The RMP3N90LD from Rectron Semiconductor is a MOSFET with Continous Drain Current 3 A, Drain Source Resistance 2800 to 3200 milliohm, Drain Source Breakdown Voltage 900 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Surface Mount. More details for RMP3N90LD can be seen below.