The SGF43E70-28 from Solid State Devices is a GaN Power Transistor with Gate Threshold Voltage 3.3 to 48 V, Drain Source Voltage 700 V, Drain Source Resistance 39 to 76 milli-ohm, Continous Drain Current 43 A, Pulsed Drain Current 240 A. Tags: Surface Mount. More details for SGF43E70-28 can be seen below.