Eaton H1105 Industrial Thermal Magnetic Overload Relay

The Eaton Cutler-Hammer H1105 is a heater-element accessory used with industrial thermal-magnetic overload protection in motor-control circuits. This Type H heater element is energized by the motor current and drives the bimetal sensing inside a thermal overload relay, triggering a trip when overheating or excessive current is detected, with reset behavior that depends on the connected relay configuration. rated for 0.25–0.3 A, it is designed to work with matching Cutler-Hammer overload relays and motor starters in Eaton’s motor-control lineage. In typical installations, the heater sits in the overload circuit alongside the contactor coil, so a trip disrupts power to the motor to prevent damage from overload conditions. Common applications include safeguarding three-phase motors in industrial environments such as conveyors, pumps, fans, and processing lines where reliable overload protection and coordinated control are essential. The H1105 is part of Eaton’s legacy Cutler-Hammer ecosystem, built to integrate with Eaton’s family of overload relays and control contacts to deliver dependable trip-point protection while enabling straightforward maintenance and reset when needed.