1SAZ211201R2051

ABB 1SAZ211201R2051 TA25DU-25M Thermal Overload Relay is an electromechanical motor-protection device designed to protect three-phase motors against overload and phase-failure conditions. The relay provides an adjustable current setting from 18 A to 25 A, allowing its thermal protection threshold to be matched to the motor's rated current. Its Trip Class 10A is intended for standard motor-starting applications. The TA25DU-25M is designed for direct connection to compatible ABB block contactors, creating a compact motor-starter assembly. Key functions include temperature compensation, trip-free operation, STOP and TEST functions, trip indication, and selectable manual or automatic reset. It also incorporates one NC trip contact and one NO signal contact, which can be used for contactor control, fault alarms and PLC feedback.