The YJF50G12A from Yangjie Electronic Technology is a MOSFET with Continous Drain Current 50 A, Drain Source Resistance 7.5 to 11 milliohm, Drain Source Breakdown Voltage 120 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Through Hole. More details for YJF50G12A can be seen below.