The ABB TF42-35 thermal overload relay provides economic and reliable electromechanical protection for your main circuits and motors. It ensures fast protection against overload and phase failure, featuring temperature compensation, selectable automatic or manual reset, a trip-free mechanism, and a trip indication. This relay is designed for direct connection to block contactors, with single mounting kits available as an accessory..The ABB TF42-35 is a thermal overload relay with trip class 10. It offers temperature compensation, a normally closed (NC) trip contact, and a normally open (NO) signal contact. The reset function can be set to automatic or manual. It includes a trip-free mechanism and a STOP function with trip indication. The relay is designed for direct connection to block contactors.