Schneider Electric QMB-324W Fusible Panelboard Switch

QMB324W is a Schneider Electric Square D fusible panelboard switch, a 200 A, 240 V, 3‑pole switch unit with a 9‑inch footprint designed for use in QMB fusible panelboards. It provides overcurrent and short‑circuit protection and acts as a disconnect between load and source, rated up to 60 HP at 240 VAC. The unit accepts Class H or Class K fuses, with Class R fuses supported when the HRK1020 kit is installed, and it ships with aluminum mechanical lugs, with copper and crimp lug options available. It is UL and CSA listed and, as of August 5, 2024, was discontinued—marking the end of commercialization, though after‑sales service remains available until its end of life.