The RM40P40LD from Rectron Semiconductor is a MOSFET with Continous Drain Current -40 A, Drain Source Resistance 12 to 14 milliohm, Drain Source Breakdown Voltage -40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -3 to -1.5 V. Tags: Surface Mount. More details for RM40P40LD can be seen below.