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其實雷（Lightning）有很多種、大小差很多，看你要過的是哪種規範。& N9 x+ w7 e/ q4 y) C
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終於在狗糧倉庫翻到一篇文檔，講的是傳統電話網路雷擊保護！
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3) Using Undersized Trace Width and Spacings in Board Layouts1 {, n) s+ E) H; ?
There is much confusion among designers about what sort of trace widths and spacings are appropriate for handling lightning current. Sometimes the designer forgets to consider this at all, and an auto-routed circuit with 6 mil lines and 6 mil spacings suffers extensive lightning damage. On the other hand, some designers are more conservative than they need to be, and specify extremely wide trace width and spacings, causing excessive board area to be consumed.
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- }9 |% F/ ?: cIn general, a minimum trace width of 15 mils in so called “one ounce copper” is required to handle a 10 x 1000 us, 100 amp surge. For voltage breakdown, the spacing should be at least 25 mils for every 1000 volts of peak voltage that the spacing is intended to withstand. Note that depending on the protection scheme being used, the peak voltage differences in the circuit may be limited by the surge protectors.
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楼主
发表于 2025-6-26 10:02
发表于 2025-6-23 14:54
