ABB TF42-24 Thermal Overload Relay is a three-pole, electromechanical protection device designed for the main motor circuit, part of ABB’s TF42 family. It provides overload protection for motors with a full-load current rating of 24.0 A and a current setting range of 20.0–24.0 A, with a trip class of 10 for predictable response to excessive current. The unit corresponds to part number 1SAZ721201R1051 and is marketed as an economical protection option for motor-control panels. Used to interrupt the motor circuit on overload, the TF42-24 offers a compact, robust solution for thermal protection in industrial electrical installations.
