The Si4532CDY from Vishay is a MOSFET with Continous Drain Current 6 A, Drain Source Resistance 38 to 140 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1 to 3 V. Tags: Surface Mount. More details for Si4532CDY can be seen below.