V-series IPM has VDA and VDN models of the same rating, but what is the difference between them?

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VDA and VDN use different material for their insulating substrates, resulting in separate thermal resistance values. The VDA type uses aluminum oxide, while the VDN type uses high heat-radiation material, with approximately 30% less thermal resistance than that of VDA. It is effective when achieving a lower Tj max. or longer ΔTj power cycle life expectancy.

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