The STB47N50DM6AG from STMicroelectronics is a MOSFET with Continous Drain Current 38 A, Drain Source Resistance 67 to 71 Milliohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage - 25 to 25 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Surface Mount. More details for STB47N50DM6AG can be seen below.