The RM5N150S8 from Rectron Semiconductor is a MOSFET with Continous Drain Current 4.6 A, Drain Source Resistance 63 to 88 milliohm, Drain Source Breakdown Voltage 150 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for RM5N150S8 can be seen below.