The XP161A11A1PR-G from Torex Semiconductor is a MOSFET with Continous Drain Current 4 A, Drain Source Resistance 50 to 105 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Power Dissipation 2 W. Tags: Surface Mount. More details for XP161A11A1PR-G can be seen below.