The STD13N50DM2AG from STMicroelectronics is a MOSFET with Continous Drain Current 11 A, Drain Source Resistance 320 to 360 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 STD13N50DM2AG can be seen below.