The part number for a specific 2220-sized capacitor is CAP CER 680PF 3KV C0G/NP0. It features a capacitance of 680 pF with ±10% tolerance and can withstand voltages up to 3000V (3kV). This component is classified as a ceramic capacitor, specifically utilizing the C0G or NP0 dielectric material, which falls under the 1B temperature characteristic.