Siemens QJ22B150N is a two‑pole molded‑case circuit breaker in the QJ2 family, rated for 150 A at 240 V AC with a 10 kA interrupting rating and built on the QJ frame. It employs a thermal‑magnetic trip unit for overload and short‑circuit protection. The device is UL 489 and CSA C22.2 listed and is used on P1/P2/P3/P4/P5 Siemens panelboards designed for QJ2 MCCB installations.
