The CDA20N18X3S from EPC Space is a GaN Power Transistor with Gate Threshold Voltage 0.8 to 2.5 V, Drain Source Voltage 200 V, Drain Source Resistance 18 to 25 milli-ohm, Continous Drain Current 18 A, Pulsed Drain Current 72 A. Tags: Die. More details for CDA20N18X3S can be seen below.