The TP65H150BG4JSG-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 150 to 307 milli-ohm, Continous Drain Current 16 A, Pulsed Drain Current 55 A. Tags: Surface Mount. More details for TP65H150BG4JSG-TR can be seen below.