The RM12N650LD from Rectron Semiconductor is a MOSFET with Continous Drain Current 11.5 A, Drain Source Resistance 290 to 360 milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 4 V. Tags: Surface Mount. More details for RM12N650LD can be seen below.