The FTK05N04A from First Silicon is a MOSFET with Continous Drain Current 4 to 5 A, Drain Source Resistance 30 to 60 milli-ohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.0 to 2.5 V. Tags: Surface Mount. More details for FTK05N04A can be seen below.