The FTK4902DFN56 from First Silicon is a MOSFET with Continous Drain Current 88 to 140 A, Drain Source Resistance 1.7 to 3.0 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 FTK4902DFN56 can be seen below.