Protect your motor with the ABB CR123H317A Overload Relay Heater. Designed for use with CR101H relay series, this heater unit accurately responds to overload conditions, ensuring motor safety. It is packaged as a single unit for straightforward installation and replacement. Trust ABB for reliable motor protection..The ABB CR123H317A is an overload heater unit designed for CR101H starter series. It has a maximum motor full-load ampere rating of 2.76 A. The product net weight is 0.025 lb. Package dimensions are 1 inch width, 1.75 inch depth/length, and 0.5 inch height. The gross weight of package level 1 is 0.025 lb.