The FTK04N15T from First Silicon is a MOSFET with Continous Drain Current 4 A, Drain Source Resistance 130 to 160 milli-ohm, Drain Source Breakdown Voltage 150 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.5 to 2.5 V. Tags: Surface Mount. More details for FTK04N15T can be seen below.