The ABB TF42-29 is an economic and reliable electromechanical thermal overload relay designed for the protection of the main circuit. It provides fast and dependable protection for motors against overload and phase failure. This relay features temperature compensation, selectable automatic or manual reset, a trip-free mechanism, and a STOP function with trip indication. It connects directly to block contactors, with single mounting kits available as an accessory..The ABB TF42-29 is a 3-pole thermal overload relay with a rated current (In) and rated operational current (Ie) of 29A. It has a setting range of 24-29A and a trip class of 10. The relay is designed for direct mounting on contactors and features a rated insulation voltage (Ui) of 690V. It includes a normally closed (NC) trip contact and a normally open (NO) signal contact. The operating ambient air temperature range is -25 to +60 degrees Celsius, with compensation also within this range. Storage temperature is -50 to +80 degrees Celsius.