The EPC2021 from Efficient Power Conversion is a GaN Power Transistor with Gate Threshold Voltage 0.7 to 2.5 V, Drain Source Voltage 80 V, Drain Source Resistance 1.8 to 2.2 milli-ohm, Continous Drain Current 90 A, Pulsed Drain Current 390 A. Tags: Die. More details for EPC2021 can be seen below.