The CAP CER 2.2UF 6.3V X6S 0402 is a ceramic capacitor with specific electrical properties. It has a capacitance value of 2.2 microfarads and operates at a voltage rating of ±20% relative to its nominal value of 6.3 volts. This capacitor comes in the compact 0402 (or 1005 metric) package, denoted by the X6S marking.