The RMP4N70LD from Rectron Semiconductor is a MOSFET with Continous Drain Current 4 A, Drain Source Resistance 2500 to 3200 milliohm, Drain Source Breakdown Voltage 700 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for RMP4N70LD can be seen below.