At its core, a relay is an electromechanical device designed to control the flow of electricity in a circuit. It consists of a coil that, when energized, creates a magnetic field that moves a set of contacts. These contacts can either open or close, thus controlling the electrical connection. Silver alloy contact relays are distinguished by the material used for their contacts. The contacts in these relays are typically made from a silver alloy, combining silver with metals like nickel, copper, or palladium. This alloying process enhances the material properties of the contacts, making them more robust and durable than pure silver contacts.