| ACT | Actel (fabs MAT, Chartered Semi, WIN, TI) 1985-, MSE 2010 11 | |
| AD | Analog Devices Inc, active | |
| ADAM | Adam Tech, New Taipei City (TW), active | http://www.adam-tech.com/ |
| ADS | a/d/s/ (JP), inactive | |
| AEG | AEG 1883-1982, inactive | |
| AGE | Agere Systems, LSI Logic | |
| AGI | Agilent Technologies, AVA | |
| AI | Alpha Industries Inc, SKY 2002 with part of CON | |
| Aimtec | Aimtec (CA), active | http://www.aimtec.com/ |
| Airpax | Airpax / Sensata Technologies | http://airpax.sensata.com/portal/ |
| AKC | Asahi Kasei Corp. (JP), active | |
| Alder | Alder Optomechanical Corp., Hsinchu (TW), active | https://www.alder.com.tw/?lang=en-US |
| ALG | Allegro MicroSystems Inc., Manchester NH (US), 1990-, active | https://www.allegromicro.com/en/ |
| ALL | Alliance Semiconductor Corp , Santa Clara CA (US) 1985-2006, Alliance Memory active (only legacy memory) | https://www.alliancememory.com/ |
| ALO | Analogic Corporation, Peabody MA (US), active | https://www.analogic.com/ |
| ALPS | Alps Electric Co., Ltd. (JP), active | |
| ALT | Altera, INT 2015 12 | |
| AMD | Advanced Micro Devices, active | |
| AMI | AMI Semiconductor, ONS 2007 12 | |
| AMIC | AMIC Technology (TW), active | http://www.amictechnology.com |
| AMP | Ampere Inc., Tokyo (JP) 1971-, active | https://www.ampere.co.jp/ |
| Amphenol | Amphenol (incl. Piher Spain, Tuchel, FCI), active | |
| AMS | Advanced Monolithic Systems Inc., Livermore CA (US), active | http://www.advanced-monolithic.com |
| ANAD | Anadigics, Inc., GAL 2015 11 | |
| APT | Advanced Power Technology, MSE 2006 4 | |
| APX | Apex Microtechnology, CIR 2007 | |
| Arcotronics | Arcotronics, Kemet 2007 | |
| AST | Aster, inactive | |
| Astec | Astec / Artesyn Power GmbH / ETASYN GmbH, active | https://www.artesyn.com/ |
| ATM | Atmel, MCH 2016 1 | |
| ATS | Advanced Thermal Solutions, Inc., Norwood MA (US), active | http://www.qats.com/ |
| ATT | AT&T Microelectronics (US), Lucent 1996, AGE | |
| Aucon | Aucon, inactive | |
| Augat | Augat Inc., T&B 1996, TYC 2000 | |
| AUO | AU Optronics, Benq Group, Hsinchu (TW), active | https://www.auo.com/en-global |
| AVA | Avago (after merger Avago, a Broadcom company), BRO | |
| AVX | AVX, KYO 1990, active | |
| Axon | AXON CABLE S.A.S., Montmirail (FR), active | http://www.axon-cable.com |
| BB | Burr-Brown, TI 2000 | |
| BCC | BC Components, VIS 2002 | |
| Blaupunkt | Blaupunkt (Bosch Group) 1923-, active | |
| Block | BLOCK Transformatoren-Elektronik GmbH, Verden (DE) 1939-, active | https://www.block.eu |
| BOS | Bosch, active | |
| Bourns | Bourns, active | |
| BRO | Broadcom, AVA 2015, active | |
| BTR | Brooktree (fabs Chartered Semi, EPS, TSMC) 1981-, ROC 1996 | |
| Cambion | Cambion Electronics, Castleton (GB), active | http://wwwcambion.com |
| CAT | Catalyst Semiconductor, ONS 2009 8 | |
| CC | ||
| CCR | Coilcraft, Cary IL (US) 1945-, active | https://www.coilcraft.com/ |
