The module defaults to a bare board. If the motor driving the current below 5A does not need forced heat dissipation, it only needs to normal ventilation. If the driving current exceeds 5A, forced heat dissipation must be forced. The heat sink provided by our company can work continuously at 20A current. The onboard LED indicator is used for standby, working, error and other states. Onboard potentiometer (0.5~5V), PWM speed regulation interface (frequency 1~20KHz), duty cycle 10~100%. Onboard FG speed feedback interface, calculate speed RPM=FG frequency Hz * 60/pole pair number. Onboard CWICCW steering control interface, hanging for clockwise CW, shorting GND for counterclockwise CCW steering. Application areas: pumps, medical equipment compressors fans/blowers, electric screwdrivers, electric curtains, automatic doors, hydraulic oil pumps, air pumps, refrigerator DC brushless compressors, lawn mowers, sprayers, underwater thrusters, etc. Forward and reverse switching, stop brake, potentiometer (PWM) speed regulation, LED motor status indication, Motor protection: MOS power-on self-test, MOS over-temperature protection, stall protection, over-current protection, over-undervoltage protection. module is 78x57mm long and wide, the plate thickness is 1.6mm, the working voltage is 6-80V, and it supports anti-reverse connection protection, and the module not be damaged by reverse connection of the power cord. SNR8503M is a 32-bit core MCU, which is very convenient for development and simulation debugging. In order to facilitate users to quickly realize the driving of sensorless BLDC motors, our company has completed the underlying software core algorithm. Users only need to carry out secondary development based on this software to quickly complete product development., Weight: 0.14440278161 Pounds, Manufacturer: ximie