The IAUT300N08S5N014 from Infineon Technologies is a MOSFET with Continous Drain Current 230 to 300 A, Drain Source Resistance 1.1 to 2.1 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 IAUT300N08S5N014 can be seen below.