- Baknor Electronics
- Barantec, Inc.
- Barker Microfarads, Inc.
- Batron GmbH
- Beau Interconnect
- Belden Wire & Cable
- Bel Fuse
- Bell Technologies, Inc.
- Benchmarq
- Berg Electronics
- Bergquist Company
- Best Windings Ltd.
- Betatronix, Inc.
- BG Labs, Inc.
- BH Electronics
- Bicron Electronics Co.
- BI Technologies
- Bivar
- BKC Semiconductor
- Bliley Electric Co.
- Bomar Crystal Co.
- Bourns
- Broadband Communications Product, Inc.
- Brooktree
- BrownDog Prototypes
- Buckeye ShapeForm
- Bud Industries
- Burndy
- Burr-Brown
- Bussmann/Cooper Ind.
- Butterfly DSP
