The FTK4903Z from First Silicon is a MOSFET with Continous Drain Current -24 to -38 A, Drain Source Resistance 11.3 to 21 milli-ohm, Drain Source Breakdown Voltage -40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1.0 to -2.5 V. Tags: Surface Mount. More details for FTK4903Z can be seen below.