This listing is for a USED Square D QMB365W. This unit is designed to serve as a plug‑in busway disconnect switch used to provide local power isolation for bus duct distribution systems in industrial and commercial electrical installations.

This listing is for a USED Square D QMJ365 Fusible Branch Switch. It is a 400A, 600V AC, 3‑pole fusible panelboard switch designed for reliable load disconnect and overcurrent protection. This unit is part of the QMJ Series and is commonly used in QMB/QMJ fusible panelboards. It supports horsepower ratings up to 350 HP at 600VAC and accepts Class J fuses for robust system protection.

This listing is for a USED Square D QMB361TW Fusible Panelboard Switch. It is a 30A, 600V AC, 3‑pole twin‑style switch designed for QMB Series E1–E2 panelboards. This unit serves as a fusible disconnect device and supports Class R/H/K fuses for reliable overcurrent protection. It features a compact 4.5‑inch height design and is suitable for industrial and commercial power distribution applications.