Looking for a small heat sink for TO-126

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#2
Alan0354 said:
I need heat sink for TO126 on pcb. I am looking for a vertical, solderable foot onto the pcb. I want a small one that is 2W to 3W only.
I saw some in digikey that look like having solderable feet, but when I look at the data sheet, they did not specify that.
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Yes, most all of those for TO126 on the page linked have mounting pins. You can check the mfr data sheet for full info and drawings.
It may not be explicitly mentioned, but if it's on the drawing, it's there. Bear in mind that some sinks have mounting tabs that are not solderable,
instead you bend them. It should mention this also.
 
#3
Check the material they are made of. You cannot solder aluminum.

I agree with rayma, a lot of them the tabs poke through holes on the board, and on the other side, you give them a twist, a lot like the tabs on an old can cap.
 
#4
Enzo said:
Check the material they are made of. You cannot solder aluminum.
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Not quite correct. You can solder aluminum, you'll need special flux, solder and sometimes an inert gas like argon. There was a huge breakthrough announced in CH this week of a company figuring out how to solder aluminum and stainless...go figger.

2 deg C/W implies a lot of heat that a TO-126 device is dissipating, are you sure this is the correct thermal impedance?
 
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