this post was submitted on 20 May 2024
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[โ€“] [email protected] 34 points 3 months ago (1 children)

You'll have that when your voltage overcomes the resistance of the air

[โ€“] [email protected] 4 points 3 months ago

Sometimes it happens even below the arc breakdown voltage via air... Air molecules are slightly less dense along the surface of a smooth flat surface due to molecular 'bounce', so electrons creep along the lower density of a surface.

Hence, creepage on a PCB.