The STI300N4F6 from STMicroelectronics is a MOSFET with Continous Drain Current 160 A, Drain Source Resistance 1.7 to 2.2 Milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for STI300N4F6 can be seen below.