Siemens Q240 Circuit Breaker

The Siemens Q240 is a 40-amp, 2-pole molded‑case circuit breaker designed for 120/240 V AC residential and light commercial distribution, providing overcurrent protection for branch circuits in load centers and feeders. It belongs to the Type QP/MP family and features Insta-Wire terminals for quicker, field connections, along with a thermal‑magnetic trip that delivers both overload and short‑circuit protection. This specific 2‑pole unit is rated for 120/240 V operation with a 10 kA interrupting rating and is offered in a plug‑mounting configuration to fit compatible Siemens panels. Used to protect circuits feeding appliances and outlets in homes and small businesses, the Q240 combines compact form with robust, code‑compliant protection for everyday electrical infrastructure.