The YJQ4666B from Yangjie Electronic Technology is a MOSFET with Continous Drain Current -7 A, Drain Source Resistance 24.5 to 60.5 milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -10 to 10 V, Gate Source Threshold Voltage -1 to -0.4 V. Tags: Surface Mount. More details for YJQ4666B can be seen below.