The FTK40P04D from First Silicon is a MOSFET with Continous Drain Current -40 A, Drain Source Resistance 12 to 14 milli-ohm, Drain Source Breakdown Voltage -40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1.5 to -3 V. Tags: Surface Mount. More details for FTK40P04D can be seen below.