Siemens Q340H U Three-Phase Molded Case Circuit Breaker

Siemens Q340H U is a three-phase molded case circuit breaker rated for 40 A at 240 V, designed for plug-in installation in commercial and industrial electrical systems. This 3-pole MCCB provides thermal-magnetic overcurrent protection with a long-time and instantaneous trip, and it carries a 22 kA interrupting rating at 240 V, enabling rapid disconnection for short circuits on three-phase feeders. It features line- and load-side lug terminals for straightforward wiring and is intended to protect branch circuits feeding motors, transformers, and other loads in three-phase networks. As part of Siemens' Q-series MCCBs, the Q340H U is built for plug-in compatibility with compatible Siemens panels and accessories, offering a compact, modular solution for reliable three-phase protection in industrial electrical distribution.