The IAUS300N08S5N012 from Infineon Technologies is a MOSFET with Continous Drain Current 300 A, Drain Source Resistance 1 to 1.7 Mohms, Drain Source Breakdown Voltage 80 V, Gate Source Voltage 20 V, Gate Source Threshold Voltage 2.2 to 3.8 V. Tags: Surface Mount. More details for IAUS300N08S5N012 can be seen below.