- A&O [Alpha & Omega Semiconductor] [AOS]
- ACM Inc. (Action Components and Modules Inc.)
- Alpha & Omega Semiconductor [AOS] [A&O]
- Alps Alpine Co., Ltd.
- Amazing Microelectronic Corp. ESD protection
- Amotech Corporation
- ANOVA Technologies Co., Ltd. TVS, Zener & Rectifier diodes
- AOS [Alpha & Omega Semiconductor] [A&O]
- KYOCERA AVX Components Corporation
- Bourns, Inc.
- BrightKing surge protection
• acquired by YAGEO Corporation
- BYD Microelectronics [BYD Company Limited]
- Cheng-Yi Electroni Co.
- Coil-Master Co. Ltd
- Concord Semiconductor Corp.
• acquired by Littelfuse Inc.
- Coolisys Technologies Inc. RF components
- Cooper Bussmann Inc.
- Corry [Quantic Corry] EMI & RF filters
- Crydom Corporation
• a member of Custom Sensors & Technologies [CST]
- Dean Technology, Inc. high voltage silicon carbide varistors, supressors
- ECI [Quantic ECI] electromagnetic components
- Elite Semiconductor Products
- Fairchild
• Fairchild Semiconductor International Inc. acquired by ON Semiconductor
- Fultec Semiconductor Inc. circuit protection
• Transient Blocking Unit (TBU) business acquired by Bourns, Inc.
- General Semiconductor
• acquired by Vishay Intertechnology Inc.
- Goodwork Semiconductor Co., Ltd.
- G.P.S. Green Power Semiconductors SpA
• now GPS Green Power Solutions Srl
- GPS Green Power Solutions Srl
- Guangdong Shikueswei Industrial Co., Ltd. [Shikues] diodes, TVS, schottky rectifier, transistors, MOSFETs, voltage regulators
- Infinex [owned by Flex Ltd.]
- INPAQ Technology Co., Ltd.
• a member of PSA [Passive System Alliance]
- ITG Electronics, Inc.
- Jensen Devices AB gas discharge tubes
• acquired by Bourns, Inc.
- Jinan Jifu Semiconductor Co., Ltd.
- Joslyn Electronic System Company
• Joslyn Electronic System Company
- Littlefuse
- Karson Technology Limited
- KEKO VARICON varistors, varicons
• acquired by Bourns, Inc.
- Knowles Corporation
- MCC [Micro Commercial Components Corporation]
- Microphase Corporation RF components
- Microsemi
• Microsemi Corporation acquired by Microchip Technology Inc.
- NXP Semiconductors
- Okaya Electric Industries Co., Ltd.
- Panasonic Japan
• Chip Tantalum Capacitor Unit acquired by Nichicon
- Panasonic Semiconductor Solutions Co., Ltd. [PSCS]
• Diode and Transistor Business Line acquired by Rohm Semiconductor Inc.
• SOC Business Line acquired by Socionext Inc.
• Panasonic Semiconductor Solutions Co., Ltd. acquired by Nuvoton Technology Corporation
- Panjit
- Passive System Alliance [PSA]
- Philips Semiconductor
• now NXP Semiconductors
- Polovodice a.s. diodes, suppressors, thyristors
• semiconductor business acquired by ABB
- Power Innovations
- ProTek
- PSA [Passive System Alliance]
- Quantic Corry [Corry] EMI & RF filters
- Quantic ECI [ECI] electromagnetic components
- Raychem Circuit Protection
• a unit of Tyco Electronics [now TE Connectivity]
- RELPOL S.A.
- Sangdest Microelectronic (Nanjing) Co., Ltd. [SMC Diode Solutions Co., Ltd.]
- Sankosha Co. Ltd solid-state surge protection device (SSPD), ceramic arrester (Gas Discharge Tubes )
• check Sankosha USA too!
- SEI [Stackpole Electronics, Inc.]
- seMitec
- Semitron
• acquired by Crydom Corporation • a member of Custom Sensors & Technologies [CST]
- Semtech
- Shanghai WillSemi [WillSemi]
- Shenzhen Yangjingwei Electronics Co., Ltd. diodes, transistors, scr, mosfets
- Shikues [Guangdong Shikueswei Industrial Co., Ltd.] diodes, TVS, schottky rectifier, transistors, MOSFETs, voltage regulators
- Silicon Transistor Corp. [STC] transistors, TVS
• acquired by NES [New England Semiconductor] • acquired by Microsemi
• Microsemi Corporation acquired by Microchip Technology Inc.
- SMC Diode Solutions Co., Ltd. [Sangdest Microelectronic (Nanjing) Co., Ltd.]
- Stackpole Electronics, Inc. [SEI]
- STMicroelectronics
- Streamline Avionics Inc. EMI filters
- Surge Components
- Sussex Semiconductor
- Syfer Technology Limited
• acquired by Dielectric Laboratories [DLI] • Dielectric Laboratories is owned by Knowles Corporation
- SynSemi Inc.
- Taitron Components
- TE Connectivity
• circuit protection business unit acquired by Littlefuse Inc.
- Teccor
• acquired by Littelfuse Inc.
- Tecdia Inc. capacitors, varactors
- Transys Electronics
- Tyco Electronics [now TE Connectivity]
- uPI Semiconductors Corporation MOSFETs, TVS, sensors, DC/DC converters, LED drivers
- Voltronics Corporation
• acquired by Dielectric Laboratories [DLI] • Dielectric Laboratories is owned by Knowles Corporation
- Walsin Technology Corporation
- WillSemi [Shanghai WillSemi] surge protection, LED drivers
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