The XP161A1265PR from Torex Semiconductor is a MOSFET with Continous Drain Current 4 A, Drain Source Resistance 42 to 95 milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage -12 to 12 V, Power Dissipation 2 W. Tags: Surface Mount. More details for XP161A1265PR can be seen below.