The SSM6J512NU from Toshiba is a MOSFET with Continous Drain Current -10 A, Drain Source Resistance 12.4 to 40.1 Milliohm, Drain Source Breakdown Voltage -12 V, Gate Source Voltage -10 to 10 V, Gate Source Threshold Voltage -0.3 to -1 V. Tags: Surface Mount. More details for SSM6J512NU can be seen below.