Siemens QJ23B150H Molded Case Circuit Breaker

Siemens QJ23B150H Molded Case Circuit Breaker is a 150 A, 240 V AC, three-pole protective device in the QJ frame. It is a molded‑case breaker with a thermal‑magnetic trip mechanism that provides long‑time and instantaneous protection for feeders and branch circuits wired in low‑voltage distribution panels. Retail and distributor listings commonly note load‑side lug terminals for terminating conductors, aligning with typical wiring configurations for panel installations. The model is listed with a short‑circuit interrupting rating of 42 kA at 240 V in multiple catalog entries, underscoring its suitability for moderate fault currents in commercial or light industrial setups; however, ratings can vary by market or exact variant within the QJ23B family, so the precise Icu should be verified on the exact order or listing. As part of Siemens’ QJ molded‑case lineup, the QJ23B150H represents a compact solution that combines rugged construction with straightforward protective functions for 3‑phase distribution systems, balancing conductor protection, coordination with upstream devices, and ease of integration into standard Siemens panels.