Square D DTU363DS Three Phase Manual Transfer Switch

Square D DTU363DS is a 100 A, 3-pole, non-fusible manual transfer switch designed to safely transfer a three‑phase load between two power sources. Part of Schneider Electric’s DTU safety-switch family (Series F6), it employs three Form C (3PDT) contacts for reliable, three‑line switching and supports a 600 VAC / 600 VDC service. The unit is housed in a corrosion‑resistant 304 stainless steel enclosure with a NEMA 4/4X/5 rating, suitable for indoor or outdoor installations exposed to dust, water, or corrosive environments. Its dimensions are 11.5 in wide, 7.12 in deep, and 30.26 in high, and it is UL 98 listed with CSA/NOM approvals. This manual transfer switch is intended to transfer a load between two sources—such as utility power and an auxiliary generator—via a hands‑on operating mechanism, making it a straightforward option for backup power or critical process reliability.