The 5N20A from Goford Semiconductor is a MOSFET with Continous Drain Current 5 A, Drain Source Resistance 440 to 580 milliohm, Drain Source Breakdown Voltage 200 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for 5N20A can be seen below.