The EPC2015C from Efficient Power Conversion is a GaN Power Transistor with Gate Threshold Voltage 0.8 to 2.5 V, Drain Source Voltage 40 V, Drain Source Resistance 3.2 to 4 milli-ohm, Continous Drain Current 53 A, Pulsed Drain Current 235 A. Tags: Die. More details for EPC2015C can be seen below.