A 12V automotive relay is an electrical switch commonly used in automotive and other 12-volt systems to control high-power devices with a low-power control signal. Here’s an overview of how it works and its common applications:
1. Basic Structure: Coil: The relay contains a coil of wire that, when energized with a 12V current, creates a magnetic field. Contacts: The relay has a set of contacts that either close or open when the coil is energized. The contacts are used to control a high-power device (like a motor, lights, etc.) using a low-power control signal. Armature: This is the movable part that is pulled or pushed by the magnetic field to open or close the contacts. 2. Working Principle: When a 12V signal is sent to the coil (usually from a car’s control circuit), it creates a magnetic field. This magnetic field attracts or repels the armature, causing the contacts to either open or close, allowing or interrupting the flow of higher voltage (usually 12V DC) to the controlled device.
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