The YJL3139KAE from Yangjie Electronic Technology is a MOSFET with Continous Drain Current -0.5 A, Drain Source Resistance 580 to 2000 milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage -1.2 to -0.35 V. Tags: Surface Mount. More details for YJL3139KAE can be seen below.