The RQ3N040ATTB1 from ROHM Semiconductor is a MOSFET with Continous Drain Current -10 to 10 A, Drain Source Resistance 97 to 146 milli-ohm, Drain Source Breakdown Voltage -80 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -2.0 to -4.0 V. Tags: Surface Mount. More details for RQ3N040ATTB1 can be seen below.