Are Relais solid state   This article gives no clarification but I think it should Especially as the disambguation side explicitly declares that a solidstate device does not contain relays Which I suspect to be wrong There exist many devices that are called  solidstate an do in fact contain relais   Another Question arises about the definition moving parts There are devices that contain keys and switches and potentiometers all of them sporting moving or movable parts and the devices are regarded solidstate nevertheless