CompanyAbout SSO
About SSO
Solid State Optronics is a pioneer in optically isolated solid state switching devices. Since 1982, our award-winning products have brought unprecedented performance and integration to a wide range of industries and applications.

Our story
Founded in 1982 in San Jose, the capital of Silicon Valley.
Building on earlier advances in solid state technology and semiconductor fabrication, SSO developed proprietary, patented technologies in Solid State Relay (SSR) designs. At its inception, at a time when competitors were touting reduction of complexity down to 13 discrete components, SSO’s only had 5 — making the SSR easier to assemble, while improving reliability and cost.
R&D is a continuous process at SSO and is part of our company’s DNA. This spirit guides our product development today.
SSO made the SSR easier to assemble, improving reliability and cost.
SSO was the first company to offer over-current protection in miniature 4pin SOP, garnering it a Product of the Year Award when introduced. Our linear optocouplers offer the most accurate servo to feedback ratio (ΔK3) in the industry.
- Founded in San Jose
- 1982
- Optically isolated devices
- 250+
- Components in our first SSR
- 5
- Highest isolation voltage
- 5000 Vrms
Innovation & broad product offering
Looking forward, we seek to preserve our pioneering soul while pursuing continued growth—assuring Customers of our past and our commitment to the future. While SSO’s innovations in Solid State Relays continue unabated we have also expanded our product offering to over 250 devices, including many other optically isolated switching devices.
Experience and technical support
Our extensive industry experience allows us to provide intelligent and honest technical support. In our over 40 years of operations, we’ve helped numerous Customers, Researchers and Product Developers find the right optically isolated switching solution, whether in our standard product line, or by offering devices tailored to their needs.