Make / PCB fabrication / Sierra Circuits (ProtoExpress)
Sierra Circuits (ProtoExpress)
Factory: Silicon Valley quick-turn PCB fab and turnkey assembly with online instant quotes for standard and Turnkey PRO boards.
US Sunnyvale, California, United States · protoexpress.com
What they make
| Processes | PCB fabrication, Flex PCB, PCB assembly (PCBA), Electronics design, Testing & certification |
|---|---|
| Capabilities | Turnkey PRO (fab + parts + assembly), standard rigid PCBs, advanced PCBs with dedicated CAM engineer, component sourcing, flying probe test, design support. |
| Parts and products | prototype PCBs, assembled boards |
| Materials | unknown |
| Tolerance | unknown |
| Largest part | unknown |
Order size and timing
| Minimum order | unknown |
|---|---|
| Prototypes | yes |
| Small-run evidence | "Quick-turn Rigid PCB prototypes" https://www.protoexpress.com/ |
| Startup friendly | unknown |
| Quote turnaround | instant online (Turnkey PRO, Standard) |
| Prototype lead time | standard PCBs 1-10 business days, 24-hour available; assembled as fast as 5 days |
| Production lead time | advanced PCBs same day to 4 weeks |
| Instant online quote | yes |
Quality and company
| Certificates | AS9100D, ISO 9001:2015, ISO 13485:2016, IPC-6012 Class 2/3, UL, MIL-PRF-31032, ITAR registered |
|---|---|
| Business type | factory |
| People | unknown |
| Floor area | unknown |
| Founded | unknown |
| English | yes |
| Public customers | unknown |
| Address | 1108 West Evelyn Avenue, Sunnyvale, CA 94086, USA |
| Marketplace stores | unknown |
Contact
| not public; request through Maglev | |
| Phone | +1 (800) 763-7503 |
| Printed at | protoexpress.com |
Caveat
Directory already has 'Sierra Circuits Asia' (Guangzhou) — this is the separate US Sunnyvale entity; check for overlap.
Sources
- protoexpress.com · services, address, lead times, certifications, phone
Confidence VERIFIED · from public sources, not yet visited or ordered from · checked 2026-10-30