A ceramic capacitor with the designation CAP CER 680 PF 500V NP0(C0G) 121 has a capacitance value of 680 pF and operates within a voltage range of ±2 500V. This component is classified as a C0G, or NP0 type, which refers to a specific grade of ceramic material known for its stable temperature characteristics. The capacitor's physical dimensions are in the metric format, designated as 1210 (3225 Metric).