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Japanese Industrial Standards are the standards used for industrial activities in Japan, coordinated by the Japanese Industrial Standards Committee (JISC) and published by the Japanese Standards Association (JSA). The JISC is composed of many nationwide committees and p ...
(JIS) has standard JIS-C-7012 for semiconductor part numbers. The first digit denotes the ''p-n junction count'' ("3" may also denote a dual-gate FET); then follows the letter "S", then: Then follows the ''
Japan Electronics and Information Technology Industries Association The is a Japanese trade organization for the electronics and IT industries. It was formed in 2000 from two earlier organizations, the Electronic Industries Association of Japan and the Japan Electronic Industries Development Association. Hist ...
's Electronic DEvice REgistration Center'' (JEITA-EDEREC)-assigned part number, optionally followed by suffixes (such as "A", "B", "C", or "R", "O", "BL", standing for "Red", "Orange", "Blue" etc.) to denote variants, such as tighter hFE (gain) groupings. Example: 2SD965, but sometimes the "2S" prefix is not marked on the package – a 2SD965 might only be marked "D965"; a 2SC1815 might be listed by a supplier as simply "C1815", thus possibly creating confusion with Pro Electron abbreviated markings, because a transistor marked "D965" might either be a 2SD965 or a BD965.


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JEDEC The JEDEC Solid State Technology Association is an independent semiconductor engineering trade organization and standardization body headquartered in Arlington County, Virginia, United States. JEDEC has over 300 members, including some of the w ...
* Pro Electron *
Mullard–Philips tube designation In Europe, the principal method of numbering vacuum tubes ("thermionic valves") was the nomenclature used by the Philips Koninklijke Philips N.V. (), commonly shortened to Philips, is a Dutch multinational conglomerate corporation that was fou ...
* RMA tube designation *
RETMA tube designation The Radio Electronics Television Manufacturers' Association was formed in 1953, as a result of mergers with other trade standards organisations, such as the RMA. It was principally responsible for the standardised nomenclature for American vacuum ...
* Russian tube designations {{Portal, Electronics Electrical components Electrical standards Electronics lists JIS standards