ABB TF42-10 Thermal Overload Relay

ABB TF42-10 Thermal Overload Relay is a three-pole, adjustable overload protection device for motor circuits. It features a setting range of 7.6–10 A and a trip class of 10, delivering a 10 A full-load current rating when set at the upper limit. Rated for operation at 50/60 Hz and up to 690 V AC (Ue), this TF42-10 is part of ABB’s TF42 family described as an economical electromechanical protection device for the main circuit. The part number for this model is 1SAZ721201R1043. In practical terms, it protects industrial motors in the main circuit, guarding equipment such as pumps, fans, or conveyors from overload conditions across all three phases. The three-pole design ensures comprehensive protection in standard motor control panels and pairs with ABB contactors designed for motor protection.