The SSM3H137TU from Toshiba is a MOSFET with Continous Drain Current 2 A, Drain Source Resistance 200 to 295 Milliohm, Drain Source Breakdown Voltage 34 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 0.7 to 1.7 V. Tags: Surface Mount. More details for SSM3H137TU can be seen below.