The specification is for a ceramic capacitor with the following characteristics: CAP CER 680PF 500V C0G/NP0 1812. This capacitor has a capacitance of 680 pF and a voltage rating of 500V. It belongs to the C0G/NP0 type, which is a specific classification of ceramic capacitors known for their stable properties across temperature variations. The 1812 designation refers to its metric size, equivalent to 4532 in other notations.