---
product_id: 9250942
title: "Manual 12V DC Variable Speed Fan Controller with Molex Connector"
brand: "coolerguys"
price: "19 Lei"
currency: RON
in_stock: false
reviews_count: 8
url: https://www.desertcart.ro/products/9250942-manual-12v-dc-variable-speed-fan-controller-with-molex-connector
store_origin: RO
region: Romania
---

# 0-11V manual voltage control Standard 12V Molex 4-pin compatibility 0.5A max load with 3-year warranty Manual 12V DC Variable Speed Fan Controller with Molex Connector

**Brand:** coolerguys
**Price:** 19 Lei
**Availability:** ❌ Out of Stock

## Summary

> 🌬️ Take control of your airflow, silence the noise, and own your space.

## Quick Answers

- **What is this?** Manual 12V DC Variable Speed Fan Controller with Molex Connector by coolerguys
- **How much does it cost?** 19 Lei with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/9250942-manual-12v-dc-variable-speed-fan-controller-with-molex-connector)

## Best For

- coolerguys enthusiasts

## Why This Product

- Trusted coolerguys brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Power:** Fits most 12V DC fans with standard Molex 4-pin connectors—no complex setup needed.
- • **Reliable Longevity:** Backed by a 3-year replacement warranty, ensuring your airflow stays under your command.
- • **Noise Control Ninja:** Tame your PC’s fan roar and create a serene workspace or gaming den effortlessly.
- • **Compact & Discreet Design:** Small footprint with a firm click on/off switch, perfect for hidden or visible mounting.
- • **Precision Fan Speed Mastery:** Smoothly dial your airflow from whisper-quiet to full breeze with manual 0-11V control.

## Overview

This Manual 12V DC Variable Speed Fan Controller offers precise, manual voltage adjustment from 0 to 11V for most 12V DC fans with standard Molex 4-pin connectors. Designed for low-power fans up to 0.5A, it enables smooth speed control and noise reduction with a compact form factor and a reliable 3-year warranty, making it an essential accessory for professionals seeking customizable cooling and quiet environments.

## Description

Manual 12V DC Variable Speed controller with Molex connector Designed to work with DC 12V fans, this Manual 12V DC Variable Speed controller will fit most standard DC fans with standard 12V Molex 4 Pin connectors or use this 4 pin to 3 pin adapter. It allows you to manually adjust the fan speed from off to 100%. - Moving variable speed control - Click on/off - 5.5 inch tail on both sides for 13.25-inch total length. - Switch Dimensions: 2.25 x 1.5 x 1.125 inches LWH - 2 wire 4 Pin Molex socket plug: Male/Female - 12V - 0.5A total throughput capacity Note: This controller is meant for low-power items. Not for Cathode light or lights containing Inverters. High-volume fans will damage the controller.

Review: Works as expected, if you don't need full power - I am using the device to control (6) 80mm fans in an old aluminum case with molex connectors. They start up with the system and make a hurricane of noise. Since I don't have money to buy the case I want, I simply bought this and it allows me to tone down noise and air flow in the case to a respectable, almost inaudible, level. In a short sentence, it does exactly what I bought it for. Here are some of the downsides, caveats or features of the product. Continuous fan speed control. From it's lowest setting where the fans are barely spinning, you can smoothly increase fan speeds easily. Other devices have just a high or low setting, this one lets me change fan speeds until it is exactly as loud as I want, given the task my computer is doing. If you read the other reviews, you'll know the max power is limited by this product. I am not an electrical engineer so I am not sure why an analog switch such as this is either tapping power from the source or increasing resistance so that less power is flowing no matter the setting? Seems like the all the way "max" setting should be equal to or closer to the power without the switch in place... but it does not reach those power levels. On the other hand, if you wanted full power, a device to limit power is the exact opposite of what you need, so I'm guessing other users have a more specific need where it affects their usage. For me, just controlling the noise and air flow of case fans is exactly what this does, so I am happy. Regarding setup, there were no instructions included in mine, and even though I realize most users who buy this probably already know which ends to use, I want just throw out there you just match the end that fits the power connector on your power supply cable first, and plug your devices into the other end. Since my case is a "hand me down" I am missing a 5.25" drive bay cover. However my case has a door that covers all the 5.25 bays. This allows me to put this switch in the open bay and close the door and I can access it without opening the case. I'm not sure how others are using this... but for once, missing a part is actually helping me!
Review: Perfect for 12 V Large Fans not controlled by motherboard. - My computer has a huge 230mm fan on the top that I wanted to turn off while podcasting. This switch allowed me to turn down the RPM and eventually turn it off at will. The only other fan on the motherboard was controlled by software allowing me total control of the noise level. Firm Click to switch on and off. Small footprint.Drilled a hole in the case and mounted the switch inside with only the knob protruding. Perfect.

