The STD70N6F3 from STMicroelectronics is a MOSFET with Continous Drain Current 70 A, Drain Source Resistance 8 to 10.5 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 STD70N6F3 can be seen below.