Relay
makerAn electrically operated switch that uses an electromagnet to mechanically operate a set of contacts.
expanded
Relays facilitate the control of a high-power circuit by a low-power signal without direct electrical contact. They are commonly used in circuits to manage high voltage or current levels where a direct control system would be impractical or unsafe. Relays find applications in various industries, such as automotive, industrial automation, and telecommunications, due to their ability to provide isolation and signal amplification.
examples
A general-purpose relay model such as the Omron G2R-1A measures 28 mm x 13 mm x 25 mm and is rated for 10 A at 250 V AC.
Used in programmable logic controllers (PLCs) for industrial automation to switch large loads by utilizing a low-voltage control signal.
An automotive relay model like the Bosch Automotive Relay with a compact size of 30 mm x 30 mm x 40 mm, capable of handling 40 A at 12 V DC.
Commonly implemented in vehicle starter systems, enabling the ignition switch to activate the starter motor indirectly.