12V DC PWM Fan Temperature Speed Controller – 2/3/4 Wire

12V DC PWM Fan Temperature Speed Controller

Take full control of your PC or chassis cooling with this compact 12V DC PWM Fan Temperature Speed Controller. Automatically adjusting fan speed based on real-time temperature readings, this DIY kit keeps your system running quietly and efficiently — no more constantly spinning fans at full blast. Compatible with 2-wire, 3-wire, and 4-wire PWM fans, it's a versatile upgrade for computer builds, server enclosures, and DIY electronics projects.

Key Features

• Automatic Temperature-Based Speed Control: The NTC 50K (B=3950) temperature probe continuously monitors ambient heat and adjusts fan speed accordingly for optimal thermal management.
• Wide Fan Compatibility: Supports 2-wire, 3-wire (PWM, without display), and 4-wire PWM fans — covering most standard PC and chassis fans.
• Compact DIY Kit Form Factor: Measuring just 48mm × 18mm × 9mm, this module fits neatly inside any chassis or enclosure without occupying valuable space.
• Handles Up to 0.8A Fan Current: Safely drives fans drawing up to 0.8A (non-overloaded), suitable for most standard 12V cooling fans.
• Stable Operating Range: Recommended supply voltage of 12V (working range: 9–14V); operates reliably across temperatures from -20°C to +60°C.
• XH-2P Probe Connector: Standard 2.54mm pin-spacing probe interface for easy, reliable NTC probe connection.
• Quieter Operation: By matching fan speed to actual thermal load, the controller reduces unnecessary noise during low-demand periods.

Specifications

What's in the Box

• 1× PWM Fan Temperature Speed Controller Module (DIY Kit)
• 1× NTC 50K Temperature Probe (50cm cable, XH-2P connector)

Great for DIY Builders

Whether you're building a custom PC, retrofitting a server rack, or designing a DIY enclosure, this controller gives you an affordable, reliable way to automate thermal management. Pair it with quality accessories from our store to complete your build — check out our Round Aluminum Wire for DIY Projects or browse our range of DIY Craft & Maker Supplies.

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Frequently Asked Questions

Q: What fan types are compatible with this PWM fan temperature speed controller?

A: This controller supports 2-wire, 3-wire (PWM, without display), and 4-wire PWM fans, making it compatible with the vast majority of standard 12V DC computer and chassis cooling fans. Always ensure your fan does not exceed 0.8A current draw to avoid overloading the module.

Q: How does the temperature-based automatic speed control work?

A: The included NTC 50K (B=3950) temperature probe monitors the surrounding temperature in real time. As heat rises, the controller increases fan speed to boost airflow; as temperatures drop, fan speed is reduced — keeping your system quieter during low-load periods and cooler when working hard.

Q: What is the recommended supply voltage for this fan controller module?

A: The recommended operating voltage is 12V DC, with a functional working range of 9V to 14V. This makes it ideal for use with standard ATX PC power supplies or 12V DC adapters in DIY enclosures and chassis builds.

Q: What is the difference between the PWM 2-3 Wire (without display) and PWM 4-Wire variants?

A: The PWM 2-3 Wire variant is designed for standard 2-wire and 3-wire fans and does not include a display readout. The PWM 4-Wire variant is specifically designed for fans with a dedicated PWM control signal wire (4-pin fans), offering more precise speed regulation. Choose the variant that matches your fan's connector type.

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.