The CDA20N04X4S from EPC Space is a GaN Power Transistor with Gate Threshold Voltage 0.8 to 2.8 V, Drain Source Voltage 200 V, Drain Source Resistance 65 to 100 milli-ohm, Continous Drain Current 4 A, Pulsed Drain Current 6 A. Tags: Die. More details for CDA20N04X4S can be seen below.