ABB TF42-0.55 is a three-pole thermal overload relay in the TF42 family, designed to protect motors in ABB motor starters when used with compatible 3-pole contactors. It has a per-pole full-load current rating of 0.55 A and an adjustable setting range from 0.41 to 0.55 A, enabling precise thermal protection for small to mid-size motors. The relay uses a bi-metallic thermal element and is specified for coordination with standard protection devices (Type gG); the exact configuration for this model is 1SAZ721201R1017.
