The STD16N60M6 from STMicroelectronics is a MOSFET with Continous Drain Current 12 A, Drain Source Resistance 260 to 320 Milliohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage - 25 to 25 V, Gate Source Threshold Voltage 3.25 to 4.75 V. Tags: Surface Mount. More details for STD16N60M6 can be seen below.