Home - Blog

IRF840 Datasheet; A complete Introduction to IRF840 is an N-Channel MOSFET

The IRF840 is an N-Channel MOSFET meant for use in high voltage applications of up to 500V. Hence, it comes with high-speed switching capabilities, and most people use it for amplification and switching purposes. This article will highlight more details regarding the IRF840 Datasheet and its uses. Also, it will provide other information about using this one-of-a-kind high voltage MOSFET. 

IRF840 Datasheet: Pin Configuration

Secondly, in electronics, pin configuration is very important, and the wrong pin configuration may render an electronic component useless.

The following table displays the IRF840 pin configuration.

IRF840 Datasheet: Features

The following are the features or the basic parameters of the IRF840:

  • Fall time and rise are 20nS and 23Ns
  • Available on the T0-220 package
  • The DSR (Drain Source Resistance) is 0.85 Ohms
  • Drain to Source Breakdown Voltage: 500V
  • Gate threshold voltage (VGS-th) is 10V (LIMIT = ±20V)
  • And the Continuous Drain Current is 8A
  • As well as N-Channel Power MOSFET

(up-close picture of an APM2510N MOSFET on graphics card)

IRF840 Datasheet: Replacement and Equivalent


Where Can We Use the IRF840?

Firstly, you can use the IRF840 in circuits that require a high voltage load of up to 500V and a load current of up to 8A. Besides, you can use it in circuits that require fast switching. On top of that, it can also find a use for those who manufacture high-power audio amplifiers. 

image of a DPAK Mosfet electronic transistor array isolated on white 3d illustration

(image of a DPAK Mosfet electronic transistor array isolated on white 3d illustration)


  • Battery Charger Circuits
  • Solar Power Applications
  • Uninterruptible Power Supplies
  • Switching high-power devices 
  • DC Motor Controllers / Drivers
  • Control speed of motors 
  • AC Motor Controllers / Drivers
  • Also, applications requiring fast switching
An image of Power Mosfet in a PCB

(An image of Power Mosfet in a PCB


In summary, the IRF840 is one of the best field-effect transistors that finds plenty of use in analog and digital circuits. For more information regarding pricing, technical specs, and lead-time, feel free to contact us at wellpcb. 

Avatar photo
Hommer Zhao
Hi, I am Hommer Zhao, the founder of WellPCB. So far, we have more than 4,000 customers worldwide. If you have any questions, you can feel free to contact me! Your happiness as a customer is my priority!