... 2-6AQJ6060AC quick delivery in 2 daysused for stepper motor Nema 08,1,14,1,23,24,34, ... , so as not to damage the module2.GND:DC power cathode3.A+,A-:Stepping motor one winding 4.B ... rising edge duration >10μS)6.CW +,CW-:Stepping motor direction input, voltage level touched off,high towards, ... 3A, fix the module on big metal shell , or use axle flows fan dispels the heat, to make the module run reliably ...