DC12V PWM Fan Temperature Speed Controller Module Automatic Thermostat 3‑Channel Fan Control Board Max 9A With NTC Temperature Probe

PWM Fan Automatic Temperature Control Speed Controller Module

📌 Product Overview This is a DC12V multi‑channel PWM fan temperature control speed regulation module. It adopts temperature probe real‑time temperature acquisition to automatically adjust the fan speed. Users can switch different temperature control thresholds via the DIP switch, and independently set the minimum PWM output ratio of the fan. The board supports fan stall audible and visual alarm function, which can monitor the working status of cooling fans in real time. With large‑current load capacity, each channel supports up to 5A current and the total bus current reaches 9A, suitable for chassis, cabinet, industrial equipment and other multi‑fan heat dissipation control scenes. ✨ Core Features

• Working voltage: DC12V
• 3‑channel independent fan PWM speed regulation control
• Adjustable starting temperature and full‑speed temperature via DIP switch
• TFL switch to set FAN1 minimum PWM: 20% or 40%
• FAN2 / FAN3 PWM adjustable range: 10%‑100%
• Fan stop fault alarm function, buzzer alarm when fan stalls
• Single channel maximum load 5A, total bus current up to 9A
• Equipped with potentiometer for fine‑tuning parameters
• Reserved buzzer expansion interface for alarm reminder

📋 Product Parameters

Item	Specification
Board Dimension	50mm × 43mm × 13mm
Mounting Hole Size	44mm × 37mm, Hole Diameter 3mm
Operating Voltage	DC12V
Single Channel Max Current	5A
Total Bus Max Current	9A
FAN1 PWM Range	20%‑100% / 40%‑100%
FAN2 & FAN3 PWM Range	10%‑100%
NTC Temperature Probe	50K B=3950
Control Error	3%‑5% (Depends on temperature probe)
Alarm Trigger Speed	700‑800rpm

📐 Dimension Info PCB Size: 50mm × 43mm × 13mm Mounting hole spacing: 44mm × 37mm, mounting aperture 3mm ⚠ Important Usage Notice

1. The actual speed control effect is affected by the fan model and parameters.
2. The fan stall alarm needs to be matched with a buzzer module.
3. Do not exceed the rated 9A total current to avoid burning the circuit board.
4. The temperature probe must be closely attached to the measured heating part to ensure accurate temperature measurement.

🛠 Application Scenarios Server chassis heat dissipation, industrial cabinet cooling, power equipment temperature control, 3D printer heat management, DIY multi‑fan intelligent speed regulation, instrument cooling system