Relays are electronic components that control electrical current in electronic circuits. Relays, while passing electric current, limit the movement of their electronic cavity and can therefore control the electric current. Relays play an important role in the operation of electronic devices and are available in a variety of shapes and sizes.

Relays usually consist of a circuit with a metallic crusher and a magnetic coil. This circuit creates a magnetic field while passing the electric current and controls the electric current thanks to this field. Relays are used in many different methods to control electric current, and thanks to these methods, relays are used in various electronic devices.

Relays are mainly used in power supplies, signal processing devices and other devices. Relays may be more expensive than other electronic components, but they perform better at higher frequencies.