The BSS138LT from onsemi is a MOSFET with Continous Drain Current 0.2 A, Drain Source Resistance 10000 milliohm, Drain Source Breakdown Voltage 50 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.5 V. Tags: Surface Mount. More details for BSS138LT can be seen below.