The RM120N30D3 from Rectron Semiconductor is a MOSFET with Continous Drain Current 120 A, Drain Source Resistance 2.4 to 6.2 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for RM120N30D3 can be seen below.