The IPD50N04S3-09 from Infineon Technologies is a MOSFET with Continous Drain Current 43 to 50 A, Drain Source Resistance 7.5 to 9 Mohms, Drain Source Breakdown Voltage 40 V, Gate Source Voltage 20 V, Gate Source Threshold Voltage 2.1 to 4 V. Tags: Through Hole. More details for IPD50N04S3-09 can be seen below.