Schneider Electric Q2M-3150-MT Circuit Breaker

Schneider Electric’s Square D Q2M3150MT is a 3-pole, 150-amp molded-case circuit breaker in the Q2M family, designed for 240-volt systems. It features bolt-on mounting with top-mounted, load-side lug terminals and uses a thermal-magnetic trip with Long-Time and Instantaneous (LI) functions to provide overload and short-circuit protection. The unit offers a 10 kA interrupting rating at 240 VAC and is UL-listed for use as a main circuit breaker in compatible panels. As a legacy Q2M model, several distributors note it as discontinued by the manufacturer, though new-old-stock or reconditioned units may still be available from third-party sellers. Typical applications include service equipment protection and feeder protection in commercial and industrial distributions where a compact, bolt-on MCCB with LI protection is required. This 150 A, 240 V, 3P breaker is built for rugged duty in demanding electrical environments, delivering reliable protection for distribution panels and switchgear that rely on a main breaker to guard downstream circuits.