The FTK04N15 from First Silicon is a MOSFET with Continous Drain Current 2.5 to 4 A, Drain Source Resistance 52 to 85 milli-ohm, Drain Source Breakdown Voltage 150 V, Gate Source Voltage -25 to 25 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for FTK04N15 can be seen below.