What is the numerical difference between footprints marked with "* _M", "* _N", "* _V" and "* _L"?
P.S. I was looking any information in google, but as a result nothing.
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I think they stand for
N-nominal, M-maximum, L-least
Not sure about V though.
Also if you look closely, for example, at SMD0805's N, M and L variants, you will find that they increase in size, just by little.
About why are they used when there isn't much of a difference in their sizes, read this: https://blogs.mentor.com/tom-hausherr/blog/2011/01/28/pcb-design-perfection-starts-in-the-cad-library-part-12/