The FTK3902DFN56 from First Silicon is a MOSFET with Continous Drain Current 82 to 130 A, Drain Source Resistance 1.2 to 2.4 milli-ohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for FTK3902DFN56 can be seen below.