The GS-065-004-1-L from GaN Systems is a GaN Power Transistor with Gate Threshold Voltage 1.7 V, Drain Source Voltage 650 V, Drain Source Resistance 450 milli-ohm, Continous Drain Current 4 A, Pulsed Drain Current 7.1 A. Tags: Die. More details for GS-065-004-1-L can be seen below.