ABB TF140DU-142 Thermal Overload Relay

The TF140DU-142 thermal overload relay from ABB provides motor protection for the main circuit in low‑voltage starter assemblies, rated for 142 A of continuous current to guard industrial motors against overheating. Designed for 480/600 V AC power networks, this unit is part of ABB’s TF140DU family and offers a high short‑circuit capability (10 kA) to help maintain system reliability during fault events. It carries the order code 1SAZ431201R1004 and weighs approximately 0.82 kg, making it a compact, panel‑mount protection device suitable for standard motor control schemes. The TF140DU‑142 is associated with Class 10 trip performance, aligning with common industry expectations for predictable motor protection, and is commonly used in ABB protection configurations to complement auxiliary control circuits within the starter assembly.