DC 12V PWM Fan Speed Controller 5V 25KHz 4-Pin with Switch

$4.61 $5.97

Take Full Control of Your Computer Case Fan Speed

This compact DC 12V PWM Fan Speed Controller gives you precise, whisper-quiet control over your computer case or CPU fans. With a full 0–100% PWM signal output range at 5V / 25KHz, you can dial in the perfect balance between cooling performance and near-silent operation — all with a convenient built-in on/off switch.

Key Features

Working Voltage: DC 12V
PWM Signal Mode: 5V, 25KHz
PWM Signal Output Range: 0% – 100% (full-range speed control)
Maximum Fan Current: ≤ 3A (for higher-current fans, connect additional wires directly from the fan's positive and negative poles to the power supply)
Output Interface: 2510-4P standard CPU/chassis fan socket — 2.54mm pin spacing, compatible with most standard 4-pin fan connectors
Single channel design — straightforward wiring and setup
Built-in on/off switch for added convenience
Low power consumption with quiet (mute-friendly) operation
Material: Stainless Steel housing elements for durability

Why You'll Love It

Stop putting up with loud, full-blast fans running at unnecessary speeds. This PWM controller lets you fine-tune airflow in your PC case, server rack, or DIY electronics project. The standard 4-pin 2.54mm connector means plug-and-play compatibility with the vast majority of CPU and chassis fans on the market. The integrated switch adds a layer of practical control right at your fingertips.

Made in Mainland China.

What's in the Box

1 × DC 12V PWM Fan Speed Controller with Switch

Frequently Asked Questions

Q: What type of fans is this PWM fan speed controller compatible with?

A: This controller is compatible with standard 4-pin CPU and computer case (chassis) fans using a 2510-4P connector with 2.54mm pin spacing. It operates at DC 12V with a 5V 25KHz PWM signal, which matches the specification of most mainstream PC fans.

Q: Can this controller handle fans with a current draw higher than 3A?

A: The controller supports fan currents up to 3A directly. For fans that draw more current, you can connect two additional thick wires from the fan's positive and negative terminals directly to the power supply, using the controller purely for the PWM signal. This keeps the high current off the controller board.

Q: Does this controller completely stop the fan at 0% PWM output?

A: The PWM output range is 0%–100%, meaning you can set the signal to its lowest point. Whether a fan fully stops at 0% depends on the fan model itself — some fans have a minimum startup speed. The built-in on/off switch can be used to fully cut power to the fan when needed.

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.