Siemens QJ23B225 Molded Case Circuit Breaker

Siemens ITE QJ23B225 is a three‑pole molded‑case circuit breaker in the QJ2 frame, rated for 225 A at 240 VAC. It employs a thermal‑magnetic trip to provide overload and short‑circuit protection for 3‑phase circuits and carries a 10 kA interrupting capacity at 240 V. This bolt‑on unit is designed for low‑voltage distribution and can be configured with load‑lug terminals, aligning with common Siemens QJ2 family applications. With its 225 A rating and 240 V rating, it protects feeder and branch circuits in commercial and light industrial installations, offering reliable protection for equipment and wiring against overcurrent conditions in 3‑phase power systems. The QJ23B225 is part of Siemens’ QJ molded‑case lineup, sharing the QJ2 frame's compact footprint and mounting compatibility within Siemens control gear. Its 3‑pole construction ensures simultaneous interruption of all three phases, which is essential for safe operation with balanced or unbalanced 3‑phase loads. This model is widely stocked by distributors and is commonly used for protecting feeders and branch circuits in 3‑phase power distributions.