The ESP10N10B from Hunan Jingxin Microelectronics is a MOSFET with Continous Drain Current 3.3 to 4.3 A, Drain Source Resistance 88 to 127 milli-ohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.0 to 2.5 V. Tags: Surface Mount. More details for ESP10N10B can be seen below.