Steven Levy Enterprises buys and sells new, unused, and used industrial surplus electrical breakers and controls. Browse our inventory of used electrical breakers and controls available for purchase. A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit. Circuit control devices have many different shapes and sizes, but most circuit control devices are switches, solenoids or relays. Tell us what surplus electrical breakers and controls you have for sale or call us at 713-910-4337.