====== Surge Protection on Ethernet ======

  * https://www.bourns.com/pdfs/bourns_ethernet_poe_article.pdf
  * http://www.akrossilicon.com/home/component/jdownloads/finish/3-whitepapers/29-ethernet-esd-compliance-w-as1602-wp12-rev1-3-pdf

{{:howto:electro:unshielded_ethernet_surge_protection.png|}}

{{http://www.semtech.com/images/product/diagram1/1438.jpg}}

===== PCB Spark Gaps =====

  * http://www.youtube.com/watch?v=vfP_65gSSBU
  * Breakdown voltage = (3000 * air_pressure_atm * distance_mm) + 1350
    * 0.1mm = 1650V
    * 0.2mm = 1950V