The EPC2019 from Efficient Power Conversion is a GaN Power Transistor with Gate Threshold Voltage 0.8 to 2.5 V, Drain Source Voltage 200 V, Drain Source Resistance 36 to 50 milli-ohm, Continous Drain Current 8.5 A, Pulsed Drain Current 42 A. Tags: Die. More details for EPC2019 can be seen below.