The SiA446DJ from Vishay is a MOSFET with Continous Drain Current 7.7 A, Drain Source Resistance 145 to 250 Milliohm, Drain Source Breakdown Voltage 150 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.5 to 3.5 V. Tags: Surface Mount. More details for SiA446DJ can be seen below.