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On 2018-05-03, Tom Del Rosso wrote:
Adam Funk wrote:
Hi,
To attach an LM317 (for example) in the TO-220 format to the
corresponding heat sink (see link below), is it useful to apply any
thermal paste in addition to the flexible mat that comes with the
heat sink?
https://www.aliexpress.com/item/VAKIND-10pcs-lot-Computer-Cooling-Accessories-Heatsink-Heat-Sink-With-Screw-Sets-15-20mm-For-TO/32802123591.html
Thanks.
Obviously the purpose of either of them is to reduce thermal
resistance by conforming to imperfections in the two surfaces, but
obviously using both would have more thermal resistance than either
alone.
If you have grease, use it and throw the pad away. The pad is 10
times as thick as a layer of grease, and has 10 times the thermal
resistance.
I figured the pad is only for situations where you need electrical
insulation there.
Adam Funk wrote:
On 2018-05-03, Tom Del Rosso wrote:
Adam Funk wrote:
Hi,
To attach an LM317 (for example) in the TO-220 format to the
corresponding heat sink (see link below), is it useful to apply any
thermal paste in addition to the flexible mat that comes with the
heat sink?
https://www.aliexpress.com/item/VAKIND-10pcs-lot-Computer-Cooling-Accessories-Heatsink-Heat-Sink-With-Screw-Sets-15-20mm-For-TO/32802123591.html
Thanks.
Obviously the purpose of either of them is to reduce thermal
resistance by conforming to imperfections in the two surfaces, but
obviously using both would have more thermal resistance than either
alone.
If you have grease, use it and throw the pad away. The pad is 10
times as thick as a layer of grease, and has 10 times the thermal
resistance.
I figured the pad is only for situations where you need electrical
insulation there.
I assumed a small heat sink can always be isolated, especially in hobby
projects (which SEB posts are usually about).