The FTK3960D from First Silicon is a MOSFET with Continous Drain Current 57 to 70 A, Drain Source Resistance 1.9 to 3.4 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 FTK3960D can be seen below.