Eaton ,WMS1B40, circuit breakers have a proven track record of reliability that dates back to the 1920's and serve in a variety of applications in several different industries. These products are engineered for supplementary protection and branch circuit protection. Best-in-class quality, safety, and reliability provide optimum protection of people, plant and installations. <p>Eaton circuit breakers are used for internal and external receptacles, branch circuit protection, external motors and heating, refrigeration equipment and air conditioning. We carry Eaton small frame breakers, large frame breakers, thermal magnetic breakers, magnetic molded case breakers and accessories.