The solid state relay is a modern, strong way to manage electrical power that works well and reliably. A solid state relay is more durable, switches faster, and runs without making noise than a standard electromechanical relay. epropk and other top providers make high-quality SSRs (solid state relays) that may be used in both homes and businesses. What does a solid state relay do? ... https://epro.pk/product/variable-resistor-solid-state-relay-40a-ssr-40va-relayssr40va-solid-state-relay-ssr-40va/