The NTR4503NT1G from onsemi is a MOSFET with Continous Drain Current 2.5 A, Drain Source Resistance 85 to 140 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for NTR4503NT1G can be seen below.