The ABB TF140DU-110 is an economic and reliable electromechanical thermal overload relay designed for the main circuit. It provides fast and dependable protection for motors against overloads and phase failures. This relay features temperature compensation, selectable automatic or manual reset, a trip-free mechanism, and a trip indication. It is designed for direct connection to block contactors, ensuring seamless integration into your motor control systems..The ABB TF140DU-110 is a thermal overload relay with a rated current of 110A and a setting range of 80-110A. It has a rated insulation voltage (Ui) of 690 volts and operates within an ambient air temperature range of -25 to +55 degrees Celsius. This relay features 3 poles and is compatible with TA/TF contactors. It includes one normally closed (NC) trip contact and one normally open (NO) signal contact. The dimensions of the relay are 140 mm in height, 89 mm in width, and 126 mm in depth, with a weight of 0.82 kg.