Learn how to test a MOSFET using a multimeter with step-by-step guidance and practical voltage readings.
How to Test a MOSFET: A Step-by-Step Guide
Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) are widely used in electronic circuits for switching and amplification. However, faulty MOSFETs can cause circuit failures, making it essential to test them before installation or troubleshooting issues in an existing setup. In this guide, we will discuss different methods to test a MOSFET using simple tools like a digital multimeter. Understanding MOSFET Terminals A MOSFET has three terminals: Gate (G): Controls the conduction state. Drain (D): The main current-carrying terminal. Source (S): The terminal where current exits the MOSFET. MOSFETs come in two main types: N-channel MOSFET: Conducts when a positive voltage is applied to the gate. P-channel MOSFET: Conducts when a negative voltage is applied to the gate. Tools Required for Testing Digital multimeter (DMM) MOSFET datasheet (for reference) Breadboard or test circuit (optional) Testing MOSFET with a Digital Multimeter Follow these steps to test your MOSFET for proper functionality…
About the author
Prasun Barua is a graduate engineer in Electrical and Electronic Engineering with a passion for simplifying complex technical concepts for learners and professionals alike. He has authored numerous highly regarded books covering a wide range of elec…
