The 5N30A from Goford Semiconductor is a MOSFET with Continous Drain Current 5 A, Drain Source Resistance 1100 to 1300 milliohm, Drain Source Breakdown Voltage 300 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for 5N30A can be seen below.