4-Wire PWM Fan Temperature Speed Controller DC 12–48V
4-Wire PWM Fan Temperature Speed Controller DC 12–48V
PWM Fan Temperature-Controlled Speed Controller – DC 12–48V, 4-Wire
Take full command of your industrial or computer cooling fans with this precision 4-Wire PWM Fan Temperature Speed Controller by Gaqqee. Designed for wide-voltage operation (DC 11–55V), this compact module automatically adjusts fan speed based on real-time temperature readings — keeping your equipment running efficiently and quietly. Compatible with standard 4-wire EBM fans and high-voltage EC fans using 10V PWM control signals.
Made in Mainland China.
Key Features
- Wide Voltage Range: Operates on DC 11–55V, suitable for a broad range of industrial and computer fan applications.
- Dual PWM Frequency: Selectable 20kHz or 2.5kHz (±2%) output frequency for compatibility with various fan types.
- Precise Temperature Control: Measures from -9.9°C to 99.9°C with accuracy better than 1.2°C (within 0–50°C range).
- EC & EBM Fan Compatible: Supports common 4-wire EBM fans and standard high-voltage EC fans via 10V PWM signal.
- Low-Temperature Shutdown: Automatically cuts fan power via PWM disengagement or relay-extended power cut-off when temperatures fall below a set threshold.
- 3-Digit LED Display: Clearly shows fan RPM, current temperature, and operating status at a glance.
- Manual Speed Override: Directly set fan speed between 5–100% with a simple button press for fixed-output control.
- Low Power Consumption: Operating current under 0.1A — energy-efficient and board-friendly.
- Fan Alarm Output: Alarm signal port outputs a low level if the fan malfunctions during a run state.
Technical Specifications
| Supply Voltage | DC 11–55V |
| Operating Current | <0.1A |
| Fan Current Capacity | <5A (board connector; higher loads require direct power wiring) |
| PWM Frequency | 20kHz or 2.5kHz (±2%) |
| PWM Signal Amplitude | 10.5V (no-load) |
| Temperature Range | -9.9°C to 99.9°C |
| Temperature Accuracy | <1.2°C (0–50°C); <2°C outside that range |
| Package Type | TQFP Module |
| Quantity | 1 controller + 1 probe cable |
| Brand | Gaqqee |
| Origin | Mainland China |
Button Controls at a Glance
- '+' / '–' Buttons: Switch display modes during operation; adjust parameter values in setup mode (long press for rapid adjustment).
- 'OK' Button – Short Press (during operation): Enter fixed manual speed output mode (5–100%). Press again to save and exit.
- 'OK' Button – Long Press (during operation): Enter temperature parameter settings. Configure acceleration temperature (L**), full-speed temperature (H**), and shutdown temperature (C**) in sequence.
- 'OK' Button – Power-On Hold: Access function settings to configure PWM frequency (F20 / F2.5) and PWM output direction (forward / reverse).
Temperature Parameter Guide
- Acceleration Temperature (L**): Range 5–94°C. Fan speed increases proportionally above this threshold.
- Full-Speed Temperature (H**): Range 10–99°C. Fan runs at 100% PWM output at or above this value.
- Shutdown Temperature (C**): Range 0–92°C. Fan shuts down below this temperature when set above 0; setting to 0 disables low-temperature shutdown.
Note: Acceleration and full-speed temperatures must differ by at least 5°C. Shutdown and acceleration temperatures must differ by at least 2°C. The controller automatically adjusts related parameters if thresholds are breached.
LED Display Indicators
- X10 RPM: When lit, multiply the displayed value by 10 to read actual fan RPM (e.g., display "256" = 2560 RPM).
- ℃: When lit, the display shows the current temperature from the sensor probe.
- RUN: Illuminates when the fan control signal is active; extinguishes during low-temperature shutdown.
What's in the Box
- 4-Wire PWM Fan Speed Controller Module × 1
- Probe Cable × 1 (style optional)
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Frequently Asked Questions
Q: What fan types are compatible with this PWM fan speed controller?
A: This controller is compatible with standard 4-wire EBM fans and high-voltage EC fans that use a 10V PWM control signal. It supports both 20kHz and 2.5kHz PWM frequencies, making it suitable for a wide range of industrial and computer cooling fans.
Q: What voltage does the PWM fan temperature speed controller require?
A: The controller operates on a supply voltage of DC 11–55V (circuit operating voltage), making it highly versatile for various industrial and computer system setups.
Q: How does the low-temperature fan shutdown feature work?
A: When the shutdown temperature (C**) is set to a value greater than 0, the controller will automatically stop the fan — cutting both the PWM signal and relay output — when the measured temperature drops below that threshold. The fan will restart and resume speed control once the temperature rises above the set acceleration temperature again. Setting shutdown temperature to 0 disables this feature entirely.
Q: Can I manually set the fan speed without relying on temperature control?
A: Yes. A short press of the OK button during normal operation enters the fixed manual speed output mode, allowing you to set fan speed anywhere between 5% and 100% independently of temperature readings. Press OK again to save and return to automatic temperature-based control.
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.