Relays are important components in electrical circuits as they allow for the control of high current devices with low current signals. A 4 pin relay is a type of relay which has four pins – two for the coil and two for the switch. Understanding how to wire a 4 pin relay can be useful in various applications, from automotive to industrial.
When wiring a 4 pin relay, it is important to identify the pins correctly. The pins are typically labeled as 85, 86, 87, and 30. Pins 85 and 86 are for the coil, which creates the magnetic field to activate the switch. Pins 87 and 30 are for the switch, which controls the high current device.
Wiring Diagram For 4 Pin Relay (mungfali.com)
To wire a 4 pin relay, connect the power source to pin 86 and ground to pin 85. Then, connect pin 30 to the power input of the high current device and pin 87 to the device’s power output. This configuration allows the low current signal to control the high current device through the relay.
It is important to follow the wiring diagram for the specific 4 pin relay you are using, as different relays may have slightly different pin configurations. Additionally, make sure to use the appropriate gauge wire for the current being controlled by the relay to prevent overheating and potential damage.
In automotive applications, 4 pin relays are commonly used for controlling lights, horns, and other accessories. By understanding how to wire a 4 pin relay, you can easily add additional functionality to your vehicle without overloading the existing electrical system.
Overall, knowing how to wire a 4 pin relay can be a valuable skill for anyone working with electrical circuits. Whether in automotive, industrial, or home applications, relays play a crucial role in controlling high current devices safely and efficiently.