The G5N50 from Goford Semiconductor is a MOSFET with Continous Drain Current 5 A, Drain Source Resistance 1400 milliohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount, Through Hole. More details for G5N50 can be seen below.