This is a simple unipolar stepper board that can control stepper motors rated to 30VDC. The FET drivers are rated at 50A, but in practicality this board should not be used with motors anywhere near that current for several reasons. The power supply voltage, heat sinks and cooling used for the FET’s of your own application play an extremely important part in making that determination. The FET package is designed for 50 Watts of dissipative power. If you’re not wise in electronics, the board should be built in stages and tested during each stage to eliminate problems
