Macbook power (charging) adaptor hot

On occassion the MacBook Power (Charging) adaptor gets almost too hot to touch.  Any insights ?

That will be a function of the session time it has been connected to the MBP and the electrical power that the MBP has required.  I have recorded temperature of 52°c on my power adapter with any noticeable problems.
If you are concerned, place the power adapter on a thick aluminum plate which will act as a heat sink and help dissipate the heat.
Ciao.

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