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   sci.electronics.basics      Elementary questions about electronics      72,318 messages   

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   Message 70,560 of 72,318   
   jurb6006@gmail.com to All   
   Re: Using a TO-220 heat sink   
   03 May 18 12:22:39   
   
   >"** The TO220 heatsinks in the pic are only good for a couple of watts in   
   free air - so device dissipation is low"   
      
   With all them pictures in there who knows exactly what you're getting ? Is it   
   5 of the finned pieces and 5 of the ones bent in a rectangle ?   
      
   >"Device temp will only vary a few degrees using different mounting   
   interfaces. "   
      
   Yeah, because they're not dissipating shit. There isn't enough square area   
   there to make it even worth figuring out. I wouldn't go over about double free   
   air with those. And if they sit down flat on a PC board that will impede the   
   airflow.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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