What is MOSFET, Definitions, Advantage & Disadvantage

Authored By: Ankita Prajapati

A MOSFET (Metal Oxide Semiconductor Field-Effect Transistor) is a type of transistor used in many electronic devices. It is a key component in integrated circuits, a semiconductor device that can be used to control large amounts of electricity or data.

The MOSFET is a three-terminal device that uses two metal electrodes, the source and the drain, and one semiconductor electrode, the gate. It is the most widely used type of transistor, thanks to its low cost, small size and low power consumption.

The MOSFET works by controlling the flow of electrons between the source and drain with the gate.

When a voltage is applied to the gate, it attracts electrons from the source, allowing current to flow from the source to the drain.

The MOSFET is said to be in a “ON” state. When the voltage is removed from the gate, the electrons are repelled, and the current ceases to flow. The MOSFET is then said to be in a “OFF” state.

Learn the concepts of MOSFET with YourEngineer


The MOSFET has a number of advantages over other types of transistors.

It has a much higher input impedance than bipolar transistors, which means it can be used to control large amounts of current with a low voltage.

It also has a low “on” resistance, which means it can be used to switch high currents with a low voltage.

MOSFETs also have a low “off” resistance, which means they consume very little power when not in use.


Despite its advantages, the MOSFET has a few disadvantages. It is susceptible to damage from electrostatic discharge, and it is also sensitive to temperature and humidity.

Additionally, MOSFETs have a limited number of “on” states, meaning they can only be used for certain applications.

Test your ANSYS skills with YourEngineer


The MOSFET is an invaluable tool in the world of electronics. Its low cost, small size and low power consumption make it an ideal choice for many applications.

Despite its advantages, the MOSFET also has a few disadvantages, such as susceptibility to damage from electrostatic discharge and sensitivity to temperature and humidity. However, these issues can be addressed with proper design and testing.

What is YourEngineer?

YourEngineer is the first Engineering Community Worldwide that focuses on spreading Awareness, providing Collaboration and building a focused Career Approach for Engineering Students.

Deep dive into Engineering, Join millions like you

campus cover

Apply for Upcoming Programs:

Career Building Program

21-Day Career Building and Advancement BootCamp

Join this 21 Day Bootcamp starting from 01st Feb 2023 and transform yourself.

Skill Development Program

Full Stack Development Training Program (Basic to Advanced)

Become a Full Stack Developer today with 100% Placement Guarantee.

  • Create an Account and Earn 1000 Coins
  • Pass a Quiz and Earn 20 Coins
  • Earn 10 Coins for Daily Visit 
  • Earn 50 Coins for invite someone to join a group
  • Earn 100 Coins for finishing a course