A
- Antenova
- American Technical Ceramics (ATC)
- API Technologies_Spectrum Control
- API Delevan
- Artesyn Embedded Technologies
- Astrodyne TDI
- APM HEXSEAL
- Applied Motion
- Aries Electronics
- Amulet Technologies
- Apex Tool Group
- Anderson Power Products
- Axiomtek
- Avery Dennison
- Auvidea
- AVX
- Aptiv (formerly Delphi)
- Arduino
- Arbor Technology
- Altitude Technology
- Arcol_Ohmite
- Analog Devices
- Analog Devices_Hittite
- Analog Devices_Linear Technology
- Apex Tool Group_Weller
- Ault_SL Power
- Atmel_Microchip Technology
- Amphenol Commercial Products
- Altera_Intel
- AVX Connectors
- ADDA
- Advanced Energy
- ABRACON
- Adafruit
- AIM
- Advanced Semiconductor
- AIM-Cambridge - Cinch Connectivity Solutions
- AirBorn
- Advanced Thermal Solutions
- ADLINK Technology
- Advanced Linear Devices
- Adesto Technologies
- Advantech
- Active-Semi
- aconno
- ACEINNA
- ABLIC
- ABB Embedded Power
- AB Connectors_TT Electronics
- Aavid
- AAEON UP
- Afero
- Aeroflex - Metelics (MACOM)
- Alliance Memory
- Alpha (Taiwan)
- Alpha Wire
- ALPS Electric
- Altech
- Alorium Technology
- AMPROBE
- ams
- AMSECO
- Apacer
- Anaren
- Apem
- Ametherm