A method for forwarding a packet by a first Network Virtualization Edge in Network Virtualization Overlays, Layer 3 and an NVE is provided. In embodiments, the structures can include longitudinally spaced insulated gate trenches defining a gate region adjacent the source or drain region and a longitudinally extending potential plate region adjacent the drift region. A timing controller is mounted at the main PCB to process signals input from outside and generate driving signals. The gate voltage clamper prevents an increase in a gate voltage of the IGBT according to an output signal that the GVPA outputs when a fault has occurred.