The NTTFS1D4N04XMTAG from onsemi is a MOSFET with Continous Drain Current 126 to 178 A, Drain Source Resistance 1.24 to 1.43 milli-ohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.5 to 3.5 V. Tags: Surface Mount. More details for NTTFS1D4N04XMTAG can be seen below.