The XP161A1355PR-G from Torex Semiconductor is a MOSFET with Continous Drain Current 4 A, Drain Source Resistance 37 to 150 milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage -8 to 8 V, Power Dissipation 2 W. Tags: Surface Mount. More details for XP161A1355PR-G can be seen below.