The FTK4438 from First Silicon is a MOSFET with Continous Drain Current 8.2 A, Drain Source Resistance 22.0 to 30 milli-ohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.0 to 3.0 V. Tags: Surface Mount. More details for FTK4438 can be seen below.