The RM30P55LD from Rectron Semiconductor is a MOSFET with Continous Drain Current -30 A, Drain Source Resistance 30 to 40 milliohm, Drain Source Breakdown Voltage -55 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -4 to -2 V. Tags: Surface Mount. More details for RM30P55LD can be seen below.