The TP65H300G4JSGB-TR from Transphorm is a GaN Power Transistor with Gate Threshold Voltage 2 to 2.8 V, Drain Source Voltage 650 V, Drain Source Resistance 240 to 492 milli-ohm, Continous Drain Current 9.2 A, Pulsed Drain Current 30 A. Tags: Surface Mount. More details for TP65H300G4JSGB-TR can be seen below.