Top Rated Siemens JD23B400 – 400A 3 Pole Molded Case Circuit Breaker

Rated 65 kAIC at 240VAC, this 400A MCCB delivers reliable thermal-magnetic protection. The JD2 Series device features a fixed thermal and adjustable magnetic trip unit. Designed for bolt-on mounting, it installs into Siemens Sentron panelboards, switchboards, and motor control centers. This legacy J-frame breaker is replaced by the JD63B400 model. Standard features include an HACR rating and factory-installed lugs for dependable long-time and instantaneous (LI) protection.