The GP120R60T4 from GaNPower International is a GaN Power Transistor with Gate Threshold Voltage 1.5 to 4 V, Drain Source Voltage 1100 V, Drain Source Resistance 42 to 60 milli-ohm, Continous Drain Current 30 A, Total Charge 8.25 nC. Tags: Through Hole. More details for GP120R60T4 can be seen below.