The QS8J2 from ROHM Semiconductor is a MOSFET with Continous Drain Current -4 to 4 A, Drain Source Resistance 26 to 132 milliohm, Drain Source Breakdown Voltage -12 V, Gate Source Voltage -10 to 10 V, Gate Source Threshold Voltage -1 to -0.3 V. Tags: Surface Mount. More details for QS8J2 can be seen below.