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TA450DU310 220-310A

The ABB TA450DU310 is a 3‑pole thermal overload relay designed to protect AC motors from overload and phase failure. It is used with compatible contactors to form motor starter assemblies. The relay features adjustable current settings, manual or automatic reset, test and stop functions, and auxiliary signaling contacts for control and indication.

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Key Specifications General Product: Thermal overload relay Model: TA450DU310 Poles: 3 Overload Setting Range: 220–310 A Protection & Function Trip Class: Class 10 Reset: Manual or automatic Functions: Trip indication, test, stop Phase Unbalance/Single-Phase Protection: Built-in Auxiliary Contacts: 1 NO + 1 NC Electrical Ratings Rated Operational Current: up to 310 A (AC‑3) Rated Operational Voltage: up to 1000 V AC Rated Insulation Voltage (Ui): 690 V Rated Impulse Withstand Voltage (Uimp): 6 kV Auxiliary Circuit Ratings: up to 500 V AC / 440 V DC Mechanical / Installation Mounting: Close-coupled with ABB contactors (e.g., AF210, AF260, AF300) Front-accessible adjustment and reset Manual test button and trip indication Ambient-compensated overload protection Environmental Operating Temperature: –25 °C to +55 °C Pollution Degree: 3 Degree of Protection: IP20 Standards & Compliance IEC/EN 60947‑4‑1 UL, CSA, CE, RoHS