The NTD3055-150T4G from onsemi is a MOSFET with Continous Drain Current 9 A, Drain Source Resistance 122 to 150 milli-ohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for NTD3055-150T4G can be seen below.