The FDG6303N from onsemi is a MOSFET with Continous Drain Current 0.5 A, Drain Source Resistance 340 to 600 milliohm, Drain Source Breakdown Voltage 25 V, Gate Source Voltage -0.5 to 8 V, Gate Source Threshold Voltage 1.5 V. Tags: Surface Mount. More details for FDG6303N can be seen below.