The STD9N65DM6AG from STMicroelectronics is a MOSFET with Continous Drain Current 9 A, Drain Source Resistance 365 to 440 Milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage - 25 to 25 V, Gate Source Threshold Voltage 3.25 to 4.75 V. Tags: Surface Mount. More details for STD9N65DM6AG can be seen below.