| CCT | Crystal Clear Technology Sdn Bhd,, Subang (MY), active | http://www.cct.com.my/ |
| CDE | Cornell Dubilier Electronics, Inc. (US) 1909-, active | |
| CDIL | Continental Device India Ltd. (IN), active | http://www.cdil.com/ |
| CDT | Power Convertibles / C&D Technologies, MUR (only DC/DC) | |
| CE | ||
| CEN | Central Semiconductor, Hauppauge NY (US), active | https://www.centralsemi.com/ |
| Chinfa | Chinfa Electronics Ind. Co., Ltd., Taipei (TW), active | http://www.chinfa.com/ |
| ChinNan | Chin Nan Precision Electronics Co., Ltd., Tainan (TW), active | https://www.chinnan.com.tw/ |
| Cincon | Cincon Electronics Co., Ltd., Taipei (TW), active | https://www.cincon.com/ |
| CIR | Cirrus Logic Inc,. Austin TX (US), active | https://www.cirrus.com/ |
| Classic | Classic Service Parts GmbH, Koenig | |
| CMD | California Micro Device Corp., ONS 2010 3 | |
| CMO | Chimei Innolux Corporation, Zhunan (TW), active | https://www.innolux.com/tw/ |
| Cogema | Cogema srl, Merone CO (IT), active | http://www.cogema.it/ |
| COM | COM Remote Controls | |
| CON | Conexant Systems Inc., Synaptics 2017 7 | |
| CP | Computer Products, Artesyn 1997 with Zytec | |
| CPC | CP Clare, GI 1967, IXS 2002 6 | |
| CPS | Chips & Technologies, INT 1998 | |
| CRD | Crydom Inc. / Sensata Technologies, active | https://www.sensata.com/products/relays/solid-state-relays |
| CRY | Crystal Semiconductor, CIR | |
| CSI | Cherry Semiconductor, ONS 2000 4 | |
| CTI | Crystal Technology, Inc., inactive | |
| CTS | CTS Corporation, Lisle IL (US) 1896-, active | https://www.ctscorp.com |
| CYE | Changshu Yinyang Electronics Co., Ltd. (CN), active | https://yinyangqyl.com/ |
| CYP | Cypress Semiconductor, INF 2019 | |
| DAE | Daewoo (ROC), active | |
| DAL | Dallas Semiconductor, MAX 2001 | |
| Darfon | Darfon Electronics Corp., Benq Group, Taoyuan (TW) 1997-, active | https://www.darfon.com.tw/ |
| DAT | Datel, MUR Power Solutions 2007 8 | |
| DDD | Data Delay Devices Inc., Clifton NJ (US) 1964-, active | https://www.datadelay.com/ |
| Delta | Delta Products Corp., Fremont (US), active | http://www.delta-fan.com/ |
| DII | Diodes Inc., active | |
| DIO | Diotec Semiconductor AG, Heitersheim (DE), active | |
| DIT | Displaytech Ltd. (HK), active | http://www.displaytech.com.hk |
| DLA | Lambda GmbH, 2004, Densei Lambda 2006, TDK-Lambda 2008, active | |
| DSI | Discrete Semiconductor Industries, Geretsried (DE), active | http://www.dsi-halbleiter.de |
| EA | ELECTRONIC ASSEMBLY GmbH, Gilching (DE), active | https://www.lcd-module.de |
| EAI | Electronic Arrays, Inc., NEC 1978 | |
| Eaton | Eaton (incl Cooper Power Systems, Cooper Electronic Technologies, Cannon), active | https://www.eaton.com/ |
| EIC | Electronics Industry Company (EIC), Bangkok (TH) 1984- | http://www.eicsemi.com |
| ELA | Elantec, ITS 2002 | |
| Eldor | Eldor Corporation, Orsenigo (IT) 1972-, active | |
| ELP | Elpida (JP) 1999-, MTE 2013 7 | |
