The BSS138BKW from ROHM Semiconductor is a MOSFET with Continous Drain Current 0.38 A, Drain Source Resistance 0.49 to 4 milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage 20 V, Gate Source Threshold Voltage 0.8 to 2 V. Tags: Through Hole. More details for BSS138BKW can be seen below.