The FTK2603Z from First Silicon is a MOSFET with Continous Drain Current -38 to -60 A, Drain Source Resistance 6 to 16 milli-ohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage -0.3 to -1.0 V. Tags: Surface Mount. More details for FTK2603Z can be seen below.