MOS relays are electronic switching devices that use MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) to control the flow of electrical current. Unlike traditional relays that have moving mechanical parts, MOS relays operate using solid-state components, making them highly reliable and long-lasting. MOS relays are especially popular in circuits that need frequent switching, low power consumption, and minimal electromagnetic interference (EMI). MOS relays are revolutionizing how switching is handled in modern electronics.