Editing Diode (section)

===Numbering and coding schemes===
There are a number of common, standard and manufacturer-driven numbering and coding schemes for diodes; the two most common being the [[Electronic Industries Alliance|EIA]]/[[JEDEC]] standard and the European [[Pro Electron]] standard:

====EIA/JEDEC====
The standardized 1N-series numbering ''[[JEDEC#Origins|EIA370]]'' system was introduced in the US by EIA/JEDEC (Joint Electron Device Engineering Council) about 1960. Most diodes have a 1-prefix designation (e.g., 1N4003). Among the most popular in this series were: 1N34A/1N270 (germanium signal), 1N914/[[1N4148 signal diode|1N4148]] (silicon signal), [[1N400x general-purpose diodes|1N400x]] (silicon 1A power rectifier), and [[1N58xx schottky diodes|1N580x]] (silicon 3A power rectifier).<ref>{{cite web|url=http://www.jedec.org/Home/about_jedec.cfm |title=About JEDEC |publisher=Jedec.org |access-date=2008-09-22}}</ref><ref>{{cite web|url=http://news.elektroda.net/introduction-dates-of-common-transistors-and-diodes-t94332.html |title=Introduction dates of common transistors and diodes? |publisher=EDAboard.com |date=2010-06-10 |access-date=2010-08-06 |url-status=dead |archive-url=https://web.archive.org/web/20071011133032/http://news.elektroda.net/introduction-dates-of-common-transistors-and-diodes-t94332.html |archive-date=October 11, 2007 }}</ref><ref>{{cite web|url=http://semiconductormuseum.com/Museum_Index.htm |title=Transistor Museum Construction Projects Point Contact Germanium Western Electric Vintage Historic Semiconductors Photos Alloy Junction Oral History |publisher=Semiconductormuseum.com |author=I.D.E.A |access-date=2008-09-22}}</ref>

====JIS====
The [[JIS semiconductor designation]] system has all semiconductor diode designations starting with "1S".

====Pro Electron====
The European [[Pro Electron]] coding system for active components was introduced in 1966 and comprises two letters followed by the part code. The first letter represents the semiconductor material used for the component (A = germanium and B = silicon) and the second letter represents the general function of the part (for diodes, A = low-power/signal, B = variable capacitance, X = multiplier, Y = rectifier and Z = voltage reference); for example:
* AA-series germanium low-power/signal diodes (e.g., AA119)
* BA-series silicon low-power/signal diodes (e.g., BAT18 silicon RF switching diode)
* BY-series silicon rectifier diodes (e.g., BY127 1250V, 1A rectifier diode)
* BZ-series silicon Zener diodes (e.g., BZY88C4V7 4.7V Zener diode)

Other common numbering/coding systems (generally manufacturer-driven) include:
* GD-series germanium diodes (e.g., GD9){{spaced ndash}}this is a very old coding system
* OA-series germanium diodes (e.g., OA47){{spaced ndash}}a [[Mullard–Philips tube designation|coding sequence]] developed by [[Mullard]], a UK company