Markdown Siemens JK3B150 – 150A 3 Pole Molded Case Circuit Breaker

Designed for heavy electrical loads, the Siemens JK3B150 is a 3-pole, 150A molded case circuit breaker. It delivers reliable long-time and instantaneous trip functions. This J-frame device features a bolt-on connection compatible with Siemens P4, P5, SB1, SB2, and S5 panelboards. It is replaced by the FXD63B150, which requires new mounting hardware. With a 25kAIC rating at 240VAC, it offers fixed thermal and adjustable magnetic protection. It is HACR rated and approved for reverse feed.