| EMC | EMC Technology / Smiths Interconnect (incl Kaelus, Radio Waves, TECOM, TRAK, LORCH, TRAK Limited, Millitech), active | https://www.smithsinterconnect.com/ |
| Epcos | Epcos AG (including Siemens Matsushita Components), TDK 2010 | |
| EPS | Seiko Epson (JP), active | |
| Erdiba | Erdiba Service Parts (ESP) / Erdiba AG, Sirnach (CH) 1996-2011, inactive | |
| ERG | Endicott Research Group, Inc., Endicott NY (US), active | http://www.ergpower.com/ |
| ERI | Ericsson Components AB (SE), NJR 1999 (only industrial IC), active | http://www.ericsson.se/microe/ |
| Erni | ERNI Electronics GmbH & Co. KG 1956-, TE 2021 | |
| ERO | (Ernst) Roederstein GmbH 1958-1993, VIS 1993 | |
| ETEC | E-tec Interconnect AG, Lengnau (CH), active | http://www.e-tec.ch |
| ETR | EtronTechnology, Inc. (TW) 1991-, active | https://etron.com/ |
| Ettinger | Ettinger GmbH, Brunnthal (DE), active | https://www.ettinger.de/ |
| EUR | Eurosil (ex Diehl Uhren ICs), TEM | |
| EVL | Everlight Electronics Co., Ltd. (TW) 1983-, active | https://en.everlight.com/ |
| EXC | Excel Semiconductor Co. Ltd., Suzhou (CN), active | http://www.excel-semi.com/ |
| EXL | Exel Microelectronics, EXR, ROH | |
| EXR | Exar Corporation 1971-2017, MaxLinear 2017 5 | |
| FAB | Fabrimex AG / Exista AG, Bubikon (CH), active | https://www.fabrimex.ch/ |
| FAG | Fagor Electrónica, Mondragon (ES), Insolvenz 2013 11 | |
| Falcom | FALCOM GmbH, Langewiesen (DE), active | https://www.falcom.de |
| FCI | FCI Connectors, Amphenol 2016 | |
| FEC | Fuji Electric Corporation (JP) 1923-, active | |
| FER | Ferranti (UK) 1885-1994, GEC 1994 | |
| FEVSE | Funai (FUNAI ELECTRIC-VIDEO SERVO SYSTEM), inactive | |
| FOX | Fox Electronics, Abracon | https://abracon.com/brands/fox |
| FRE | Freescale Semiconductor (US) 2004-2015, NXP 2015 12 | |
| FSC | Fairchild Semiconductor 1957-, ONS 2016 9 | |
| FUJ | Fujitsu (including Takamisawa 1996), active | |
| GAL | GaAs Labs LLC (incl Sirenza, Mimix, Macom, Nitronex, Mission), active | https://www.gaaslabs.com/ |
| GDE | Gestión de Desarrollos Electrónicos, S.A. (ES) 1984-, active | |
| GDS | Goldstar (ROC) 1956-1995, LGE 1995 | |
| GE | General Electric, active | |
| GI | General Instruments, MCH 1989, GS 1997 | |
| GIG | GIGA A/S, Copenhagen (DK) 1988-2000, INT 2000 | |
| GL | G-Link Technology, Hsinchu (TW), active | http://www.glink.com.tw/glinkeng/ |
| Grayhill | Grayhill, Inc., La Grange IL (US), active | https://www.grayhill.com/ |
| GREEN | GREEN, inactive | |
| Grundig | Grundig 1930-2003, inactive | |
| GS | General Semiconductor, VIS 2001 11 | |
| GTE | GTE Microcircuits, Tempe AZ (US), CMD 1987 | |
| Hahn | HAHN GmbH & Co. KG, Hungen (DE), active | http://www.hahn-trafo.com |
| Halo | Halo Electronics, Santa Clara CA (US), active | https://www.haloelectronics.com/ |
| Hamlin | Hamlin 1949-2013, LIF 2013 | |
| HAR | Harris Semiconductor, ITS 1999 | |
| HARV | Harvatek Corporation (TW), 1995- | https://www.harvatek.com/ |
