A 12V relay, often referred to as a relay 12V, is an essential component in modern electrical and electronic systems. It functions as an electrically operated switch, enabling a low-power circuit to control a high-power circuit safely and efficiently. The versatility and reliability of relay 12V devices make them indispensable in automotive, industrial, and home automation applications.

    At its core, a relay 12V consists of a coil, an armature, and a set of contacts. When a 12-volt voltage is applied to the coil, it generates a magnetic field. This magnetic field moves the armature, causing the contacts to either open or close. The switching action allows a small control signal to manage a much larger electrical load without direct electrical connection between the two circuits. This isolation is crucial for protecting sensitive electronics from high currents and voltage spikes.