The IPZ40N04S5L-4R8 from Infineon Technologies is a MOSFET with Continous Drain Current 40 A, Drain Source Resistance 3.9 to 6.7 Mohms, Drain Source Breakdown Voltage 40 V, Gate Source Voltage 16 V, Gate Source Threshold Voltage 1.2 to 2 V. Tags: Surface Mount. More details for IPZ40N04S5L-4R8 can be seen below.