What is a MOSFET?

A MOSFET is a type of transistor used to switch or control current. The name stands for metal-oxide-semiconductor field-effect transistor.

Where MOSFETs are used

MOSFETs are common in power supplies, motor drivers, LED dimmers, battery circuits, amplifiers, processors, and digital logic. They can switch quickly and can be very efficient when chosen correctly.

MOSFET versus BJT

A BJT is controlled mainly by current, while a MOSFET is controlled mainly by voltage at its gate. Both are transistors, but they behave differently in circuits.

For many modern switching tasks, the MOSFET is the go-to transistor.