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Old 12th June 2010, 05:15 PM   #1
Nikon1975 is offline Nikon1975  Austria
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Default Insulating Pads

Simple question: how much do you trust insulating pads ? I mean would you mount on an exposed heatsink chip that carries 450 V ?


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Old 12th June 2010, 05:19 PM   #2
Zero Cool is offline Zero Cool  United States
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they make ceramic insulating pads for HV applications.
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Old 12th June 2010, 11:33 PM   #3
nigelwright7557 is offline nigelwright7557  United Kingdom
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They usually work very well.

The only time I have had a problem is with swarf getting into the mix and that is disasterous for the amp. I now always do a multimeter check between drain and heatsink for shorts before powering up.

I had a bit of swarf once stuck in the insulator and couldnt see it, replacing the insulator cured the problem. It was definitely swarf because the multimeter measured a short.
PCBCAD51 pcb design software. 2018 version out now. https://www.ebay.co.uk/sch/i.html?_f...nload&_sacat=0
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Old 13th June 2010, 02:23 PM   #4
mickeymoose is offline mickeymoose  Canada
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Berquist silpad 400 (9mil) is rated at 4500 VAC breakdown voltage with excellent thermal conductivity. Quite expensive though. E
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