The SSM3K329R from Toshiba is a MOSFET with Continous Drain Current 3.5 A, Drain Source Resistance 96 to 289 Milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage 0.4 to 1 V. Tags: Surface Mount. More details for SSM3K329R can be seen below.