The Si7478DP from Vishay is a MOSFET with Continous Drain Current 20 A, Drain Source Resistance 6 to 8.8 Milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for Si7478DP can be seen below.