I'm looking for PCB EM-relay for switching 25A 380V load, and there is a lack of models on the market.

I have find one of them. The [T9G relay](https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Data%20Sheet%7FT9G_1216%7F0321%7Fpdf%7FEnglish%7FENG_DS_T9G_1216_0321.pdf%7F1-1558661-4) has MSV = 480V, but rated voltage = 277V.
Also in header of the datasheet - "UL approved for 480VAC switching".

What's the true difference between them? Can I use it for 380V delta load switching?

PS switching-arc problem is already solved by parallel TRIAC, so don't touch it.