Siemens QJ23B225 3 Pole 225 Amp Circuit Breaker

The Siemens QJ23B225 is a three-pole, 225-amp molded‑case circuit breaker from the QJ2 family, designed for 240V AC circuits in industrial and commercial panelboards and switchboards. It provides a 10 kA short-circuit current rating at 240V and is built on the QJ frame, suitable for three‑phase distribution up to 225A with line and load terminations configured for lug connections on the load side. This model supports long-time and instantaneous trip functions to protect conductors and equipment from overloads and faults, aligning with Siemens Gould/ITE heritage devices used in higher‑current protection scenarios within electrical rooms, switchgear, and feeder panels. As a legacy QJ2 device, it integrates with older Gould panels while delivering reliable protection performance for feeders, main breakers, and distribution blocks in commercial and light industrial environments.