The SSM3K37CT from Toshiba is a MOSFET with Continous Drain Current 0.2 A, Drain Source Resistance 1650 to 5600 Milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage -10 to 10 V, Gate Source Threshold Voltage 0.35 to 1 V. Tags: Surface Mount. More details for SSM3K37CT can be seen below.