An automotive relay is an electromechanical switch that allows a low-power electrical signal to control a higher-power circuit. It functions by using an electromagnet to open or close electrical contacts, providing the necessary control for high-current electrical systems in vehicles. When a small current flows through the relay’s coil, it generates a magnetic field that moves a set of contacts, which in turn opens or closes the circuit.

    Why Are Automotive Relays Important?

    In modern vehicles, the electrical load is distributed across many different components. These include safety systems, lighting, infotainment, heating and cooling systems, and more. Many of these components require substantial power to operate. However, directly controlling them using a standard switch or low-power electronic system could be inefficient or even hazardous. This is where automotive relays come into play.