## Features

- Click on/off
- Allows you to manually adjust voltage from 0 to 11v
- Will fit most DC fans with standard 12V molex 4 Pin connecter, not recommended for lights or other items
- 500ma / 0.5A maximum load capability
- 3 year replacement warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002D3DK1I |
| Customer Reviews | 3.5 3.5 out of 5 stars (31) |
| Date First Available | June 12, 2009 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.4 ounces |
| Manufacturer | Coolerguys |
| Package Dimensions | 4.8 x 2.5 x 1.8 inches |

## Images

![Manual 12V DC Variable Speed Fan Controller with Molex Connector - Image 1](https://m.media-amazon.com/images/I/31c5kxNcVPL.jpg)
![Manual 12V DC Variable Speed Fan Controller with Molex Connector - Image 2](https://m.media-amazon.com/images/I/41CWYVT1uJL.jpg)
![Manual 12V DC Variable Speed Fan Controller with Molex Connector - Image 3](https://m.media-amazon.com/images/I/31+67dPjWfL.jpg)

## Questions & Answers

**Q: will this work in an automotive blower motor application?**
A: It works perfectly with a 6" computer fan. I do not know if ampreage will be an issue with the size of a blower motor. The computer fan draws very little amps.

## Customer Reviews

### ⭐⭐⭐⭐ Works as expected, if you don't need full power
*by M***A on October 12, 2012*

I am using the device to control (6) 80mm fans in an old aluminum case with molex connectors. They start up with the system and make a hurricane of noise. Since I don't have money to buy the case I want, I simply bought this and it allows me to tone down noise and air flow in the case to a respectable, almost inaudible, level. In a short sentence, it does exactly what I bought it for. Here are some of the downsides, caveats or features of the product. Continuous fan speed control. From it's lowest setting where the fans are barely spinning, you can smoothly increase fan speeds easily. Other devices have just a high or low setting, this one lets me change fan speeds until it is exactly as loud as I want, given the task my computer is doing. If you read the other reviews, you'll know the max power is limited by this product. I am not an electrical engineer so I am not sure why an analog switch such as this is either tapping power from the source or increasing resistance so that less power is flowing no matter the setting? Seems like the all the way "max" setting should be equal to or closer to the power without the switch in place... but it does not reach those power levels. On the other hand, if you wanted full power, a device to limit power is the exact opposite of what you need, so I'm guessing other users have a more specific need where it affects their usage. For me, just controlling the noise and air flow of case fans is exactly what this does, so I am happy. Regarding setup, there were no instructions included in mine, and even though I realize most users who buy this probably already know which ends to use, I want just throw out there you just match the end that fits the power connector on your power supply cable first, and plug your devices into the other end. Since my case is a "hand me down" I am missing a 5.25" drive bay cover. However my case has a door that covers all the 5.25 bays. This allows me to put this switch in the open bay and close the door and I can access it without opening the case. I'm not sure how others are using this... but for once, missing a part is actually helping me!

### ⭐⭐⭐⭐⭐ Perfect for 12 V Large Fans not controlled by motherboard.
*by S***Y on March 13, 2012*

My computer has a huge 230mm fan on the top that I wanted to turn off while podcasting. This switch allowed me to turn down the RPM and eventually turn it off at will. The only other fan on the motherboard was controlled by software allowing me total control of the noise level. Firm Click to switch on and off. Small footprint.Drilled a hole in the case and mounted the switch inside with only the knob protruding. Perfect.

### ⭐ Extrordinarily cheap. Didn't work. Don't buy
*by N***G on September 11, 2014*

Bought this to control the speed of a computer fan. Didn't work out of the box. Took it apart and noticed that a wire was ripped right off the board because these units are put together very cheaply. Re-soldered the wire back to the board, but the unit would only function as an on/off switch... The dial did not vary the speed of the fan as it was supposed to... Others have had this issue...Wasted $17 on something that didn't work. My suggestion... Go find something else

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-21*