The CGD65B200S2 from Cambridge GaN Devices is a GaN Power Transistor with Gate Threshold Voltage 2.2 to 4.2 V, Drain Source Voltage 650 V, Drain Source Resistance 200 to 530 milli-ohm, Continous Drain Current 8.5 A, Total Charge 1.4 nC. Tags: Surface Mount. More details for CGD65B200S2 can be seen below.