How Does A 12 Volt Relay Work

So how much voltage does a 12v relay need to work.

How does a 12 volt relay work. What happens inside a relay isn t magic but it is important. The purpose of an automotive relay is to automate this power to switch electrical circuits on and off at particular times. A relay is essentially a switch that is operated electrically rather than mechanically. Relays are switches controlled by electrical power like another switch computer or control module.

Let s start by looking at a datasheet for an ad pr40 1c 12d 12v relay which is an open style power relay. Second relay coil 5v i want the system to start the 12 volt battery automatically when power goes off. However the real benefit behind a relay is more than just automation. Understanding how the relay works will help with diagnosis and modifications to vehicle systems.

They also provide the ability to switch multiple circuits including different voltage types within. Automotive relays and how they work automotive relays of all shapes and sizes can be found in just about every car truck and even boats. Relays in general are used to enable a low amperage circuit to switch on or off a higher amperage circuit like turning on your headlights.