Schneider Electric QMB-3800MEGW Disconnect Panel Switch

Schneider Electric's QMB-3800MEGW is a fusible panelboard disconnect switch in the Square D QMB family, designed to mount in QMB panelboards to isolate a load from its source while delivering overcurrent protection. Rated up to 800 A and up to 600 V, this 3‑pole device provides main‑disconnect capability and is compatible with Class H, R, J, L fuses or 600 Vac Class T fuses when paired with the appropriate fuse kit. The unit features a red and black operating handle with a large ON‑OFF nameplate for clear status indication, and a positive lock‑off design that accepts up to three 3/8‑inch padlocks to secure the device during maintenance. Mounting brackets are permanently attached to the switch enclosure, and a switch‑door hasp provides additional security through the latching mechanism. As part of Schneider Electric’s QMB Fusible Panelboards, this switch offers both disconnect and protection for large‑load circuits and is UL‑listed for use on systems up to 200,000 rms symmetrical amperes available fault current when the proper fuse kit is installed. The assembly is intended for panelboards and switchboards in commercial and industrial settings, delivering reliable isolation and short‑circuit protection while maintaining clear visual indication of blade position through the ON‑OFF nameplate.