Siemens / ITE HJ3B400 – 400A 3 Pole Molded Case Circuit Breaker Premium

Engineered for commercial power distribution, the Siemens HJ3B400 restores functionality to aging electrical infrastructure. This 3-pole, 400A molded case breaker provides reliable thermal-magnetic protection. Designed as an exact drop-in replacement, it bolts securely into legacy Siemens and ITE P4 or P5 panelboards. It serves as the cross-reference for the HJD63B400, ensuring a seamless fit. Rated for 65kAIC at 480VAC, this M-Frame breaker features an interchangeable trip unit.