The RTR040N03HZG from ROHM Semiconductor is a MOSFET with Continous Drain Current -4 to 4 A, Drain Source Resistance 34 to 66 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage 0.5 to 1.5 V. Tags: Surface Mount. More details for RTR040N03HZG can be seen below.