The EPC2031 from Efficient Power Conversion is a GaN Power Transistor with Gate Threshold Voltage 0.8 to 2.5 V, Drain Source Voltage 60 V, Drain Source Resistance 2 to 2.6 milli-ohm, Continous Drain Current 48 A, Pulsed Drain Current 450 A. Tags: Die. More details for EPC2031 can be seen below.