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what is the meaning of H7 at the end of the part number XY2CH14290H7.

General rule: a reference is followed by H4 in waiting the UL and CSA approvals delivered for the American market, if it is technically allowed by the US requirements. Of course, when the UL & CSA certifications are confirmed, the H4 is replaced by H7 in the reference. Technically both references are the same, difference is only the certifications.
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