Key Specifications
General
Product Type: Thermal overload relay
Model: TA25DU3.1M
Poles: 3
Overload Setting Range: 2.2–3.1 A
Trip Class: 10A
Reset: Manual or automatic selectable
Auxiliary Contacts: 1 NO + 1 NC
Electrical Ratings
Rated Operational Voltage (Main): up to 690 V AC
Rated Insulation Voltage (Ui): 690 V
Rated Frequency: 50/60 Hz
Auxiliary Contact Ratings: Suitable for typical control circuits
Mechanical / Installation
Mounting: Direct attachment to compatible ABB contactors
Terminals: Screw type
Degree of Protection: IP20 (housing), IP10 (main terminals)
Dimensions: ~80 × 44 × 94 mm (H×W×D)
Operating Temperature: –25 °C to +55 °C
Standards & Compliance
IEC/EN 60947‑4‑1
UL and CSA recognized
The ABB TA25DU3.1M is a 3‑pole thermal overload relay designed to protect AC motors and motor circuits from overload and phase failure. It is an electromechanical protective device that heats internal bimetal elements proportionally to motor current and trips when excessive current (overload) is sustained. It is intended for use with compatible contactors to form a complete motor starter assembly.