The IAUC45N04S6N070H from Infineon Technologies is a MOSFET with Continous Drain Current 14 to 55 A, Drain Source Resistance 5.6 to 9 Mohms, Drain Source Breakdown Voltage 40 V, Gate Source Voltage 20 V, Gate Source Threshold Voltage 2.2 to 3 V. Tags: Surface Mount. More details for IAUC45N04S6N070H can be seen below.