What does the suffix "C" mean on ATV212W***C?

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Issue :
Suffix "C" on ATV212W***C

Product Line :
Altivar Drive

Environment :
ATV212W

Resolution :
The C1 filter is base on IEC standard, a European standard that is not applicable to the US standard. This standardization will only matter during inspection which, if the unit will be used for US purposes, it will not be an issue.