The YJQ40P03AJ from Yangjie Electronic Technology is a MOSFET with Continous Drain Current -40 A, Drain Source Resistance 9 to 16 milliohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -2 to -1 V. Tags: Surface Mount. More details for YJQ40P03AJ can be seen below.