If you are looking to understand how to wire a 12 volt DPDT relay, you have come to the right place. In this article, we will provide you with a detailed guide on how to wire a DPDT relay and give you some FAQ’s at the end. So, let’s get started!
What is a DPDT Relay?
A double-pole double-throw (DPDT) relay is a type of relay that has two sets of switches that can be activated by one control signal. This type of relay is commonly used in automotive, marine and industrial applications. The DPDT relay has six terminals and comes with a wiring diagram that explains how to wire the relay for different applications.
What are the benefits of using a DPDT Relay?
There are a few benefits of using a DPDT relay:
- DPDT relays are more reliable than other types of relays because they have two sets of contacts that can be used for different applications.
- DPDT relays are easy to wire and configure for different applications.
- DPDT relays are suitable for high current applications and can handle up to 20 amps of current.
How to Wire a 12 Volt DPDT Relay?
Before you start wiring the DPDT relay, you need to understand the relay’s terminals and how they work. The DPDT relay has six terminals: two for the coil, two for the normally closed contacts, and two for the normally open contacts. Here is the wiring diagram for a DPDT relay:
| Terminal | Description |
|---|---|
| Terminal 1 | Coil 1 |
| Terminal 2 | Coil 2 |
| Terminal 3 | Normally Open Contact 1 |
| Terminal 4 | Normally Closed Contact 1 |
| Terminal 5 | Normally Closed Contact 2 |
| Terminal 6 | Normally Open Contact 2 |
Now that you understand the terminal layout, here are the steps to wire a 12 volt DPDT relay:
Step 1:
Connect the positive (+) terminal of the power source to terminal 1 of the relay coil. Then, connect the negative (-) terminal of the power source to terminal 2 of the relay coil.
Step 2:
Connect the device that you want to control to the normally open contacts (terminals 3 and 6). When the relay coil is energized, the contacts will close and allow current to flow through the device.
Step 3:
If you want the device to turn off when the relay coil is energized, connect the device to the normally closed contacts (terminals 4 and 5). When the relay coil is energized, the contacts will open and stop the current flow through the device.
FAQ’s
1. What is the maximum voltage that a DPDT relay can handle?
DPDT relays can handle up to 250 volts of AC or DC voltage.
2. Can I use a DPDT relay to control multiple devices?
Yes, you can use a DPDT relay to control multiple devices, but you need to make sure that the total current draw of the devices does not exceed the relay’s rating.
3. Can I use a DPDT relay for high current applications?
Yes, DPDT relays are suitable for high current applications and can handle up to 20 amps of current.
4. How do I know which contacts are normally open and normally closed?
You can refer to the wiring diagram that comes with the DPDT relay or use a multimeter to test the continuity of the contacts.
5. Can I wire a DPDT relay without a wiring diagram?
No, it is not recommended to wire a DPDT relay without a wiring diagram. The wiring diagram specifies how to connect the relay’s terminals and helps prevent wiring mistakes that can damage the relay or the device that it is controlling.
Now that you understand how to wire a 12 volt DPDT relay, you can use it to control a variety of devices in your automotive, marine or industrial applications. Always make sure to follow safety guidelines when working with electrical components and consult a professional if you are unsure about any aspect of the wiring process.
