DTU225R Double Throw Safety Switch, non‑fusible, 2‑pole/2‑wire, 240 VAC / 250 VDC, 400 A, NEMA 3R

Square D by Schneider Electric DTU225R is a general‑duty, non‑fusible double‑throw safety switch for manual source transfer and isolation. Rated 400 A, 2‑pole/2‑wire at 240 VAC (250 VDC) in a rainproof NEMA 3R enclosure, it is UL Listed with a 10 kA short‑circuit rating when used with H or K fuses. It accepts AWG 1/0–750 kcmil Cu/Al conductors, mounts on a T‑bar grid, and measures 54.50 in H × 24.00 in W × 7.25 in D at roughly 130 lb. No factory neutral (field‑installable if required); motor rating 50 hp at 250 VDC.