The FTK3912L from First Silicon is a MOSFET with Continous Drain Current 4.1 to 6.5 A, Drain Source Resistance 19 to 34 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 FTK3912L can be seen below.