SOT-227 is currently PSI's biggest standard power package that can cater for single, dual or multi chip die requirement. It comes with different pad configurations: Single Pad (Pad A) type and Dual Pad (Pad D & E) type. This package has an electrical isolation mounting plane connected by an aluminum nitride (AlN) or Alumina substrate with an isolation voltage of up to 3000 volts. It is designed to withstand the high voltage and high speed switching applications that come with most of the power devices. This is normally used in industrial applications such as elevators, escalators, UPS, welding machines, motor controls, switching, variable speed drives, control devices and other industrial products.