The YJS2301A from Yangjie Electronic Technology is a MOSFET with Continous Drain Current -3.7 A, Drain Source Resistance 42 to 91 milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -10 to 10 V, Gate Source Threshold Voltage -1 to -0.4 V. Tags: Surface Mount. More details for YJS2301A can be seen below.