Schneider Electric Square D QMB323HW Fusible Switch

Schneider Electric Square D QMB323HW Fusible Switch is a 100 A, 240 V AC, three‑pole fusible switch designed for use as a single‑branch switch within Square D QMB fusible panelboard systems. This panel‑mount unit fits a 6‑inch wide footprint and is compatible with NEMA KS1 Series E1 enclosures, making it suitable for motor loads and general distribution in commercial or industrial environments. It accepts Class H or Class K fuses as standard, with a field‑upgrade option for Class R fuses via the QMB100R kit; UL listings reflect up to 10,000 RMS symmetrical amperes available fault current when using H/K fuses, and up to 200,000 RMS AIC when Class R fuses with the kit are installed. The QMB323HW is rated for 15 horsepower at 240 V, aligning with typical small‑to‑mid‑size motor control applications and providing a compact, reliable disconnect within QMB panelboard‑based power distribution.