Re: Effect of colour in SSD heatsinks

On 01/06/2025 21:33, Pimpom wrote:

On 02-06-2025 01:29 am, Liz Tuddenham wrote:

>
  A surface which radiates well will also absorb well.  If there are
other components nearby with higher surface temperatures, a 'radiating'
finish could be a disadvantage because it will absorb more energy than
it radiates.
>

There's that factor too. So a shiny golden heatsink may actually be better than a black one.

Only if there is something red hot nearby. A decent rule of thumb is that with an ambient of 300K and radiative cooling scaling as T^4 the radiative component only really becomes important when deltaT > 30K.
IOW Things that get too hot to touch it becomes a factor to consider.
--
Martin Brown