A relay is an electrically operated switch. It has a set of input terminals for one or more control signals, and a set of operating contact terminals. The switch may have any number of contacts in multiple …

A relay is an electromagnetic switch that opens and closes circuits electromechanically or electronically. A relatively small electric current that can turn on or off a much larger electric current operates a relay.

Mar 8, 2024 · Learn how a relay works and how you can use it to turn on/off high-power devices with tiny signals. Includes practical circuit examples.

May 17, 2024 · Powered by electromagnets, a relay is simply a mechanical switch, and you'll find them all over a typical house or car. Find out what these simple components are doing in all your electrical …

A relay is an electrical switch that can be activated by a low-power signal. Learn more about what is a relay and their many applications here!

Oct 31, 2023 · Relays play a vital role in countless consumer, commercial, and industrial applications and systems. They are often employed in everyday systems without notice. For example, relays are …

Aug 22, 2025 · A relay is an electromechanical or solid-state device that uses a small input signal to switch a larger load current. In simple terms, it works like a remote-controlled switch.

The relay is the device that open or closes the contacts to cause the operation of the other electric control. The main working principle of the relay is the electromagnetic attraction.

Learn the fundamentals of relays, including their operation, technology, applications, safety standards, and terminology for better understanding and use.

Dec 20, 2025 · Relay, in electricity, electromagnetic device for remote or automatic control of current in one (relay) circuit, using the variation in current in another (energizing) circuit.