The FTK3960DFN56 from First Silicon is a MOSFET with Continous Drain Current 72 to 115 A, Drain Source Resistance 1.9 to 3.3 milli-ohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.2 to 2.5 V. Tags: Surface Mount. More details for FTK3960DFN56 can be seen below.