4-Channel DC 12V PWM Fan Speed Controller – Knob Adjust

4-Channel DC 12V 3A PWM Fan Speed Controller Module

Take full control of your PC case or server airflow with this 4-Channel DC 12V PWM Fan Speed Controller. Featuring a simple manual knob, it lets you independently fine-tune the speed of up to four four-wire fans simultaneously — keeping your system cool and your workspace quiet. Made in Mainland China.

Key Features

• Controls 4 Fans at Once: Simultaneously manages four DC 12V four-wire PWM fans, ideal for multi-fan PC chassis and server builds.
• 3A Total Output: Delivers a stable combined current of up to 3A across all four fan channels for reliable, uninterrupted operation.
• Manual Knob Adjustment: Simple potentiometer knob for precise, hands-on airflow control — fully off (anticlockwise) to maximum output (clockwise).
• Quieter Operation: Lower fan speeds mean reduced fan noise, creating a calmer and more comfortable working environment.
• Integrated On/Off Switch: Built-in switch for quick and easy activation or deactivation of all connected fans.
• Reverse-Sequence Fan Compatible: Solder-bridge the (PF) setting point to enable forward regulation for reverse-sequence fans.
• Standard Connectors: Uses 2510-4P staggered pinout, 2.54mm pin pitch — compatible with standard CPU and chassis fan connectors.

Technical Specifications

How to Use

1. Ensure correct polarity before connecting power. Confirm your power supply voltage matches the fan requirements.
2. Connect power and plug your fans into the four output connectors.
3. Turn the knob clockwise to increase fan speed, anticlockwise to decrease or power off.
4. Use the small onboard adjustable resistor to set the initial startup speed.
5. If your fan speed changes in the opposite direction to the adjustment, solder-bridge the (PF) point — always disconnect power first.

Notes

• Please allow 2–3% dimensional variation due to manual measurement.
• Actual product colour may vary slightly from images due to monitor display differences.

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Frequently Asked Questions

Q: How many fans can this PWM fan speed controller support?

A: This 4-channel PWM fan speed controller can manage up to four DC 12V four-wire fans simultaneously, making it well-suited for multi-fan PC cases and server cooling setups.

Q: What connector type does this fan controller use?

A: The controller uses a standard 2510-4P staggered pinout with a 2.54mm pin pitch, which is compatible with most standard CPU and PC chassis fan connectors.

Q: What should I do if my fan speed changes in the wrong direction when I turn the knob?

A: This indicates a reverse-sequence fan. To correct it, solder-bridge the (PF) setting point on the board. Always disconnect power before performing this operation to avoid damaging the module or fan.

Q: Can I set the initial startup speed of the fans?

A: Yes. There is a small adjustable resistor on the board specifically for setting the initial rotational speed of the fans upon power-up. You can fine-tune this to your preferred startup speed.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.