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IRF840 is an N-Channel MOSFET available in TO-220 package. It is designed for high voltage applications of upto 500V with high speed switching capabilities. It can be used for both switching and amplification purposes. As a switch it can drive load of upto 8A and load of upto 30A in pulse mode. The device can be used in many high voltage applications such as power supplies, motor controllers, UPS etc. Additionally IRF840 can also be connected and controlled directly with the output of integrated circuits.

The max power dissipation is 125 Watt due to which it can also be used in audio amplification circuits.


Features / Technical Specifications:

  • Package Type: TO-220
  • Transistor Type: N Channel
  • Max Voltage Applied From Drain to Source: 500V
  • Max Gate to Source Voltage Should Be: ±20V
  • Max Continues Drain Current is : 8A
  • Max Pulsed Drain Current is: 32A
  • Max Power Dissipation is: 125W
  • Minimum Voltage Required to Conduct: 2V to 4V
  • Max Storage & Operating temperature Should Be: -55 to +150 Centigrade


  • Applications:

    Battery Charger Circuits

    Solar Power Applications

    Applications That Requires Fast Switching

    AC Motor Drivers / Controllers

    DC Motor Drivers / Controllers

    Uninterruptible Power Supplies



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