| HFO | Halbleiterwerk Frankfurt/Oder, inactive | |
| HIT | Hitachi incl. Kaohsiung Hitachi Electronics Co., Ltd., REN | |
| HON | Honeywell (Saia Burgess), active | |
| HPC | Hewlett-Packard Components, AGI, AVA | |
| HQ | HQ Elektronika Kereskedelmi és Szolgáltató Kft. (HU), active | https://www.hqelektronika.hu/hu/ |
| HR | HR Diemen (ES), active | https://www.hrdiemen.com/ |
| HRS | Hirose Electric Co., Ltd. (JP), active | |
| HSE | REMO-HSE Hochspannungselektronik GmbH, Rattiszell (DE) | http://www.remo-hse.de |
| HSM | Hi-Sincerity Microelectronics Corp. (TW), active | http://www.hsmc.com.tw/ |
| HTT | Hittite Microwave Corporation 1985-, AD 2014 | |
| HYN | SK Hynix / Hynix Semiconductor (ROC), active | |
| HYU | Hyundai (ROC) 1983-1999, LGE 1999, HYN 2001 | |
| IAM | hybrid | |
| ICH | iC-Haus GmbH, Bodenheim (DE), active | https://www.ichaus.de/ |
| ICI | Integrated Circuit Solution, Inc. (TW), ISSI 2005 | |
| ICS | Integrated Circuit Systems, Inc., IDT 2005 6 | |
| IDT | Integrated Device Technology 1980-, REN 2019 3 | |
| INF | Infineon Technologies AG, Neubiberg (DE), active | |
| INT | Intel, active | |
| IR | International Recifier, INF 2014 | |
| ISC | Inchange Semiconductor Co., Ltd (CN), active | http://www.iscsemi.cn/en/ |
| ISSI | Integrated Silicon Solutions Inc. (US), active | |
| ITS | Intersil 1967-, HAR 1988, Intersil 1999-, REN 2017 2 | |
| ITT | ITT Intermetall, MCR 1997 | |
| ITT/Nokia | ITT/Nokia, inactive | |
| IXS | Ixys Semiconductor 1983-, LIF 2018 | |
| Jauch | Jauch Quartz GmbH, Villingen-Schwenningen (DE) 1954-, active | https://www.jauch.com/ |
| JET | Jetkey Keyboard BIOS, inactive | |
| JVC | Japan Victor Corp. (JP) 1923-, active | |
| KBR | Kingbright (TW) 1980-, active | |
| Kemet | Kemet, YAG 2020 6 | |
| KIA | Kia Semiconductor (CN), active | http://en.kiamos.cn/ |
| Koenig | König Electronic GmbH, Reichelsheim (DE), active | |
| KRP | KRP Power Source (UK), active | |
| KYO | Kyocera (JP), active | |
| LAT | Lattice (fabs EPS, UMC), active | |
| LEG | Legerity/Lucent, ZAR | |
| Lelon | Lelon Electronics Corp., Taichung (TW) 1976-, active | http://www.lelon.com.tw/en/ |
| LEM | LEM Holding, Fribourg (CH), active | http://www.lem.com |
| LG | LG Electronics (ROC) 1958-, active | |
| LIF | Littelfuse (including Wickmann), active | |
| LIN | Linfinity, MSE | |
| LIO | Lite-On Technology Corporation, Taipeh (TW), active | |
| LIP | Lineage Power, GE 2011 1 | |
| Loewe | Loewe 1923-2013, inactive | |
| LT | Linear Technology, AD 2017 6 | |
| LTX | Litronix, SIE 1977 | |
| LVO | Level-One, INT | |
| LXD | LXD Inc., Cleveland OH (US), active | |
| MAC | M/A-Com, TYC, HAR 2009 | |
| MAR | Marvell Technology Group (US) 1995-, active | |
| Marquardt | Marquardt 1925-, active | |
| MAT | Matsushita Electric (JP), active | |
| MAX | Maxim, AD 2021 8 | |
| MCH | Microchip, active | |
| MCI | Mini-Circuits (US), active | |
