Conec part number 16-002190 shows up on our site as “16-002190E” (Digi-Key number 626-1724-ND), yet the datasheet and other public documentation do not mention the “E” at the end or explain what it describes.
In this case it is a packaging suffix. The default part number denotes the bulk version, while the E marks individual packaging. The specifications of the part itself are not changed from one version to the other.