ABB TF140DU-110 Thermal Overload Relay 80-110A

ABB TF140DU-110 Thermal Overload Relay is a three‑pole motor‑protection device rated for 690 V AC with 50/60 Hz operation, designed for main‑circuit protection in industrial drives. It provides an adjustable setting range of 80–110 A and a trip class of 10, suitable for motors up to 110 A. The unit includes a removable auxiliary contact arrangement of 1 normally open and 1 normally closed (1 NO/1 NC) and uses screw terminals for connection, making it compatible with standard ABB control gear. Per pole, the relay presents a resistance of 0.378 mΩ and power loss between 2.4 W and 4.6 W depending on the setting, with a weight of about 0.82 kg and dimensions near 3.31 in (W) × 4.96 in (D) × 5.51 in (H). It supports Type 2 short‑circuit protection device coordination for fuse configurations up to 224 A (gG) and is suitable for installation in environments offering an IP10/IP20 enclosure rating and operating temperatures from −25 °C to +55 °C with screw‑terminal terminals. The model is cataloged under ABB order code 1SAZ431201R1002 and belongs to the TF140DU family, commonly used to protect motors in applications such as pumps, fans, conveyors, and other industrial machinery by interrupting the circuit when an overload condition is detected.