Siemens QJ22B150H Molded Case Circuit Breaker

The Siemens QJ22B150H is a 150-amp, 240-volt, two-pole molded‑case circuit breaker in the QJ2 family, designed for thermal‑magnetic overcurrent protection in low‑voltage distribution systems. It offers a 10 kA interrupt rating at 240 VAC and carries UL 489 and CSA 22.2 listings, making it suitable for panelboards and switchgear that require reliable short‑circuit protection. The device uses lug‑load terminals that accept 4 AWG to 300 kcmil aluminum or 6 AWG to 300 kcmil copper conductors and measures roughly 3 in wide by 2.34 in deep by 7 in tall. With a 2‑pole configuration at 150 A, it is intended for use where protective coordination is needed in 240 V circuits, providing dependable upstream protection in Siemens/ITE panel assemblies and other compatible low‑voltage distribution applications.