The STD80N6F6 from STMicroelectronics is a MOSFET with Continous Drain Current 80 A, Drain Source Resistance 4.4 to 5 Milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 3 to 4.5 V. Tags: Surface Mount. More details for STD80N6F6 can be seen below.