Eaton / Cutler-Hammer KB3125 – 125A 3 Pole Molded Case Circuit Breaker Last Chance

Engineered for commercial applications, the Eaton KB3125 provides robust overcurrent protection within a compact K-Frame footprint. This 125A, three-pole device utilizes fixed thermal and adjustable magnetic trip units. Designed for seamless integration, it mounts into legacy Westinghouse CDP panelboards, Eaton Series C enclosures, and switchboards. Rated for 25kAIC at 240VAC, this HACR-rated component ensures dependable performance. It is commonly replaced by the newer JD3125 series.