The Si4186DY from Vishay is a MOSFET with Continous Drain Current 35.8 A, Drain Source Resistance 2 to 3 milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.2 to 2.4 V. Tags: Surface Mount. More details for Si4186DY can be seen below.