The Si4936CDY from Vishay is a MOSFET with Continous Drain Current 5.8 A, Drain Source Resistance 33 to 50 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.2 to 3 V. Tags: Surface Mount. More details for Si4936CDY can be seen below.