The NX138AK from Nexperia is a MOSFET with Continous Drain Current 0.12 to 0.19 A, Drain Source Resistance 3000 to 10000 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 NX138AK can be seen below.