12 Volt Relay Wiring Diagrams

By | July 30, 2022



For those looking to get their electrical projects up and running, understanding a 12-volt relay wiring diagram is essential. Relay wiring diagrams provide a visual representation of the electrical connections required to activate a particular device or system.

A relay is an electrically operated switch that can be used for both controlling and protecting electrical circuits. A typical 12-volt relay consists of five components: a coil, normally open contacts, normally closed contacts, a diode, and an armature. The 12-volt wiring diagram will show how the components are connected together, allowing you to determine which connections are necessary to activate the relay.

The coil section of the wiring diagram will show which wire needs to be connected to the corresponding terminal of the relay. The current must then flow through the coil, causing the armature to move and activating the contacts. Both Normally Open and Normally Closed contacts are shown in the diagram and these two must be interacted for any relay action to occur. The necessary current must first flow through the Normally Open contact in order to be accessible at the Normally Closed contact, creating a complete circuit.

The diode of the 12-volt relay is used to protect the device from becoming damaged by preventing the reverse flow of the current. This is the case when the connection from the coil to the contacts is opened or broken, as the diode will cause the electricity to flow in the correct direction.

It’s important to note that proper installation of the relay and its wiring is essential in order to ensure proper operation. Repeated connections and disconnections may also cause the contacts to become worn over time, making it necessary to replace the device. Additionally, you should use the same gauge and type of wire throughout your wiring project in order to avoid any potential issues.

Understanding a 12-volt relay wiring diagram can help simplify your electrical project and get it up and running quickly. Knowing the different components and how they interact will enable you to get the most out of your device, while avoiding any potential damage to both the relay and the rest of your electrical system.


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