The RM5N650LD from Rectron Semiconductor is a MOSFET with Continous Drain Current 5 A, Drain Source Resistance 750 to 900 milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 3 to 4 V. Tags: Surface Mount. More details for RM5N650LD can be seen below.