Siemens / ITE CJ3B400 – 400A 3 Pole Molded Case Circuit Breaker Buy Direct

Rated 100 kAIC at 480VAC, this 400A molded case circuit breaker utilizes integrally fused Amp-Trap limiters to isolate severe electrical faults. The CJ3B400 installs into existing ITE and Siemens switchboards or motor control centers, providing a seamless replacement solution for aging infrastructure. By combining fixed thermal and adjustable magnetic trip functions, it ensures precise overcurrent protection for heavy-duty commercial and industrial applications.