Hello,

Can anyone help me with calculating thermal resistance?

 

Hello,

Here is an article on heasinks, that will also explain thermal resistance:

ESP - Heatsink design and transistor mounting

ESP - How to calculate, design and size heatsinks for amplifiers, power supplies and other electronic equipment. Includes device mounting, thermal resistance, measurement techniques, etc.

sound-au.com

Bertus

 

Does this help?

https://eepower.com/tools/thermal-resistance-calculator/

 

Very helpful. Thank you.