Siemens FJ3B100 – 100A 3 Pole Molded Case Circuit Breaker Top Rated

Engineered for robust power distribution, this 100A, 3-pole molded case circuit breaker utilizes fixed thermal and magnetic trip elements to protect against overloads and short circuits. It mounts securely into legacy Siemens and I-T-E enclosures, specifically fitting FC, CDP, and SB panelboards. While this FJ-type frame is an older design, it remains a vital replacement component and is superseded by the FD63B100. The breaker operates safely up to 600VAC, offering a 22 kAIC rating at 240VAC.