The ES4441 from Hunan Jingxin Microelectronics is a MOSFET with Continous Drain Current -3.2 to -4.2 A, Drain Source Resistance 88 to 127 milli-ohm, Drain Source Breakdown Voltage -60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1.0 to -2.5 V. Tags: Surface Mount. More details for ES4441 can be seen below.