The physical construction of the ceramic dielectric element is determinative. Single-layer ceramic capacitors (853223) have one dielectric layer between electrodes, while multilayer ceramic capacitors (853224) — commonly called MLCCs — stack multiple alternating ceramic and electrode layers. Manufacturer datasheets and technical specifications typically confirm the construction type.

Fixed capacitors designed for power factor correction in 50/60 Hz AC circuits with a reactive power rating of 0.5 kVAR or more classify under 853210, the dedicated power capacitor subheading. Capacitors below that threshold or intended for other circuit functions follow the dielectric-type subheadings (853221–853229).