The FTK4903P from First Silicon is a MOSFET with Continous Drain Current -34 to -55 A, Drain Source Resistance 11.5 to 22 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: Through Hole. More details for FTK4903P can be seen below.