Electrical Components Manufacturers
Sierra Circuits
1108 W Evelyn Ave, Sunnyvale, CA 94086, United States
- Contract manufacturer / job shop
- Founded 1986
- ISO 9001:2015, ISO 13485:2016
About Sierra Circuits
Founded in 1986 in Sunnyvale, California, Sierra Circuits has specialized in American-made printed circuit board prototypes and assemblies. The company operates from its Silicon Valley headquarters, emphasizing domestic production from fabrication through assembly. Sierra Circuits provides PCB fabrication, assembly, and component procurement as a turnkey service. Its capabilities span rigid, flex, and rigid‑flex boards, high‑density interconnect (HDI), and aerospace/mil‑spec designs up to 30 layers. The facility handles board thicknesses down to 0.010 inch, copper weights up to 6 oz, and trace/space geometries as fine as 1.5 mil. In‑house assembly meets IPC‑A‑610 Class 2 standards, and a dedicated CAM engineer supports each advanced project with stack‑up assistance. The company serves aerospace and defense, automotive, healthcare and medical devices, consumer and wearable electronics, universities and research institutions, and industrial manufacturing. Customers range from quick‑turn prototype orders to higher‑volume production runs. Sierra Circuits differentiates itself with a “Zero Defect Guarantee,” a commitment to 100 % U.S. manufacturing, and same‑day turnaround availability for advanced designs. The firm also highlights personalized stack‑up assistance, component supply‑chain visibility, and in‑house assembly at scale as core advantages.
Manufacturing capabilities
Core processes
Industries served
- Aerospace & Defense
- Automotive
- Healthcare & Medical Devices
- Consumer & Wearable Electronics
- Universities & Research Institutions
- Industrial Manufacturing
Materials
FR-4 (lead-free, FR4-06, high-temp) · Rogers · Polyimide · Aluminum Clad · Metal Core · High-speed materials · ENIG · HASL (leaded and lead-free) · Electrolytic Hard Gold · Electrolytic Soft Gold · Selective Gold · Immersion Silver · OSP (Shikoku F2) · OSP (Entek)
Company details
- Location
- Sunnyvale, California
- Company type
- Contract manufacturer / job shop
- Founded
- 1986
- Lead time
- As fast as 5 days for fully assembled PCBs; same-day available for advanced PCBs; standard turn times 1–10 business days
- Tolerances
- Minimum trace/space 1.5 mil (0.0015 in)
- Certifications
- ISO 9001:2015, ISO 13485:2016, IPC-6012 Class 1, 2, 3, 3D, IPC-6013 Class 1, 2, 3, MIL-PRF-31032, MIL-PRF-55110
Frequently asked questions
Where is Sierra Circuits located?
Sierra Circuits is located at 1108 W Evelyn Ave, Sunnyvale, CA 94086, United States.
What does Sierra Circuits do?
Sierra Circuits is listed under Electrical Components Manufacturers, and its listed capabilities and products include PCB fabrication (rigid, flex, rigid-flex), HDI (high-density interconnect) fabrication, Aerospace and military-spec PCB fabrication, PCB assembly (IPC-A-610 Class 2), Component procurement and supply chain management and Turnkey PCB assembly (fabrication, procurement, assembly).
What industries does Sierra Circuits serve?
Sierra Circuits lists Aerospace & Defense, Automotive, Healthcare & Medical Devices, Consumer & Wearable Electronics and Universities & Research Institutions among the industries it serves.
What certifications does Sierra Circuits have?
Certifications on file for Sierra Circuits: ISO 9001:2015, ISO 13485:2016, IPC-6012 Class 1, 2, 3, 3D, IPC-6013 Class 1, 2, 3 and MIL-PRF-31032.
When was Sierra Circuits founded?
Sierra Circuits was founded in 1986.
How do I request a quote from Sierra Circuits?
Use the Request a quote button on this page to send Sierra Circuits your requirements through FirmsLedger, or call (408) 735-7137 and visit protoexpress.com.
What companies are similar to Sierra Circuits?
Other Electrical Components Manufacturers in California listed on FirmsLedger include Heilind Electronics Inc, Yun Industrial Co Ltd and Accurate Electronics.