What is an electromagnetic relay?

An electromagnetic relay is an electronic control device consisting of a control system (also known as the input circuit) and a controlled system (also known as the output circuit). It is commonly used in automatic control circuits and functions as an 'automatic switch' that controls higher currents and voltages with lower currents and voltages. Therefore, it plays a role in automatic regulation, safety protection, and circuit conversion in circuits. Electromagnetic relays are widely used in aviation, aerospace, marine, home appliances, and other fields, mainly performing functions such as signal transmission, control execution, and system power distribution. They are one of the key electronic components in various systems.