The IAUC120N04S6N006 from Infineon Technologies is a MOSFET with Continous Drain Current 55 to 405 A, Drain Source Resistance 0.46 to 0.85 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 IAUC120N04S6N006 can be seen below.