The SSM3K09FU from Toshiba is a MOSFET with Continous Drain Current 0.4 A, Drain Source Resistance 500 to 1700 Milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.1 to 1.8 V. Tags: Surface Mount. More details for SSM3K09FU can be seen below.