The ES3402A from Hunan Jingxin Microelectronics is a MOSFET with Continous Drain Current 3.0 to 3.9 A, Drain Source Resistance 40 to 69 milli-ohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 0.6 to 1.5 V. Tags: Surface Mount. More details for ES3402A can be seen below.