Relays are key control components in vehicle circuit systems, responsible for controlling the switching of large currents while controlling small currents, protecting switches and circuits. Their core functions include automatic circuit switching, overload protection, and signal conversion, ensuring the stable operation of high-power devices such as headlights, starter motors, and air conditioners. Mainstream models, such as 4-pin and 5-pin relays, are waterproof, shock-resistant, and high-temperature resistant, and their contacts are often made of silver alloy for improved conductivity and lifespan.
