Since 1986, Sierra Circuits has been a leading supplier of high technology, quick-turn Printed Circuit Boards. ISO-9001:2000 and MilSpec certified, Silicon Valley based company.
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Service & Support

Questions / Feedback / Customer Service Issue?  [Click here]
Forgot your login ID and/or password?  [Click here]
Preparing/sending files for a quote or order  [Click here]
Service & Support General Information
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

To send your design files for a quote go to
www.protoexpress.com/customquote

Silicon Valley Office:
Sierra Proto Express
1108 West Evelyn Ave
Sunnyvale, CA 94086
Phone: 408-735-7137

Atlanta (East Coast) Office:
Sierra East
105, Green Castle Road
Suite D
Tyrone, GA 30290
Phone: 678-870-1700


Call and speak to a Personal
Service Representative about
your order, products and more
1-800-763-7503 x 500
Customer Service for Standard, Full Service Orders
EMAIL: (mention your order number in the subject)
Phone: 800-763-7503
or use the Customer Service Screen.

Customer Service for No Touch Orders
EMAIL: (mention your order number in the subject)
or use the Customer Service Screen.

Customer Service for Military Work and Milspec Orders
EMAIL: (mention your order number in the subject)
Any Military Work and Milspec Orders or Inquiries email to


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.

Questions / Feedback / Customer Service Issue?  [Click here]
Forgot your login ID and/or password?  [Click here]
Preparing/sending files for a quote or order  [Click here]

Helpful Links to Remember
Customer Service: www.protoexpress.com/customerservice
Upload your file to get Custom Quote: www.protoexpress.com/customquote
Sierra Manufacturing Capability: www.protoexpress.com/capability
Search for your Order/Shipment: www.protoexpress.com/status
No Touch Product Page: www.protoexpress.com/notouch

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