The IAUC100N08S5N031 from Infineon Technologies is a MOSFET with Continous Drain Current 100 A, Drain Source Resistance 2.7 to 4.6 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 IAUC100N08S5N031 can be seen below.