The RM65N40D3 from Rectron Semiconductor is a MOSFET with Continous Drain Current 65 A, Drain Source Resistance 5 to 10 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 RM65N40D3 can be seen below.