The RM30P40D3 from Rectron Semiconductor is a MOSFET with Continous Drain Current -30 A, Drain Source Resistance 10.5 to 20 milliohm, Drain Source Breakdown Voltage -40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -2.5 to -1 V. Tags: Surface Mount. More details for RM30P40D3 can be seen below.