Eaton’s Cutler-Hammer Type BW main breakers protect the entire loadcenter and can also be used as a service disconnect. This main breaker delivers electricity to the branch circuit breakers within the loadcenter. This breaker can either be factory installed or sold separately depending on the model and installation. Type BW breakers are UL approved genuine replacement breakers for loadcenters made by Westinghouse, Challenger, and Bryant. They are available in 2-poles from 100 AMP up to 225 AMP.