The electronic part GCM1555C1H821JA16D is a Multilayer Ceramic Capacitor (MLCC) manufactured by the Murata Company. It is an SMD/SMT (Surface Mount Device/Surface Mount Technology) component. It features a size 0402, which is a standard in the electronic industry and is also known as a metric 1005. This item has an 820pF capacitance and a voltage rating of 50V. It utilizes a C0G (Class 0 or 'C-Zero-G') dielectric material, which, in this case, has a tolerance of +/- 5%. The C0G dielectric, like other dielectrics, has numerous advantages, such as a low temperature coefficient of capacitance (TDK rating) and excellent volumetric efficiency. This item, due to its small size, is optimized for portable applications as it provides a high capacitance in a small and cost-effective package.