The Si7434ADP from Vishay is a MOSFET with Continous Drain Current 12.3 A, Drain Source Resistance 125 to 170 Milliohm, Drain Source Breakdown Voltage 250 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for Si7434ADP can be seen below.