The STL10N65M2 from STMicroelectronics is a MOSFET with Continous Drain Current 4.5 A, Drain Source Resistance 850 to 1000 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 STL10N65M2 can be seen below.