Top 5 Electronics Manufacturers in Connecticut 2026
Last updated
FirmsLedger lists 5 electronics & semiconductor manufacturers headquartered in Connecticut. They are spread across 5 cities, including Cheshire, Milford, Putnam and Shelton.
By specialty, Connecticut has PCB manufacturing (2) and PCB assembly (2) listings.
| Company | City | Specialty | Phone | Website |
|---|---|---|---|---|
| AG Semiconductor Services, LLC. | Stamford | Contract remarketing services | (203) 322-5300 | agsemiconductor.com |
| Silicon Integration | Milford | PCB assembly (surface mount, mixed technology) | (203) 876-2844 | siliconint.com |
| Spectral Products | Putnam | Spectrometer manufacturing | (860) 928-5834 | spectralproducts.com |
| Comet Technologies USA Inc | Shelton | RF power supply for plasma process control | (203) 447-3200 | comet-group.com |
| Fujikin | Cheshire | — | (203) 699-2134 | fujikin.com |
All Electronics & Semiconductor in Connecticut

Spectral Products
Putnam, Connecticut
Spectral Products is headquartered in Putnam, Connecticut, with additional offices in Albuquerque, New Mexico, and Seoul, South Korea. The company's founding year and ownership structure are not publicly disclosed.
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