Circuit Breakers for Oil, SF6 and Substation EquipmentLooking for a foreign made or unusual circuit breaker model? Circuit Breaker Sales NE has access to North America’s largest inventory of overcurrent protective devices that date back to World War II. As such, Circuit Breaker Sales NE can supply any number of foreign made and unusual circuit breakers, as well as oil circuit breakers, SF6 breakers and substation equipment.