Schneider Electric's Square D QMB364W is a 200 A, 600 V, 3‑pole fusible switch unit designed for QMB fusible panelboards, and is a 1‑module, panel‑mount enclosure that is 9 inches wide. The NEMA 1 enclosure accepts Class R fuses and provides a reliable main switching/disconnect function, rated for up to 150 HP at 600 VAC. It is compatible with QMB E1–E2 panel boards and distributes protection for feeders in light commercial or industrial installations, offering a short-circuit current rating up to 200 kA at 480 V.
