Support and Services

 Questions / Feedback / Customer Service Issue? Proceed / Read More

 Preparing/sending files for a quote or order Proceed / Read More

 Upload your gerber files and get a quote Proceed / Read More

Silicon Valley Office:

Sierra Circuits, Inc. (dba Sierra Proto Express)

1108 West Evelyn Ave

Sunnyvale, CA 94086


We are open Mon - Fri, 8AM PST to 5:30PM PST

Call us at (800)763-7503 or (408)735-7137

You can fax us at 408-735-1408

Upload design files for quote at

Customer Service:

Web PCBs


(mention your order number in the subject)

Phone: 800-763-7503

Customer Service Screen.

ITAR and Milspec Orders


(mention your order number in the subject)

Any Military, ITAR or Milspec Orders or Inquiries

No Touch Orders


(mention your order number in the subject)

Customer Service Screen.

Account Representative

Every customer, large or small, is assigned an Account Representative.

We are here to help in the order process, to answer any questions about our products, or find answers to your technical questions. Please contact us directly by dialing 1-800-763-7503 or contact us through our website. We will respond to you shortly.

Helpful Links to Remember

Customer Service

Upload your file to get Custom Quote

Sierra Manufacturing Capability

Search for your Order/Shipment

No Touch Product Page


Web PCB Assembly

High Density Interconnect (HDI)