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What is the difference between an Extrusion Heat Sink and a Plenum Heat Sink?

April 26, 2017difference Extrusion heat Plenum sink

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What is the difference between an Extrusion Heat Sink and a Plenum Heat Sink?

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Usually the extrusion is made from one solid piece of aluminum where as the plenum types are made of many fins that are bonded to a single aluminum base. The extrusions, in general, do not have as large a cooling capacity as the plenums do for the same volume of space.