Mini PWM 12V DC Fan Speed Controller – 3A Adjustable Module
Default Title
$7.53
Sale price
$7.53
Regular price
$9.34
Skip to product information
Mini PWM 12V DC Fan Speed Controller – 3A Adjustable Module
$7.53
Sale price
$7.53
Regular price
$9.34
Shipping calculated at checkout.
Mini PWM DC Fan Speed Controller – Precision 4-Wire Fan Control
Take full command of your 12V four-wire PWM fans with this compact, high-quality DC fan speed controller. Built for hobbyists, PC builders, and electronics enthusiasts, this single-board module delivers smooth, adjustable speed control via a simple potentiometer — no complicated wiring required. Made in Mainland China.
Why Choose This PWM Fan Speed Controller?
- Adjustable Speed Range: Full PWM output from 0% to 100%, giving you complete control over fan speed for cooling and noise management.
- Built-In On/Off Switch: Conveniently cut power to the fan without disconnecting any wiring.
- Stable Performance: Metal construction with reliable circuitry ensures consistent, long-lasting operation.
- Simple Wiring: Red and black input leads with a standard 2510-4P CPU/chassis fan output connector (2.54mm pin pitch) — plug in and go.
- Start Speed Trim: A dedicated onboard potentiometer lets you fine-tune the minimum start-up speed (0%–60% range) for your specific fan.
- Reverse Timing Fan Support: Short the onboard (PF) solder point to reverse the PWM direction — compatible with reverse-timing fans after simple modification.
- Ultra-Compact Size: At just 2.5 × 2 cm, this module fits in the tightest of builds and enclosures.
Technical Specifications
| Operating Voltage | DC 12V (works in 8–15V range) |
| Max Fan Current | 3A (limited by switch and connector) |
| Board Idle Draw | <20mA (no fan connected) |
| PWM Signal Mode | 5V / 25KHz |
| PWM Output Range | 0% – 100% |
| Start Position Trim Range | 0% – 60% |
| Input Type | Red & black leads / 2510-3P output (optional) |
| Output Connector | 2510-4P, 2.54mm pin pitch (CPU/chassis fan socket) |
| Material | Metal |
| Dimensions | 2.5 × 2 cm |
| Package Contents | 1 × Speed Control Module |
| Country of Origin | Made in Mainland China |
Important Notes Before You Buy
- ⚠️ This controller is designed exclusively for 4-wire, 12V PWM fans (e.g. CPU fans, chassis fans). It is NOT compatible with 2-wire or 3-wire fans.
- Always match the fan voltage to the power supply voltage.
- Turn off power before making any adjustments to the (PF) solder point to avoid component damage.
- Potentiometer: turn counter-clockwise to minimum/off, clockwise for maximum output.
Related Products You May Like
- 1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino
- 1-Channel SCR Solid State Relay Module DC3-24V 40A Optocoupler
- 0.25mm 1000-Turn Precision Copper Inductor Coil for DIY Circuits
For more guidance on safe electronics handling and DIY circuit best practices, visit the U.S. Consumer Product Safety Commission (CPSC).
Learn more: Motor controller
Frequently Asked Questions
Q: Will this PWM fan speed controller work with my 3-wire or 2-wire fan?
A: No. This module is specifically designed for 4-wire PWM fans operating at 12V. It controls fan speed via the dedicated PWM signal wire found only on 4-wire fans. Standard 2-wire and 3-wire fans do not have this signal wire and cannot be controlled by this module.
Q: What voltage does this DC fan speed controller support?
A: The module operates on DC 12V and is compatible with a supply voltage range of 8–15V. Always ensure your fan's rated voltage matches your power supply to avoid damage.
Q: How do I set the minimum start speed on this controller?
A: There is a small trimmer potentiometer on the board dedicated to start-speed adjustment (range: 0%–60%). Use a small screwdriver to fine-tune it so your fan spins up reliably from a standstill when you first turn the controller on.
Q: My fan speed changes in the opposite direction when I turn the knob — what should I do?
A: Your fan is likely a reverse-timing PWM fan. With the power disconnected, use solder to short the (PF) pad on the board. This reverses the PWM direction, allowing the potentiometer to control a reverse-timing fan in the correct direction.
Details
This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.
Shipping & Returns
We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.
We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.
