The SSM3J143TU from Toshiba is a MOSFET with Continous Drain Current -5.5 A, Drain Source Resistance 24.9 to 88.4 Milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -8 to 6 V, Gate Source Threshold Voltage -1 to -0.3 V. Tags: Surface Mount. More details for SSM3J143TU can be seen below.