The STF12NK80Z from STMicroelectronics is a MOSFET with Continous Drain Current 10.5 A, Drain Source Resistance 650 to 750 Milliohm, Drain Source Breakdown Voltage 800 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 4.5 V. Tags: Through Hole. More details for STF12NK80Z can be seen below.