The G9N40F from Goford Semiconductor is a MOSFET with Continous Drain Current 9 A, Drain Source Resistance 470 to 600 milliohm, Drain Source Breakdown Voltage 400 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 0.5 to 2.5 V. Tags: Through Hole. More details for G9N40F can be seen below.