The YJL3139KAT from Yangjie Electronic Technology is a MOSFET with Continous Drain Current -0.5 A, Drain Source Resistance 650 to 2000 milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -10 to 10 V, Gate Source Threshold Voltage -1.1 to -0.35 V. Tags: Surface Mount. More details for YJL3139KAT can be seen below.