Cutler-Hammer MSH8.8A Thermal Overload Heater Unit is a heater accessory used in Cutler-Hammer motor protection systems to provide thermal overload sensing. It is also listed under variant identifiers MSH88A and MSH-8.8A. This heater unit acts as the heat-generating element in the overload protection circuit, pairing with compatible relays or starters to protect motors from overload conditions.