| MCR | Micronas, Freiburg (DE), TDK 2016 | |
| MeanWell | MEAN WELL Enterprises Co., Ltd. (TW) 1982-, active | |
| MEC | Mercury Electronic Industrial Co. Ltd (TW), active | https://www.mercury-crystal.com/#pcbanner/1 |
| MEG | MEG Transformatorenbau GmbH Waldau (DE) -2007, inactive | |
| Metz | Metz 1938-2014, inactive | |
| MEV | Mikroelektronikai Vállalat (HU) 1982-86, inactive | |
| MHS | Matra Harris, ATM | |
| MIC | Micrel, MCH 2015 5 | |
| MIM | Mitsumi Electric Co., Ltd (JP) 1956-, active | |
| Misumi | Misumi Electronic Corporation (TW) 1982-, active | https://www.misumi.com.tw/ |
| MIT | Mitsubishi Semiconductor (JP), REN 2003 only ICs excl DRAM | |
| ML | Micro Linear Corp, SIR 2006 | |
| MME | VEB Mikroelektronik „Karl Marx“ Erfurt, inactive | |
| MMI | Monolithic Microdevices Inc, AMD 1987 | |
| MNX | Macronix (TW), active | |
| Molex | Molex, active | |
| MOS | MOS Technology 1969-76, Commodore 1976 9 | |
| MOT | Motorola Semiconductor, ONS 1999, FRE 2004 | |
| MOV | Mosel Vitelic (TW) 1985-2009, inactive | |
| MPS | Monolithic Power Systems, Inc, San Jose (US), active | https://www.monolithicpower.com/ |
| MSC | MSC, Stutensee (DE), inactive | |
| MSE | Microsemi, MCH 2018 5 | |
| MTE | Micron Technology Inc., active | |
| MTK | Mostek, UTC 1979, Thomson 1985 | |
| MTL | Mitel, ZAR 2001 | |
| MUL | Mullard, PHI 1927 | |
| MUR | Murata (JP), active | |
| MUS | Music Semiconductor 1992-2002, MTE 2002 | |
| NCC | Nippon Chemi-Con (JP), active | |
| NDK | Nihon Denpa Kogyo (JP), active | |
| NEC | Nippon Electric Corp (JP), active | |
| NECTokin | NEC Tokin Corporation, Shiroishi (JP), Kemet 2017 4 | |
| Neosid | Neosid Pemetzrieder GmbH & Co. KG 1933-, active | https://neosid.de/ |
| NEX | Nex Flash, WIN 2005 6 | |
| NEXP | Nexperia, Nijmegen (NL), active | http://www.nexperia.com |
| NIC | NIC Components Corp (US), active | |
| NIN | Nichicon Corporation (JP), active | |
| NJR | New Japan Radio Corp (JP), active | |
| Nordmende | Nordmende 1923-1977, Thomson 1977 | |
| NPC | Nippon Precision Circuits / Seiko NPC Corporation, active | https://www.npc.co.jp/en/ |
| NSC | National Semiconductor Corp, TI 2011 9 | |
| NUV | Nuvoton Technology, Hsinchu (TW), spin-off WIN 2008-, active | |
| NVE | NVE Corporation, Eden Prairie MN (US) 1989-, active | |
| NXP | NXP (discretes to NEXP), active | |
| OKI | Oki Semiconductor Co., Ltd. (JP), ROH 2008 (from 2011 as Lapis Semi) | |
| Omron | Omron (JP) 1933-, active | |
| ONS | On Semiconductor, active | |
| OPT | Optek Technology, TTE | |
| Orega | Orega, Electronique Et Mecanique, Courbevoie (FR), inactive | |
| ORI | Orion (JP), inactive | |
| OSR | Osram Opto Semiconductors GmbH, active | |
| PAN | Panasonic (JP), active | |
| PER | Pericom Semiconductor Corp. (fabs AMS, Chartered Semi, NJR), DII 2015 11 | |
| PGR | Peregrine Semiconductor (fab AKM) 1988-, MUR 2014 (fabs Magnachip, Lapis) | |
| PHI | Philips Semiconductors, NXP 2006 | |
