3.10 - 4.20 Amp, IEC, Overload Relay3. 10 4. 20 Amp, IEC, Overload Relay, Type: Thermal Bi Metallic, Trip Class 10. Selectable Manual or Automatic Reset. For use with AF Series, AF9 AF38 Frame Contactors. The TF42 4. 2 thermal overload relay is an economic electromechanical protection device for the main circuit. It offers reliable and fast protection for motors in the event of overload or phase failure. The device has trip class 10. Further features are the temperature compensation,
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