The STH170N8F7-2 from STMicroelectronics is a MOSFET with Continous Drain Current 120 A, Drain Source Resistance 2.8 to 3.7 Milliohm, Drain Source Breakdown Voltage 80 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.5 to 4.5 V. Tags: Surface Mount. More details for STH170N8F7-2 can be seen below.