The FBG30N04C from EPC Space is a GaN Power Transistor with Gate Threshold Voltage 0.8 to 2.8 V, Drain Source Voltage 300 V, Drain Source Resistance 210 to 400 milli-ohm, Continous Drain Current 4 A, Pulsed Drain Current 12 A. Tags: Surface Mount. More details for FBG30N04C can be seen below.