DU family, with UL listing and a 100 kA at 240 V interrupt rating. As a non-fusible switch, it provides straightforward on/off isolation for motors, pumps, conveyors, and other equipment up to 30 A, without integrated fusing. The DU321 is intended for indoor installations requiring a durable, economical disconnect for general-duty applications; it supports 240 VAC operation and aligns with common safety practices for disconnecting three-phase loads in lightweight commercial or residential settings. With three poles and a compact footprint, it integrates with standard Square D safety-switch accessories and mounting configurations, making it a practical choice for dedicated 240 V disconnects in equipment rooms, mechanical spaces, or service panels.