Standard Contactor

Product Details

  • Date

     October 4, 2014

  • Category


Standard Contactor 3TF

Order No: 3TF….-…..

3TF Series AC Contactors are latest products of Siemens AG in 1990 ís the series products are suitable for frequency of 50/60Hz, rated insulation voltage up to 690 ~ 1000V, rated operational current up to 9A ~ 400A at rated operational voltage up to 380V under the utilization category AC – 3. 3TF Series AC Contactors are mainly used for making/breaking electric circuits at a long distance and for frequent starting /

stopping and reversing control of AC motors.


Operating Condition


  • The altitude of the site of installation does not exceed 2000 meters above sea levels.
  • The ambient air temperature: -25 ~ +55°C
  • Relative humidity does not exceed 50% at +40ºC and 90% at +25°C
  • Atmospheric conditions: the air does not contain any explosive medium, corrosive gases and conductive dust.
  • Never be shocked and vibrated obviously.
  • Never be wetted by rain and snow.


  • For better safety, conductive part are enclosed.
  • Small sizes, light weight, material of arc chute adopts unsaturated resin, with good arc resistance, never splitting.
  • The arc chute is enclosed , arc-over distance is small, with a compact electric cabinet.
  • Construction of main contacts system is unique, abrasion of the contacts is small, with a long electric endurance.
  • The operation of the magnet has many advantages such as good reliability, little consumption, low noise and high mechanical strength.
  • The contactors have higher operation frequency and control capacity.
  • Auxiliary contact block may be attached to 3TF30 ~ 50 Series AC Contactors.