drive Safer in Working: Adopting internal working mode without internal mechanical contact non sparking use and low noise higher work safety. Wide Application: Can be used for motor， power rectifiers heating dimming contactless switch stepping motor start etc. Has Fine Feature: The and panel are electrically insulated and also has excellent welding structure and circulation ability. Quick to Install: Comes with a compact size and a light weight as well the rectifier module can be conveniently installed within minutes. Copper Baseplate: Enhanced copper base plate smooth fast heat dissipation prevent overheating protection and smooth operation.