The part number is 0805Y0500821FFR. It's a CAP CER 820PF 50V C0G/NP0 in the 0805 package size. This capacitor has an capacitance value of 820 pF, and it operates within a voltage range of ±1. The material used is ceramic with a dielectric constant of C0G, also known as NP0. It conforms to the 2012 Metric package size specification from Adibuja.