The UPA1856GR from Renesas is a MOSFET with Continous Drain Current -4.5 to 4.5 A, Drain Source Resistance 37 to 77 milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -12 to 12 V, Gate Charge 6 nC. Tags: Surface Mount. More details for UPA1856GR can be seen below.