The part number is CAP CER 680PF 50V C0G/NP0 0805. This designation refers to a ceramic capacitor with specific characteristics: it has a capacitance value of 680 picofarads, operates at a voltage rating of 50 volts, and is classified as a C0G (NP0) type. The device is packaged in the 0805 (2012 Metric) case size.