The US6J12 from ROHM Semiconductor is a MOSFET with Continous Drain Current -2 to 2 A, Drain Source Resistance 75 to 400 milliohm, Drain Source Breakdown Voltage -12 V, Gate Source Voltage -8 to 0 V, Gate Source Threshold Voltage -1 V to -0.3. Tags: Surface Mount. More details for US6J12 can be seen below.