The RJF0409JSP from Renesas is a MOSFET with Continous Drain Current 5 A, Drain Source Resistance 70 to 100 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -2.5 to 16 V, Power Dissipation 1.5 W. Tags: Surface Mount. More details for RJF0409JSP can be seen below.