The Siemens QJ23B225 is a Type A, 3 Pole, 225 Amp Circuit Breaker designed for industrial applications. This Main Breaker features a Thermal Circuit Breaker with an instantaneous break time, controlled by a switch mechanism. It is made of ABS/plastic material, ensuring durability and reliability in various electrical settings. With a maximum amperage of 225A, this Circuit Breaker by Siemens is a high-quality component for ensuring the safety and functionality of electrical circuits in industrial environments.