The ESNS21309C from Hunan Jingxin Microelectronics is a MOSFET with Continous Drain Current -77 to -100 A, Drain Source Resistance 4.0 to 7.2 milli-ohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1.0 to -2.0 V. Tags: Surface Mount. More details for ESNS21309C can be seen below.