The Si4670DY from Vishay is a MOSFET with Continous Drain Current 8 A, Drain Source Resistance 19 to 28 milliohm, Drain Source Breakdown Voltage 25 V, Gate Source Voltage -20 to 16 V, Gate Source Threshold Voltage 1 to 2.2 V. Tags: Surface Mount. More details for Si4670DY can be seen below.