- I-CUBE
- IAR Systems
- IBM
- IC Microsystems
- iC-Haus
- ICC (International Components Corporation)
- ICE Components
- IceMos Technology
- ICM Corporation
- ICS (Integrated Circuit Systems)
- ICSensors
- ICSI (Integrated Circuit Solution, Inc.)
- ICT
- IDEA (Instrument Design Engineering Associates)
- Ideal Industries
- Ideal Power
- IDEC Corporation
- IDI (Interconnect Devices, Inc.)
- IDT (Integrated Device Technology)
- IEE (Industrial Electronic Engineers)
- IET Labs
- IK Semicon
- IK Semiconductor
- Illinois Capacitor
- Illumitex
- ILSI America
- ImageCraft Creations
- Imatronic
- IMI (International Microcircuits, Inc.)
- IMLEC (Inter-Market)
- IMP
- Impala Linear Corporation
- IMS Connector Systems
- INCON
- Industrial Fiber Optics
- Infineon Technologies
- InnovASIC
- Innovative Power Products
- Inova Semiconductors
- Inspired LED
- Instek
- Integral
- Intel Corporation
- Interfan
- InterFET Corporation
- International CMOS Technology
- International Power DC Power Supplies
- International Semiconductor
- Interpion Semiconductor
- Interpoint
- Intersema Sensoric
- Intersil
- Invac
- InvenSense
- Invensys Sensor Systems
- IP Semiconductor
- IPDiA
- IPI (Intronics Power, Inc.)
- IQD Frequency Products
- IR (International Rectifier)
- IR PCS (International Rectifier Power Control Syst
- IR PCS (International Rectifier Power Control Systems)
- IRC (International Resistive Company)
- Ironwood Electronics
- IRTOUCH SYSTEMS
- Isahaya Electronics Corporation
- ISC (Inchange Semiconductor Company)
- ISD (Information Storage Devices)
- Ishizuka Electronics
- ISI (Ideal Semiconductor, Inc.)
- ISI (Inductor Supply, Inc.)
- Iskra Semic Capacitors
- Isocom Components
- ISSI (Integrated Silicon Solution, Inc.)
- IST (Innovative Sensor Technology)
- ITC (Industrial Timer Company)
- ITE (Integrated Technology Express)
- ITF (Integrated Technology Future)
- ITT Cannon
- ITT Industries
- ITT Semiconductors
- ITW (Illinois Tool Works)
- ITW Switches
- IVO
- IXYS
- IXYS Integrated Circuits Division
- IXYS RF
