40A PWM DC Brushed Motor Speed Controller 9–60V Potentiometer
40A PWM DC Brushed Motor Speed Controller 9–60V Potentiometer
40A High Power PWM DC Brushed Motor Speed Controller — 9–60V | 15kHz | 0–100% Variable Speed
Take precise command of your DC brushed motor projects with this robust 40A PWM Motor Speed Controller. Designed for a wide input range of DC 9V to 60V and a 15kHz PWM switching frequency, this compact driver module delivers smooth, stepless speed regulation from 0% to 100% — all through an intuitive onboard potentiometer with built-in switch. Whether you're building an electric vehicle, industrial conveyor, DIY robotics project, or any variable-speed application, this controller handles the job with ease.
Made in Mainland China.
Key Features
- High Power Capacity: Handles up to 40A continuous output current for demanding motor loads.
- Wide Voltage Range: Compatible with DC 9V–60V systems, making it versatile for 12V, 24V, 36V, and 48V applications.
- 15kHz PWM Frequency: High-frequency switching ensures quiet, efficient motor operation with minimal electrical noise.
- 0–100% Speed Range: Full-range current control via a smooth-turn potentiometer — includes integrated on/off switch for convenience.
- Fence-Type Terminal Block: Secure, easy-to-connect screw terminals for reliable wiring in any workshop or field setup.
- Compact Footprint: At just 83mm × 56mm × 26mm (excluding knob), it fits neatly into enclosures and project builds.
- Linear Output Under Load: Delivers proportional voltage output so your motor responds predictably to every adjustment.
Technical Specifications
| Input Voltage | DC 9V – 60V |
| Output Voltage | Linear under load |
| Output Current | 0 – 40A |
| PWM Frequency | 15kHz |
| Speed Control Type | Current Control |
| Speed Control Range | 0% – 100% |
| Speed Control Method | Potentiometer (with switch) |
| Connection Type | Fence-Type Terminal Block |
| Module Dimensions | 83mm × 56mm × 26mm (excluding knob) |
What's in the Box?
- 1× PWM DC Brushed Motor Speed Controller Module
Important Notes
- Due to differences in lighting and screen calibration, the actual product color may vary slightly from images.
- Please allow a tolerance of 1mm–1cm due to manual measurement.
- This controller is designed for DC brushed motors only. It is not suitable for brushless, AC, or stepper motors.
- Ensure your power supply is rated for the load before connecting. Always use properly rated wiring for high-current applications.
For guidance on electrical safety when working with motor control circuits, refer to the OSHA Electrical Safety guidelines.
Frequently Asked Questions
Q: What types of motors is this PWM speed controller compatible with?
A: This controller is designed specifically for DC brushed motors. It is not compatible with brushless motors, AC motors, or stepper motors. Ensure your motor operates within the DC 9V–60V input voltage range and does not exceed 40A draw.
Q: Can I use this motor speed controller with a 12V or 24V battery system?
A: Yes. The wide input voltage range of DC 9V to 60V makes this controller compatible with 12V, 24V, 36V, and 48V battery or power supply systems — ideal for electric vehicles, robotics, and DIY automation projects.
Q: How does the potentiometer control work?
A: The onboard rotary potentiometer adjusts motor speed smoothly from 0% (fully stopped) to 100% (full speed) using current-based PWM control at 15kHz. The integrated switch on the potentiometer also allows you to power the motor on or off without disconnecting any wiring.
Q: Is a heat sink or cooling required for continuous high-current operation?
A: At high currents (near the 40A maximum), it is strongly recommended to mount the controller on a heat sink or provide adequate airflow to prevent thermal buildup and ensure long-term reliable performance.