The part number is CAP CER 680PF 63V X7R 1206. It represents a ceramic capacitor with the following specifications: capacitance of 680 picofarads, tolerance of ±20%, and voltage rating of 63 volts. The X7R designation indicates that it has high temperature coefficient characteristics suitable for applications involving significant thermal stress. This component is available in a 1206 (3216 metric) case size.