The SSM3K388R from Toshiba is a MOSFET with Continous Drain Current 2 A, Drain Source Resistance 72 to 99 milli-ohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage ±20 V, Gate Source Threshold Voltage 1.1 to 2.1 V. Tags: Surface Mount. More details for SSM3K388R can be seen below.