This ABB Overload Relay Heater, model CR123H157B, is designed for use with CR101 starters. It provides essential thermal overload protection for motors, ensuring reliable operation and preventing damage. Packaged as a single unit, this heater is a crucial component for maintaining the integrity of your motor control systems..The ABB CR123H157B is an overload relay heater designed for CR101 starters. It has a maximum motor full-load ampere rating of 9.75A. The heater is packaged as a single unit.ABB CR123H157B Data Sheet: Click to View