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Why do so few offtheshelf inductors have dots?

cupoftea

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Easy peasy

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many companies do not know or care about the "hot" side of the choke, i.e. that part that normally goes to the inner part of the wdg ...

1626732469073.png
 

cupoftea

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thanks, yes coilcraft and TDK are the only ones i know that show it, and even they dont show it on all their chokes
 

mtwieg

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Huh, I wasn't aware the dot was actually relevant to the winding configuration and EMC. Probably doesn't matter so much for molded inductors. Also not going to matter for windings with a single layer, which probably includes a lot of the IHLP parts. Still something good to keep in mind in the future.
 

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