The NTTFD021N08C from onsemi is a MOSFET with Continous Drain Current 24 A, Drain Source Resistance 16.4 to 55 milliohm, Drain Source Breakdown Voltage 80 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for NTTFD021N08C can be seen below.