This 4-channel solid-state relay is suitable for switching alternating voltage. It has galvanic isolation through integrated optocouplers and switching of the load is done with transistors, which means it has a much longer service life than mechanical relays. https://elecena.pl/product/28015674/joy-it-4-channel-solid-state-relay-board 2025-03-12 https://elecena.pl/product/28015674/joy-it-4-channel-solid-state-relay-board 2025-09-17