PWM Fan Speed Controller DC 12V 3A – 4-Wire Digital Display
PWM Fan Speed Controller DC 12V 3A – 4-Wire Digital Display
Take Full Control of Your Cooling System
The PWM Fan Speed Controller is a compact, intelligent module that lets you precisely manage the speed of your 4-wire DC 12V fans. Whether you're building a custom PC, managing a server rack, or optimizing an electronics cooling enclosure, this controller delivers accurate temperature-based speed regulation with a clear digital display — all in a space-saving form factor.
Made in Mainland China.
Key Features
- Smart PWM Control: Accurately adjusts 4-wire PWM fan speeds to maintain optimal airflow while keeping noise and power consumption to a minimum.
- Digital Display: Real-time readout of both temperature and fan speed, so you can monitor performance at a glance without guesswork.
- Low-Temperature Auto Shutoff: Automatically powers down the fan when temperatures drop below a set threshold — saving energy and reducing wear.
- Compact Design: At just 6 × 2.88 × 1.92 cm, this controller fits neatly inside tight spaces such as PC cases, compact enclosures, or DIY cooling builds.
- Wide Compatibility: Works with most 12V / 3A chassis fans and air-cooling setups. Supports reverse timing fans. Note: 2-wire and 3-wire fans are not compatible.
- Easy Setup: Convenient wiring layout and plug-and-play design make installation quick, even for beginners.
- Includes Temperature Probe: The included remote probe lets you sense temperatures right at the source for precise, responsive control.
Specifications
| Input Voltage | DC 12V |
| Max Current | 3A |
| Fan Compatibility | 4-Wire PWM fans only |
| Dimensions | 6 × 2.88 × 1.92 cm (approx. 2.36 × 1.13 in) |
| Display | Digital (temperature & speed) |
| Country of Origin | Mainland China |
What's in the Box
- 1 × PWM Fan Speed Controller Module
- 1 × Temperature Probe
Note: Please allow 1–2 cm variance due to manual measurement.
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Frequently Asked Questions
Q: Is this PWM fan speed controller compatible with 2-wire or 3-wire fans?
A: No — this controller is designed exclusively for 4-wire PWM fans. Using it with 2-wire or 3-wire fans will not work correctly. Please check your fan's connector type before purchasing.
Q: What does the digital display show on this fan controller?
A: The built-in digital display shows both the current temperature (read via the included probe) and the fan speed in real time, making it easy to monitor your cooling system's performance at a glance.
Q: Can this DC 12V fan speed controller automatically turn off the fan?
A: Yes! The controller features a low-temperature auto shutoff function. When the ambient temperature detected by the probe drops below your set threshold, the fan will automatically power down — saving energy and extending fan life.
Q: What is the maximum load this fan controller can handle?
A: This controller supports fans rated up to DC 12V / 3A. It is suitable for most standard PC chassis fans and compact air-cooling setups within that power range.
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.