The RJ1G12BGN from ROHM Semiconductor is a MOSFET with Continous Drain Current -120 to 120 A, Drain Source Resistance 1.38 to 2.08 Milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for RJ1G12BGN can be seen below.