The RM2312 from Rectron Semiconductor is a MOSFET with Continous Drain Current 4.5 A, Drain Source Resistance 18 to 45 milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage 0.5 to 1.2 V. Tags: Surface Mount. More details for RM2312 can be seen below.