How Triac Switch works?

A TRIAC (Triode for Alternating Current) switch is a semiconductor device that can control the flow of AC power. It operates by allowing current to flow in both directions when triggered by a small gate current. Once triggered, the TRIAC remains in the conducting state until the current through it drops below a certain level, known as the holding current. This allows for precise control of AC power, making TRIACs commonly used in applications like light dimmers and motor speed controls.