How Does A 12 Volt Relay Work

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.

How does a 12 volt relay work.

What happens inside a relay isn t magic but it is important. Understanding how the relay works will help with diagnosis and modifications to vehicle systems. Second relay coil 5v i want the system to start the 12 volt battery automatically when power goes off. 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. A datasheet is a document with detailed specifications of a component. They also provide the ability to switch multiple circuits including different voltage types within.

Although there are various relay designs the ones most commonly found in low voltage auto and marine applications are electro mechanical relays that work by activating an electromagnet to pull a set of contacts to make or break a circuit. So how much voltage does a 12v relay need to work. What is a relay.