The part number is CAP CER 0.039UF 10V X7R 0603, referring to a ceramic capacitor with specific characteristics. It has a capacitance value of 0.039 microfarads and operates at a voltage of 10 volts. The "X7R" designation indicates the type of ceramic material used, which is suitable for applications requiring stable capacitance over a range of temperatures. This component is in a 0603 (1608 metric) size package.