The YJL3400J from Yangjie Electronic Technology is a MOSFET with Continous Drain Current 4.5 A, Drain Source Resistance 18 to 30 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage 0.5 to 1.2 V. Tags: Surface Mount. More details for YJL3400J can be seen below.