How do Electromechanical Relays Work?

To put it simply, an electromechanical relay is essentially just a switch. However, relays are controlled by electromagnets, whereas switches are manually actuated. They are used in a control circuit when a low power signal is required, or when several circuits need to be controlled. Inside the relay, a small current is used to create a magnetic field within the coil. This magnetic field is used to switch or control a much larger current. Relays come in a variety of sizes and can use different technology, but they operate with the same basic concept that makes them an electromagnetic relay.

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