The HUF75639S3ST from onsemi is a MOSFET with Continous Drain Current 56 A, Drain Source Resistance 21 to 25 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 HUF75639S3ST can be seen below.