The IPD90N04S4-03 from Infineon Technologies is a MOSFET with Continous Drain Current 90 A, Drain Source Resistance 2.7 to 3.2 Mohms, Drain Source Breakdown Voltage 40 V, Gate Source Voltage 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for IPD90N04S4-03 can be seen below.