Siemens Q31500S01 Three-Phase Circuit Breaker

Siemens Q31500S01 is a 15 A, 240 V, three-pole molded-case circuit breaker in the Siemens QP/MP family that provides thermal-magnetic overcurrent protection for three-phase loads and includes a factory-installed 120 V shunt-trip for remote disconnection. Designed for distribution panels, it uses Insta-Wire termination for quick field wiring and carries a 10 kA short-circuit interrupt rating, enabling reliable protection in commercial and light industrial installations. Rated for 240 VAC line voltage with a 120 VAC shunt-trip coil, the device is UL 489 listed and compatible with QP/MP frame gear. The 3-pole configuration supports balanced three-phase circuits, and the 15 A continuous rating makes it suitable for protecting branch circuits, motors, or equipment in service entrances, mechanical rooms, data centers, or manufacturing environments where remote trip capability is required. This exact model, Q31500S01, delivers precise 15 A protection with a remote-trip option, combining standard thermal-magnetic trip with a signaling-controlled shutoff that can be triggered by an external control circuit.