The Si4425DDY from Vishay is a MOSFET with Continous Drain Current -19.7 A, Drain Source Resistance 8 to 16.5 milliohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1.2 to -2.5 V. Tags: Surface Mount. More details for Si4425DDY can be seen below.