| Phoenix | PHOENIX CONTACT Deutschland GmbH, Blomberg (DE), active | https://www.phoenixcontact.com/ |
| PIN | Power Integrations (fabs ATT, PAN, OKI), active | |
| PIO | Pioneer Corporation (JP), active | |
| PLE | Plessey Semiconductors, Cheney Manor / Roborough (UK), MTL 1998 | |
| PLX | PLX Technology, AVA | |
| PMC | PMC Components Pte Ltd Singapore, active | www.pmccomponents.com |
| PMI | Precision Monolithics, Inc., Santa Clara CA (US) 1969-1990, Bourns, AD 1990 08 | |
| PMS | PMC Sierra, MSE 2015 | |
| PON | Power-One (US), ABB, BelPower 2014 4 | |
| POP | Power Products / Computer Products, inactive | |
| PRF | Performance Semiconductor, PYR 2003 | |
| PRO | Protek Devices, Tempe AZ (US), active | http://www.protekdevices.com |
| ProStar | Pro Star Component Products Co., Ltd. (TW), active | http://dk8123.myweb.hinet.net/ |
| PSI | Paradise Systems Inc, inactive | |
| PTI | Powertip Technology Corporation (TW) 1991-, active | https://www.powertip.com.tw/ |
| PULSE | Pulse Electronics (US), YAG 2018 | |
| PYR | Pyramid Semiconductor, Sunnyvale CA (US), active | https://www.pyramidsemiconductor.com/ |
| QLC | Qualcomm, active | |
| QRVO | Qorvo, Greensboro NC (US) 2015-, active | https://www.qorvo.com/ |
| QTC | Quality Tech, FSC | |
| Quectel | Quectel Wireless Solutions Co., Ltd. (CN), active | https://www.quectel.com/ |
| Rafi | Rafi GmbH & Co. KG, Berg (DE) 1900-, active | https://www.rafi-group.com/en/ |
| RAM | Ramtron (fabs FUJ, TI, IBM/Nippon Steel Semiconductor for DRAM, ROH), CYP 2015 8 | |
| RAY | Raytheon, FSC 1997 | |
| RCA | Radio Corp of America, inactive | |
| REC | Recom Power GmbH, Gmunden (AT) 1974-, active | https://recom-power.com/ |
| REI | R&E International, Inc., MCH 2009 03 | |
| REN | Renesas (JP) 2010-, active | |
| RFM | RF Micro Devices Inc (RFMD), QRVO 2015 with TriQuint | |
| RFP | RF Prime Corporation, inactive | |
| RFT | Radio Funkwerke, inactive | |
| RLT | Realtek (TW), active | |
| ROC | Rockwell, CON 1998 | |
| Rocktech | Rocktech Displays Ltd., Shenzhen (CN), active | http://www.rocktech.com.hk |
| ROH | Rohm (JP), active | |
| RUS | all Russian MFR | |
| Saba | SABA (Schwarzwälder Apparate-Bau-Anstalt August Schwer Söhne GmbH) 1923-1980, inactive | |
| SAK | Sanken Electric Co. Ltd. (JP), active | |
| Salcomp | Salcomp Oyj, Salo (FI), 1975-, shareholder Nokia, active | https://salcomp.com/ |
| SAM | Samsung (ROC), active | |
| Sampo | Sampo Corporation, Taoyuan (TW), active | https://en.sampo.com.tw/ |
| Samtec | Samtec (US), active | |
| Samwha | Samwha (ROC), active | |
| SAN | Sanyo Semiconductor (JP), ONS 2011 1 | |
| SanHua | SanHua Holding Group (CN), active | https://www.sanhuagroup.com/en/ |
| SCE | Scenix Semiconductor 1996-, Ubicom 2000 11, QLC 2012 3 | |
| Schneider | Schneider Technologies AG, Türkheim (DE), 1859-2002 | |
| SchneiderEl | Schneider Electric SE (FR), active | |
| Schrack | Schrack AG (AT) 1920-, active | |
