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What does the U suffix mean at the end of an ATV AC drive part number, such as ATV66D79N4U?

Issue:
Meaning of the U suffix at the end of an Altivar drive part number.

Product Line:
Altivar drives

Environment:
All

Cause:
Customer has a drive with a 'U' at the end of the part number

Resolution:
It means the literature provided with the AC drive will be for the United States, in English. The U suffix was used at the end of the complete part numbers for the ATV11, ATV16, ATV18, ATV28, ATV56, ATV66 and ATV58 AC drives when they were ordered for use in the United States.