The G50N03J from Goford Semiconductor is a MOSFET with Continous Drain Current 65 A, Drain Source Resistance 5 to 12 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Through Hole. More details for G50N03J can be seen below.