The Si5513CDC from Vishay is a MOSFET with Continous Drain Current 3.7 A, Drain Source Resistance 45 to 255 Milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage -1.5 to 1.5 V. Tags: Surface Mount. More details for Si5513CDC can be seen below.