S2.2 Non-functional variations in part number should be replaced with wildcard
Manufacturer Part Numbers (MPN) often include variations that are non-functional.
Examples of parameters considered non-functional:
Temperature rating of the component
Packaging information (e.g. reel, tray, tape)
RoHS / PbFree information
To capture every possible combination of part variation would require a large number of derived symbols and is to be avoided.
Where an MPN has options for such non-functional variations, these portions of the MPN should be replaced with a wildcard character (
x). If these non-functional parts of the MPN are at the end of the symbol name then the wildcard should be omitted.