The YJD50N06A from Yangjie Electronic Technology is a MOSFET with Continous Drain Current 50 A, Drain Source Resistance 11 to 17 milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for YJD50N06A can be seen below.