The ABB TA75DU63/DB80 is a thermal overload relay (TOL) with a Class 10 trip curve, covering the 45-63 A adjustment range. It sits between the contactor and the motor in a standard motor-starting circuit, protecting against sustained overcurrents that could damage the winding insulation.
Mounts directly onto the matching ABB contactor (typically the A-line series) via the built-in rail clip. The Class 10 trip characteristic means it will open within 10 seconds at 600% of the full-load current setting — standard for standard-duty induction motor starts that don't drag on startup.