Schneider Electric Square D DU321 Safety Switch

Schneider Electric's Square D DU321 Safety Switch is a 30-amp, 240-volt, three-pole, non-fusible general-duty safety switch. Housed in a galvanized steel NEMA 1 enclosure for indoor use in dry locations, it provides a rugged and straightforward means to safely isolate power to 3‑phase equipment. As a non-fusible disconnect, the DU321 is designed for three-wire, 240 VAC circuits and is compatible with standard Square D accessories for mounting in standalone installations or panel-mounted setups. This model is part of the Square D DU general-duty family and is intended for applications that require a dependable, mechanically actuated disconnect in residential and light commercial electrical distributions. The galvanized enclosure offers corrosion resistance in indoor environments, helping ensure long-term reliability in demanding service conditions.