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Old 29th October 2012, 10:17 PM   #1
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Default Sources for TO220 heatsinks?

It seems digikey doesn't sell the really big audio heatsinks you typically see in high power applications. The biggest TO220 heatsink I have found on digikey is this one:

RA-T2X-64E Ohmite | RA-T2X-64E-ND | DigiKey
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Old 29th October 2012, 11:19 PM   #2
zlast is offline zlast  United States
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Default Heatsink

[QUOTE=Fusion916;3220182]It seems digikey doesn't sell the really big audio heatsinks you typically see in high power applications. The biggest TO220 heatsink I have found on digikey is this one:

Might help if you gave some information about your application and heat dissipation. You might check with Steve at apexjr.com
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Old 30th October 2012, 03:08 AM   #3
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6 x Medium Heatsinks
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Old 30th October 2012, 03:38 AM   #4
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Quote:
Originally Posted by Fusion916 View Post
It seems digikey doesn't sell the really big audio heatsinks you typically see in high power applications. The biggest TO220 heatsink I have found on digikey is this one:

RA-T2X-64E Ohmite | RA-T2X-64E-ND | DigiKey
If you're using them for regulators you'll be fine. If you're running parallel bipolar transistors - even with low value emitter resistors - you DON'T want to use them. Parallel bipolar transistors REQUIRE a common heatsink to prevent thermal runaway. It would be even better if _all_ the bipolar power transistors in a channel were on one large heatsink.

G
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Old 30th October 2012, 05:07 AM   #5
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One look at a TO220, or in fact any plastic pack transistor and the brain should be saying..." It fits on any flat surface".
Don't feel that you need to use a particular type of heatsink for all T0220 transistors unless of course, you can't use a 1/8'' drill.
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Old 30th October 2012, 06:34 AM   #6
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The DIY store has 2 and 3U versions, check the amp spare parts area. Some drilling may be required but you can do it.
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