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What the best way to mount HIGH voltage semiconductors to grounded coolers?
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Wolfram:
They didn't specify it. This is a company that also does not provide any mechanical data on their mechanical products, and no thermal data on their thermal products so that's to be expected. Needless to say, we don't deal with them any more. The reduced capacitance from alumina with similar thermal performance reduced switching losses and EMI challenges, so there's no great motivation to make a kapton solution work in this application.
001:
Hey Hey

Ho to do it without rocket since?
stj:
did i miss it, or was the working voltage not mentioned??
i'm thinking berilium-oxide spacers - old-school tech.
Le_Bassiste:

--- Quote from: 001 on November 19, 2018, 06:23:06 pm ---Hey Hey

Ho to do it without rocket since?

--- End quote ---

 :-DD if i get it correctly from your opening post, the important keywords are "600V" and "grounded heatsink".
hence i  assume that your application is mains-connected and requires double or reinforced isolation, so you have to consult the applicable safety standards for your application wrt voltage categories, etc.
have a look at silicone tubing for power transistors,
https://thermal.henkel-adhesives.com/en/eimea/thermal-materials-products/product-detail/sil-pad-400.html
mounting clips (already mentioned by others in this thread) and heatsinks that are made to accomodate those clips.
https://www.digikey.de/en/product-highlight/a/aavid-thermalloy/max-clip-heat-sinks
again, keep in mind that you will have to use double or reinforced isolation for your application.







N2IXK:
Beryllium Oxide "thermal links" were used on conduction cooled vacuum tubes, where the anode may be operating at thousands of volts above ground.

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