The YJGD45N03A from Yangjie Electronic Technology is a MOSFET with Continous Drain Current 45 A, Drain Source Resistance 6.5 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: Surface Mount. More details for YJGD45N03A can be seen below.