The BSS138PDW from GALAXY CENTURY MICROELECTRONICS is a MOSFET with Continous Drain Current 0.29 to 0.36 A, Drain Source Resistance 1000 to 4500 milli-ohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage ±20 V, Gate Source Threshold Voltage 0.8 to 1.5 V. Tags: Surface Mount. More details for BSS138PDW can be seen below.