Introduction to irf840, irf840 pinout, irf840 power ratings, irf840 applications Hi Fellas! Hope you’re well today. Happy to see you around. In this post today, I’ll walk you through the Introduction to IRF840. The IRF840 is an n-channel power MOSFET. It is a fast switching and high voltage device that is available with low on-state resistance. As this is an n-channel MOSFET h ...