Siemens QP330 U Three-Phase Molded Case Circuit Breaker

Siemens QP330 U is a three-pole molded‑case circuit breaker in the QP family, rated for 30 A at 240 V AC and designed for plug‑in panelboard protection of three‑phase circuits. It provides thermal‑magnetic overcurrent protection with a 10 kA interrupt rating at 240 V, making it suitable for safeguarding three‑phase motors and other heavy loads in commercial and light‑industrial panels. The device is built for plug‑in mounting in Siemens panelboards and distribution boards, with compatibility to the QP series accessories and standard 3‑pole configurations. Typical applications include motor circuits, feeders, and other three‑phase branch circuits in commercial facilities where reliable overload and short‑circuit protection is required. For proper installation, refer to the Siemens QP product catalog and local electrical codes for wiring, torque, and mounting specifications.