ABB TF42-3.1 Thermal Overload Relay

ABB TF42-3.1 Thermal Overload Relay is a three-pole motor protection device in ABB’s TF42 family, designed to be used with 3-pole contactors to protect induction motors from overload. It provides adjustable thermal protection for each pole with a current setting range of 2.3 to 3.1 A and a trip class of 10. The relay features type gG short-circuit protection coordination with a 10 A device and per-pole resistance of 187.30 mΩ, with pole power loss specified at 1.0–2.0 W. This unit is intended for use in industrial motor control panels to safely disconnect a motor when overloaded, offering economical protection within ABB’s motor starter ecosystem.