GTH22,GTH40,GTH85 thermal overload relay GTH series thermal overload relay are suitable for overload and phase-failure protection of AC motors with frequency of ... duty. Several functions provided by these relays are: Phase-failure protection, temperature compensation, ON/OFF indication, Stop button, Test button and ... -65.06554.0-75.07463.0-85.0 Thermal Overload Relay/Thermal Relay/GTH thermal relay