The CAP CER 3900PF 10V X7R 0603 is a type of ceramic capacitor with the following specifications: capacitance value of 3900 picofarads, tolerance of ±20%, and operating voltage rating of 10 volts. It has a metric size designation of 1608 (which corresponds to the 0603 imperial size) and conforms to the X7R dielectric material classification.