3 Pin Fan Wiring Diagram

By | August 10, 2023

A 3-pin fan is a type of electric fan that has three wires: a power wire, a ground wire, and a speed control wire. The power wire is typically black, the ground wire is typically green or bare copper, and the speed control wire is typically yellow or orange.

3-pin fans are commonly used in computers, power supplies, and other electronic devices. They are also used in some automotive applications.

The power wire of a 3-pin fan is connected to the positive terminal of the power supply. The ground wire is connected to the negative terminal of the power supply. The speed control wire is connected to a variable resistor or potentiometer.

The variable resistor or potentiometer controls the speed of the fan. When the resistance is low, the fan will run at a high speed. When the resistance is high, the fan will run at a low speed.

3-pin fans are relatively easy to install. The only tools you need are a screwdriver and a pair of pliers.

To install a 3-pin fan, follow these steps:

  1. Turn off the power to the device that you are installing the fan in.
  2. Locate the power supply and identify the positive and negative terminals.
  3. Connect the power wire of the fan to the positive terminal of the power supply.
  4. Connect the ground wire of the fan to the negative terminal of the power supply.
  5. Connect the speed control wire of the fan to the variable resistor or potentiometer.
  6. Turn on the power to the device and test the fan.

3-pin fans are a versatile and reliable way to cool electronic devices. They are easy to install and maintain, and they provide a wide range of speed control options.


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