12V PWM Fan Speed Controller 2/4 Wire NTC Temperature Control
12V PWM Fan Speed Controller 2/4 Wire NTC Temperature Control
12V DC PWM Fan Temperature Speed Controller – 2 & 4 Wire, NTC B 50K 3950
Take full control of your computer chassis or DIY cooling system with this 12V DC PWM Fan Speed Controller. Designed for both 2-wire and 4-wire fans, this compact module automatically adjusts fan speed based on temperature readings via the included NTC thermistor (B 50K 3950) — keeping your system running cool and quiet without manual intervention.
Whether you're building a custom PC, optimising a server cabinet, or working on a DIY electronics project, this controller delivers smooth, automatic speed regulation that reduces unnecessary noise when full cooling power isn't needed.
Made in Mainland China.
Key Features
- PWM Speed Control: Smoothly regulates fan speed using Pulse Width Modulation for efficient, stable operation
- Temperature-Driven Automation: NTC B 50K 3950 thermistor senses ambient or component temperature and adjusts fan speed automatically
- Wide Compatibility: Supports 2-wire and 4-wire DC fans — ideal for chassis, CPU, GPU, and case fans
- Recommended Supply Voltage: 12V DC (working range: 9V–14V)
- Max Output Current: 0.8A
- Operating Temperature: -20°C to +60°C
- DIY Kit Package: Comes ready for hands-on assembly and customisation
- Noise Reduction: Lower fan speeds at lower temperatures mean a quieter, more pleasant environment
- Compact Design: Easy to integrate into existing builds or new projects
Specifications
| Supply Voltage | Recommended 12V (9V–14V working range) |
| Output Current | 0.8A |
| Control Method | PWM (Pulse Width Modulation) |
| Thermistor | NTC B 50K 3950 |
| Fan Compatibility | 2-wire & 4-wire DC fans |
| Operating Temperature | -20°C to +60°C |
| Package | DIY Kit (Qty: 1) |
| Condition | New |
| Origin | Mainland China |
What's in the Box?
- 1 × 12V DC PWM Fan Speed Controller Module (DIY Kit)
- NTC B 50K 3950 Thermistor Sensor
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Frequently Asked Questions
Q: What types of fans are compatible with this 12V PWM fan speed controller?
A: This controller is compatible with both 2-wire and 4-wire DC fans commonly used in computer chassis, CPU coolers, case ventilation, and DIY electronics projects. As long as the fan operates at 12V DC and draws no more than 0.8A, it should work with this module.
Q: How does the NTC B 50K 3950 thermistor work with this controller?
A: The NTC (Negative Temperature Coefficient) thermistor monitors the temperature of the surrounding environment or component. As temperature rises, the controller automatically increases fan speed; as temperature drops, it reduces fan speed — keeping noise low when cooling demand is minimal.
Q: Can I use this controller outside the recommended 12V supply?
A: The module is designed to work within a 9V–14V input range, with 12V DC being the optimal recommended voltage. Operating outside this range may affect performance or damage the module, so it's best to stay within the specified working range.
Q: Is this a complete kit or does it require additional components?
A: This product is supplied as a DIY kit. It includes the controller module and NTC thermistor. You will need to supply your own 12V DC power source and compatible fan(s). Basic electronics assembly knowledge is recommended for installation.