The IPZ40N04S5-8R4 from Infineon Technologies is a MOSFET with Continous Drain Current 33 to 40 A, Drain Source Resistance 7 to 9.9 Mohms, Drain Source Breakdown Voltage 40 V, Gate Source Voltage 20 V, Gate Source Threshold Voltage 2.2 to 3.4 V. Tags: Surface Mount. More details for IPZ40N04S5-8R4 can be seen below.