| Schurter | Schurter, Luzern (CH), active | |
| SCI | SCI Parts (TW), active | https://www.sci.com.tw/ |
| SCPI | S.C. Precision Industrial Co., Ltd., New Taipei City (TW), active | http://www.scpre.com.tw |
| SDG | Shindengen (JP), active | |
| Seagate | Seagate Microelectronics Limited, Livingstone (UK), inactive | |
| SEI | Seiko Instruments (JP), active | |
| SEM | Semikron Danfoss Elektronik GmbH & Co. KG, Nürnberg (DE), active | https://www.semikron-danfoss.com/de.html |
| SES | Sesco, SGS | |
| SGE | Silicon General Ltd., Leatherhead (UK), LIN | |
| SGS | SGS Thomson, STM | |
| SHA | Sharp Corp. (JP), active | |
| ShekouJewel | Shekou Jewel Electronic Company, Ltd. (CN), active | http://www.szjewel.com |
| Siba | SIBA GmbH, Lünen (DE), active | http://www.siba.de |
| SIE | Siemens, INF (semiconductor only) | |
| SIG | Signetics, PHI 1975/91 | |
| SIL | Siliconix, VIS 1998 2005 | |
| SIR | Sirenza Microdevices, RFM 2007 10 | |
| SKY | Skyworks Solutions, Inc., active | |
| SMA | Smartec B.V., Breda (NL), active | https://smartec-sensors.eu/cms/ |
| SMC | SMC Networks, Inc., Irvine CA (US), active | |
| SMSC | Standard Microsystems Corporation, MCH 2012 8 | |
| SMT | Semtech Corporation (US), active | https://www.semtech.com/ |
| SON | Sony / Sony Semiconductor (JP), active | |
| Soshin | Soshin Electric Co., Ltd. (JP), active | |
| SPAN | Spansion, CYP 2014 12 | |
| SPR | Sprague, VIS | |
| SPT | Signal Processing Technologies (fab Toko) 1983-, FSC 2002 | |
| SPX | Sipex, EXR 2007 | |
| SST | Silicon Storage Technology, Inc. (UK), MCH 2010 1 | |
| STA | Stanford Telecom, INT 1999 | |
| STM | ST Microelectronics, active | |
| SUMI | Sumitomo Electric Industries Ltd (JP) 1897- incl. SEI INTERCONNECT PRODUCTS (EUROPE) LTD. | https://www.sumi-electric.eu |
| Syko | SYKO Gesellschaft für Leistungselektronik mbH 1973-, active | https://www.syko-power.de/ |
| SYN | Synertek 1973-1985, HON 1979 | |
| TAG | Transistor AG, Zürich (CH), inactive | |
| TAM | Tamura Corporation (JP), active | http://www.tamuracorp.com |
| TDK | Tokyo Denki Kagaku (JP), active | |
| TDY | Teledyne, active | |
| Teapo | Teapo Luxon (TW), active | |
| TEC | Teccor, LIF | |
| TEL | Telcom Semiconductor (fab IC Works), MCH 2000 10 | |
| TEM | Temic, ATM | |
| Tensai | Tensai International AG (CH) 1980-2023, inactive | |
| Termal | Termal Elektronik (TR), active | |
| TES | Tesla, Praha (CZ), active | |
| TEWA | Fabryka Półprzewodników Tewa (PL) 1958-1970, inactive | |
| TFK | Telefunken, TEM | |
| Thomson | Thomson Semiconducteurs (FR), SGS | |
| TI | Texas Instruments (US), active | |
| Tianma | TIANMA Microelectronics Co., Ltd. (CN) 1983-, active, including NLT | https://www.tianma.eu/ |
| TOS | Toshiba (JP), active | |
| TOY | Toyo LED Electronics Ltd. (HKG), active | https://www.toyo-led.com |
| TQG | Tele Quarz Group (Bernd Neubig), AXTAL GmbH & Co. KG 2003 | https://www.axtal.com/ |
