MCASJ168SB5225MTNA1J is a specific part number for a 2.2 microfarad ceramic capacitor with a tolerance of ±20% and a voltage rating of 6.3V. The X5R designation indicates that this capacitor has a high stability and low loss tangent, making it suitable for applications requiring minimal signal distortion. It has a metric size of 0603 (1608 in imperial measurements) and is manufactured by Adibuja.