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Old 23rd October 2010, 07:14 AM   #1
marko is offline marko  United Kingdom
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Default thermal paste?

ok, just bought some Akasa AK-460 thermal paste and don't like the look of it (grey stuff). have i just wasted my money on the wrong stuff? can't believe how difficult it is to get the stuff i want
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Old 23rd October 2010, 07:19 AM   #2
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Is it the same used for CPUs ? Don't use it !! It contains aluminium and it is conductive ,so there's a certain leakage between transistor's case and heatsink.
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Old 23rd October 2010, 07:21 AM   #3
marko is offline marko  United Kingdom
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Quote:
Originally Posted by picowallspeaker View Post
Is it the same used for CPUs ? Don't use it !! It contains aluminium and it is conductive ,so there's a certain leakage between transistor's case and heatsink.
thanks, i knew i had bought the wrong stuff now the search begins for the proper stuff..
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Old 23rd October 2010, 07:37 AM   #4
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Fischer has a very good thermal glue if that is what you need. I use it instead of the pastes if I need a heatsink to be mounted thermally and mechanically to a semiconductor when there is no possibility to tighten it with clips/screws etc. The Farnell partnumber is 121-1723. It is expensive and it is toxic (please read the datasheet before you want to buy it !) when it is still fluid but it is a very good product. As you only need a very tiny drop of it for each heatsink a 5 gram container may last more than a year.

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Old 23rd October 2010, 07:45 AM   #5
marko is offline marko  United Kingdom
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i just want that white stuff that gets everywhere!!
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Old 23rd October 2010, 07:53 AM   #6
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You could go to computer shops and pay extreme prices for rebadged industrial stuff or you could just buy the same product in its industrial packaging for a much lower price:

ELECTROLUBE|HTC10S|HEAT SINK COMPOUND, 10ML, SYRINGE | Farnell Nederland

It is called "heatsink compound" or "heat transfer paste". It only fills up irregularities on the surface of the device that needs to be cooled and the surface of the heatsink. So do not make the standard mistake to apply too much of it as it will deteriorate the situation and perform much worse than it should....

Only a small dot in the center is enough.

BTW it would be better to ask a question and to give somewhat more details on where you need it for. You will get better answers when you do so.
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Last edited by jean-paul; 23rd October 2010 at 07:58 AM.
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Old 23rd October 2010, 08:08 AM   #7
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Old 23rd October 2010, 08:11 AM   #8
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Old 23rd October 2010, 08:23 AM   #9
marko is offline marko  United Kingdom
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it's for a soundstream ref 10.0, just bought a new board for my sink and want to do the job right! the amp has a poyimide insulation film too..
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Old 23rd October 2010, 08:30 AM   #10
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If you mean the film to be polyimide you will need a thermal compound indeed. I would choose a non-conducting thermal compound to avoid issues.

Is it this one ?

http://www.soundbuggy.com/Eric/Car%2...10_0_board.jpg
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Last edited by jean-paul; 23rd October 2010 at 08:35 AM.
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