Note 9 motherboard

[Kiko78]

 

[Kiko78]

Does anybody know what part is this and why it gets extremly hot??

 

[Hadron]

You can see what's under the cover in the iFixit teardown, but it's not considered interesting enough for them to identify it and at least on my phone the photo doesn't quite have enough resolution to read the component numbers.

 

[marctronixx]

the best people to answer your question is Samsung directly. Why not contact them in your country.