The RM4P30S6 from Rectron Semiconductor is a MOSFET with Continous Drain Current -4.5 A, Drain Source Resistance 42 to 90 milliohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -2.5 to -1.2 V. Tags: Surface Mount. More details for RM4P30S6 can be seen below.