The IAUZ40N08S5N100 from Infineon Technologies is a MOSFET with Continous Drain Current 40 A, Drain Source Resistance 8.4 to 14.5 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 IAUZ40N08S5N100 can be seen below.