The RD3H045SP from ROHM Semiconductor is a MOSFET with Continous Drain Current -4.5 to 4.5 A, Drain Source Resistance 110 to 260 Milliohm, Drain Source Breakdown Voltage -45 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -3 to -1 V. Tags: Surface Mount. More details for RD3H045SP can be seen below.