DC12V 4‑Wire PWM Fan Speed Control Board Manual Potentiometer Adjustment Cooling Fan Speed Regulator Module For PC Case Chassis Fan

4‑Wire PWM Fan Speed Control Board

📌 Product Overview This is a manual PWM speed regulation module specially designed for DC 12V 4‑pin computer fans. It adopts a rotary potentiometer with switch function, which can continuously adjust the PWM duty cycle from 0% to 100% by rotating the knob, realizing stepless fan speed control. The standard 2510‑4P fan connector is perfectly compatible with mainstream 4‑wire PWM cooling fans for computers. Compact PCB design, stable signal output, simple wiring and easy installation, ideal for PC case cooling, industrial equipment heat dissipation and DIY silent cooling modification. ✨ Core Features

1. Independent knob with power‑on/off switch, one‑hand operation for speed adjustment and power control.
2. Standard 5V 25KHz PWM signal, fully compliant with the control protocol of 4‑wire computer fans.
3. 0‑100% stepless speed regulation, flexible to adjust wind speed and noise according to actual heat dissipation demand.
4. Built‑in current‑limiting protection circuit, the maximum control current reaches 3A.
5. Miniature PCB size with mounting hole, convenient for fixed installation inside the case or equipment.
6. Simple wiring terminals, plug‑and‑play without complex programming, suitable for non‑technical users.

📋 Product Parameters

Item	Specification
Working Voltage	DC 12V
Max Fan Control Current	≤3A
PWM Signal Parameter	5V, 25KHz
Speed Adjustment Range	0%‑100% duty cycle
Fan Interface	2510‑4P, 2.54mm pin pitch
Main Board Dimension	29 X 23 X 15mm
Knob Extension Length	20mm
Mounting Hole Diameter	7mm
Net Weight	12g

📐 Dimension Info ‑ Main board size: 29 X 23 X 15mm ⚠ Important Usage Notice

1. This controller is only applicable to DC12V four‑wire PWM fans; it cannot drive ordinary 2‑wire fans directly.
2. When the fan operating current exceeds 3A, use extra thick wires to connect the fan power terminals separately to the power supply.
3. Confirm the positive and negative polarity of the power supply before power‑on to avoid burning the circuit board.
4. Keep the module away from water, dust and high‑temperature areas for long‑term stable operation.

🛠 Application Scenarios PC chassis fan speed adjustment, industrial equipment cooling control, cabinet heat dissipation modification, DIY silent cooling system, 4‑pin PWM fan manual speed regulation.