PWM DC Motor Speed Controller Module 2A/3A/5A/10A Adjustable Potentiometer DC Motor Stepless Speed Regulation Control Board For DIY Project

PWM DC Motor Speed Controller Series (4.5V-35V / 2A / 3A / 6-28V) 📌 Product Overview This is a series of PWM DC motor speed controller modules available in multiple specifications: a 5A high‑power version (red PCB, 4.5V‑35V), a 2A version with switch function (green PCB, 2.2V‑12V, with self‑resetting fuse), a 3A stepless speed regulation version, and a 6V‑28V version supporting speed control, dimming and temperature control. All versions regulate motor speed by adjusting the PWM duty cycle through a built‑in potentiometer knob, and support bidirectional wiring so the motor rotation direction can be easily changed by swapping the wires. They are widely used for small DC motor speed control, LED dimming, fan regulation, model cars, robotics and DIY electronic projects. ✨ Core Features

1. PWM stepless speed regulation: turn the potentiometer knob to adjust duty cycle and control motor speed
2. Multiple spec options: 5A / 2A / 3A current ratings for different load requirements
3. Wide voltage support: versions covering 2.2V‑12V, 4.5V‑35V and 6V‑28V input ranges
4. Motor polarity‑free connection: reverse wires to change rotation direction
5. Built‑in switch function (2A & 6‑28V versions) with power indicator
6. 2A version equipped with self‑resetting fuse for overcurrent protection
7. High‑frequency PWM (20kHz) for quiet and smooth operation
8. Compact PCB design with standard potentiometer for panel mounting
9. Stable performance with long service life, suitable for continuous operation

📋 Product Specifications

Item	Specification
Model Series	PWM DC Motor Speed Controller
Version A (Red PCB)	Input DC 4.5V‑35V, Output 0‑5A, Max 90W, Quiescent 7uA
Version B (Green PCB, with Switch)	Input DC 2.2V‑12V, Output 1.8‑12V adjustable, <2A
Version C (3A Stepless)	DC Stepless speed control, 3A max
Version D (6-28V)	Input DC 6V‑28V, within 3A, speed control 0‑100%
PWM Duty Cycle	1%‑100%
PWM Frequency	20kHz
Operating Temperature	Version B: -10℃ ~ +70℃
Service Life	>100,000 times or 100,000 hours continuous

📐 Dimension Info ‑ Version A (5A): 30mm long × 26mm wide (excluding handle) × 14mm high, weight 12.4g ‑ Version B (2A): 45mm long, weight 12.4g, potentiometer hole approx 8mm ‑ Version C (3A): 32mm × 32mm board, 55mm total length with knob, weight 13.2g ⚠ Important Notes

1. Input power must be DC, never connect to household 220V AC or the module will be damaged.
2. Do not reverse the positive and negative terminals of the DC power supply.
3. Version B max current limit is 2A; continuous current over 0.5A motors (like 775 motors and kids’ ride‑on cars) are not supported.
4. It is not recommended to use a power supply over 12V (such as a 12V lead‑acid battery) for the 2A version.
5. The motor does not need a specific polarity; swap the two wires to reverse the rotation direction.

🛠 Application Scenarios ‑ Small DC motor speed control ‑ LED dimming and lighting regulation ‑ Fan speed adjustment and temperature control ‑ Model cars, robots and DIY electronic projects ‑ Miniature pumps and small appliance control