The BSS138AKA from Nexperia is a MOSFET with Continous Drain Current 0.125 to 0.2 A, Drain Source Resistance 2700 to 13000 milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 0.8 to 1.5 V. Tags: Surface Mount. More details for BSS138AKA can be seen below.