The STD80N6F7 from STMicroelectronics is a MOSFET with Continous Drain Current 40 A, Drain Source Resistance 6.8 to 8 Milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for STD80N6F7 can be seen below.