The AUIRF7309Q from Infineon Technologies is a MOSFET with Continous Drain Current -3 to 4 V, Drain Source Resistance 0.050 to 0.16 Mohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for AUIRF7309Q can be seen below.