The RQ6E045SN from ROHM Semiconductor is a MOSFET with Continous Drain Current -4.5 to 4.5 A, Drain Source Resistance 27 to 38 Milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for RQ6E045SN can be seen below.