The TDG650E601TSPF from Teledyne e2v HiRel Electronics is a GaN Power Transistor with Gate Threshold Voltage 1.1 to 2.6 V, Drain Source Voltage 650 V, Drain Source Resistance 25 to 65 milli-ohm, Continous Drain Current 60 A, Pulsed Drain Current 120 A. Tags: Die. More details for TDG650E601TSPF can be seen below.