The RD3G500GN from ROHM Semiconductor is a MOSFET with Continous Drain Current -50 to 50 A, Drain Source Resistance 3.9 to 6.3 Milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for RD3G500GN can be seen below.