The part number MSAST042SCG6R5CWNA01 refers to a specific CAP CER 6.5PF 25V C0G/NP0 01005 ceramic capacitor from Adibuja. This component features a capacitance of 6.5 pF with an accuracy of ±0.25pF, and it operates at a voltage rating of 25 volts. It is designated as having metric dimensions, with the size being 0402 (the actual size in imperial units would be 01005).