The Si5442DU from Vishay is a MOSFET with Continous Drain Current 25 A, Drain Source Resistance 8 to 13.5 Milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage -8 to 8 V, Gate Source Threshold Voltage 0.4 to 0.9 V. Tags: Surface Mount. More details for Si5442DU can be seen below.