The EPC2037 from Efficient Power Conversion is a GaN Power Transistor with Gate Threshold Voltage 0.8 to 2.5 V, Drain Source Voltage 100 V, Drain Source Resistance 400 to 550 milli-ohm, Continous Drain Current 1.7 A, Pulsed Drain Current 2.4 A. Tags: Die. More details for EPC2037 can be seen below.