The HUF75645S3ST from onsemi is a MOSFET with Continous Drain Current 75 A, Drain Source Resistance 11.5 to 14 milliohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for HUF75645S3ST can be seen below.