Schneider Electric QMB-363-TW Fusible Switch Disconnect

QMB363TW is a 3‑pole fusible panel switch (fusible disconnect) in the Square D by Schneider Electric QMB family, rated 100 A at 600 V AC, designed to disconnect loads while providing overcurrent protection with integral fuse provisions in panelboards and switchboards. This twin, 2‑module unit carries a factory‑mounted main switch on the bus assembly and is approved for use as service equipment; it accepts Class R fuses (Class J fuses with the appropriate fuse kit) and is UL Listed for systems up to 200,000 A RMS available fault current when installed with the proper fuse kit. The 15 HP motor rating expands its suitability for motor loads, while its mechanical features include positive lock‑off provisions for three 3/8 in. padlocks, a dual‑cover interlock, a red and black ON‑OFF handle, a large ON‑OFF nameplate, and a switch door hasp to secure the enclosure. Designed for QMB panelboards and similar distribution gear, it provides a clear, code‑compliant disconnect with fused protection in commercial or light industrial applications. Note that Schneider Electric lists the QMB363T as discontinued from commercialization in 2024; however, two‑module variants such as QMB363TW continue to appear in distributor catalogs, so availability may vary by region.