Editing Characteristic impedance (section)

== Practical examples ==
{| class="wikitable"
|-
! Standard
! Impedance<br>(Ω)
! Tolerance
|- align="center";
| [[Category 5 cable#Characteristics|Category 5]]
| 100
| &nbsp;±5Ω<ref name="drakacom_cat5">{{cite web |title=SuperCat OUTDOOR CAT 5e U/UTP |url=http://communications.draka.com/sites/eu/Datasheets/SuperCat5_24_U_UTP_Install.pdf |archive-url=https://web.archive.org/web/20120316111058/http://communications.draka.com/sites/eu/Datasheets/SuperCat5_24_U_UTP_Install.pdf |archive-date=2012-03-16}}</ref>
|- align="center";
| [[USB#Signaling|USB]]
| &nbsp;90
| ±15%<ref>{{cite web |series=USB in a NutShell |title=Chapter 2 – Hardware |publisher=Beyond Logic.org |url=http://www.beyondlogic.org/usbnutshell/usb2.htm |access-date=2007-08-25}}</ref>
|- align="center";
| [[HDMI]]
| &nbsp;95
| ±15%<ref name=an10798/>
|- align="center";
| [[IEEE 1394]]
| 108
| &nbsp;{{su|b=−2%|p=+3%}}<ref name=ieee1394tdr>{{cite web |title=Evaluation |publisher=materias.fi.uba.ar |url=http://materias.fi.uba.ar/6644/info/reflectometria/avanzado/ieee1394-evalwith-tdr.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://materias.fi.uba.ar/6644/info/reflectometria/avanzado/ieee1394-evalwith-tdr.pdf |archive-date=2022-10-09 |url-status=live |access-date=2019-12-29}}</ref>
|- align="center";
| [[Video Graphics Array#Specifications|VGA]]
| &nbsp;75
| &nbsp;±5%<ref name=vga_klotz>{{cite web |title=VMM5FL |series=pro video data sheets |url=http://www.promusic.cz/soubory/File/Downloads/Data%20sheet/Klotz/Kabely%20pro%20video/VMM5FL__e.pdf |access-date=2016-03-21 |archive-url=https://web.archive.org/web/20160402033004/http://www.promusic.cz/soubory/File/Downloads/Data%20sheet/Klotz/Kabely%20pro%20video/VMM5FL__e.pdf |archive-date=2016-04-02 |url-status=dead }}</ref>
|- align="center";
| [[DisplayPort]]
| 100
| ±20%<ref name=an10798>{{cite web |title=AN10798 DisplayPort PCB layout guidelines |url=https://www.nxp.com/documents/application_note/AN10798.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://www.nxp.com/documents/application_note/AN10798.pdf |archive-date=2022-10-09 |url-status=live |access-date=2019-12-29}}</ref>
|- align="center";
| [[Digital Visual Interface|DVI]]
| &nbsp;95
| ±15%<ref name=an10798/>
|- align="center";
| [[PCI Express|PCIe]]
| &nbsp;85
| ±15%<ref name=an10798/>
|- align="center";
| [[Overhead power line]]
| &nbsp;400
| Typical{{sfn|Singh|2008|p=212}}
|- align="center";
| [[Undergrounding|Underground power line]]
| &nbsp;40
| Typical{{sfn|Singh|2008|p=212}}
|}

The characteristic impedance of [[coaxial cable]]s (coax) is commonly chosen to be {{nowrap|50 Ω}} for [[radio frequency|RF]] and [[microwave]] applications. Coax for [[video]] applications is usually {{nowrap|75 Ω}} for its lower loss.
{{see also|Nominal impedance#50 Ω and 75 Ω}}