The Cutler Hammer Circuit Breaker CHB3100 is a 3-phase, 100A, 240V thermal circuit breaker suitable for both interior and exterior walls. It features Type A tripping characteristics, thermal overload protection, and comes in a gray color. This main breaker has a maximum amperage of 100A, is rated for 201-250V AC, and is designed for commercial applications. With a bolt-on mounting style and box lugs electrical connection, this Cutler Hammer circuit breaker offers reliable protection and control for electrical circuits.