Transphorm Inc.: Detailed Company Information & Corporate Profile
Summary
Transphorm Inc., headquartered in Goleta, California, was founded in 2007 and operates as an independent chip manufacturing firm. With a workforce of 100‑200 employees and annual revenue between $5 M and $25 M, the company specializes in gallium nitride (GaN) semiconductor technologies for power conversion. The core product portfolio includes 650V GaN devices, cascode GaN FETs, and JEDEC‑qualified components that deliver high efficiency for demanding power applications. These offerings leverage Transphorm’s expertise in advanced GaN fabrication and power management solutions. A broad leadership team underpins the company’s technical and operational strengths: roles span sales support, test laboratory management, accounting, sustaining engineering, production, materials and device engineering, process R&D, and systems administration. This multidisciplinary structure supports continuous innovation within the California Metropolitan area and beyond.
| Transphorm Inc. Website | renesas.com |
| Social Links |    |
| Phone Number | 805-456-1300 |
| Industries | |
| Transphorm Inc. Headquarters Address | 75 Castilian Drive, Goleta, California, 93117 US |
| Company Size | 100-200 employees |
| Specialities & Services | GaN, semiconductor, gallium nitride, power conversion, 650V GaN, JEDEC qualification, cascode GaN FET |
| SIC Code | 3674 |
| NAICS Code | 334413 Semiconductor and Related Device Manufacturing |
| DMA Code | Ca Metropolitan Area |
| Founded | 2007 |
| Estimated Annual Revenue | $5.0M - 25M |
| Operating Status | Independent Company |
| Updated: | 2026-09-20 |
Competitors
Name | Founded | Type | Employees |
|---|---|---|---|
| 2008 | Privately Held | 25 - 100 | |
| 2014 | Privately Held | 25 - 100 | |
| 1987 | Public Company | 1.0K - 5.0K | |
| 1998 | Privately Held | 25 - 100 |
Subsidiaries and Affiliated Companies
Estimated Website Traffic
The chart shows a decline in traffic to the renesas.com website. In August, traffic decreased to 379678, compared to 407606 in the previous month. The highest traffic in 2026 was recorded in March, reaching 667231 visits.
Workforce Turnover
Length of Employment
Transphorm Inc.'s workforce includes employees across a wide range of tenure levels.
12% have been with the company for 3 to 4 years12% have been with the company for 5 to 7 years12% have been with the company for 8 to 10 years65% have been with the company for more than 11 years
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Transphorm Inc. Corporate Information: FAQ
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