The FTK0504DFN33 from First Silicon is a MOSFET with Continous Drain Current 50 A, Drain Source Resistance 4.5 to 7.5 milli-ohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2 V. Tags: Surface Mount. More details for FTK0504DFN33 can be seen below.