DC Motor Speed Controller 12-48V Speed Switch 40A Stepless Speed Control Universal PWM Motor Speed Control Forward/Reverse

I. Key Product Specifications

Operating Voltage: DC (12-48V wide voltage range); not compatible with AC power

Rated Current: 20A (Max. 40A); Quiescent Current: 0.005A (Standby Mode)

Power Range: Continuous operation within 20A; maximum power 1200W

Voltage Control Range: PWM output range 0%-100%, allowing the motor to operate from a stop to full speed

PWM Frequency: 25kHz

Forward/Reverse Switch: Forward/Stop/Reverse

Motor Direction: No polarity distinction required when connecting the motor; direction can be changed by adjusting the wire sequence

II. Precautions and Instructions for Use

⚠️ Important Notice: This speed controller is **designed exclusively for brushed DC motors**. It is not compatible with brushless DC motors and cannot be used as a voltage regulator

1. The DC motor speed controller accepts DC input only; do not connect it directly to AC power (such as household 220V AC), as this will cause it to burn out.

2. Do not reverse the polarity of the DC power supply; doing so will damage the speed controller.

3. The motor does not have a specific positive or negative terminal. If the rotation direction does not match the desired direction, you can change the direction by adjusting the wire sequence.

4. Turning the potentiometer knob adjusts the controller’s output duty cycle, thereby changing the motor speed

III. Power Range by Input Voltage

- DC12V ≤ 240W

- DC24V ≤ 480W

- DC36V ≤ 720W

- DC48V ≤ 960W