The STD11NM65N from STMicroelectronics is a MOSFET with Continous Drain Current 11 A, Drain Source Resistance 425 to 455 Milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage - 25 to 25 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for STD11NM65N can be seen below.