The GT100N12K from Goford Semiconductor is a MOSFET with Continous Drain Current 65 A, Drain Source Resistance 9.5 to 12 milliohm, Drain Source Breakdown Voltage 120 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.5 to 3.5 V. Tags: Surface Mount. More details for GT100N12K can be seen below.