| TRA | Transitron Electronic Corp. (US, David and Leo Bakalar) 1952-1977, Holding -1986, inactive | |
| Traco | TRACO Electronic AG, Baar (CH), active | https://www.tracopower.com |
| TRI | Trident Microsystems 1987-2012 | |
| Tristar | TriStar Electronics Corp. (US) 1957-, active | |
| TSC | Taiwan Semiconductor Co. LTD, active | https://www.taiwansemi.com/ |
| TSL | TSL Flyback Transformer | |
| TTE | TT Electronics (Welwyn, IRC, BI technologies), active | |
| TUR | Turbo IC, Inc, San Jose CA (US), inactive | |
| TYC | Tyco (TE Connectivity, incl Raychem), active | |
| TYU | Taiyo Yuden Co., Ltd. (JP), active | |
| UMA | UMA electronic productions GmbH, Tegernheim (DE), active | http://www.uma-online.de |
| UMC | United Microelectronics Corp., Hsinchu (TW) 1980-, active | https://www.umc.com/en/ |
| UMEC | Universal Microelectronics Co., Ltd. ,Taichung (TW), active | http://www.umec.com.tw |
| UNI | Unitrode, Merrimack NH (US) 1960-, TI 1999 | |
| UNITRA | Unitra, inactive | |
| Universum | Universum | |
| UTC | Unisonic Technologies Co., Ltd. (TW), active | http://www.unisonic.com.tw/english |
| VAL | Valvo (Philips Unternehmensbereich Bauelemente) 1924-1989, PHI 1989 | |
| VAN | Vanguard International Semiconductor (TW) 1994-, active | https://www.vis.com.tw/ |
| VAT | Vantis, AMD, LAT 1999 | |
| Videoton | Videoton Holding (HU) 1938-, active | https://www.videoton.hu/ |
| VIS | Vishay (incl Dale, Draloric), active | |
| Vision | Vision Video Heads (JP), inactive | |
| VIT | Vitesse, MSE 2015 6 | |
| Vivanco | Vivanco Gruppe AG 1920-, seit 2011 Hauptaktionär Xupu Electronics Technology GmbH, active | https://vivanco.com/ |
| Vogt | Vogt, seit 2009 Hauptaktionär Sumida, active | |
| VOT | Votrax,Troy MI (US), inactive | |
| VTM | Vitrohm, Pinneberg (DE), YAG 1996 | |
| W+P | W+P PRODUCTS GmbH, Bünde (DE), active | https://wppro.com/ |
| Wago | WAGO Kontakttechnik GmbH (nach Schweizer Recht) & Co. KG, Minden (DE), active | http://www.wago.com |
| WEC | Wing Shing Electronics Co. (CN), active | http://www.wingshing.com/en |
| Weitronic | Weitronic Enterprise Co., Ltd., New Taipei City (TW), active | http://www.weitronictw.com.tw/ |
| Wima | WIMA Wilhelm Westermann GmbH & Co. KG 1948-, active | |
| WIN | Winbond Electronics Corporation (TW) 1987-, active | |
| WOL | Wolfson Microelectronics plc (UK) 1984-, CIR 2014 8 | |
| WSI | Waferscale Integration (fabs SHA, NSC, AMD, AMI), STM 2000 9 | |
| Wuerth | Würth Elektronik eiSos GmbH & Co. KG 1971-, active | |
| XIC | Xicor, ITS 2004 3 | |
| XIL | Xilinx (fabs EPS, YAM, IC Works), AMD 2022 2 | |
| YAG | Yageo Corporation (TW), active | https://www.yageo.com/en/Home |
| YAM | Yamaha (Kagoshima Semiconductor), 1987-, active, subcontracted to Phenitec Semiconductor 2015 10 | |
| ZAR | Zarlink, MSE 2011 10 | |
| ZIL | Zilog, Exxon 1980, IXS 2010 3 | |
| ZMD | Zentrum für Mikroelektronik Dresden, IDT 2015 12 | |
| ZTX | Zetex, DII 2008 |