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(800) 763.7503
About Sierra Circuits - Contact Us

Silicon Valley Office (HQ)
Sierra Circuits, Inc.
1108, West Evelyn Avenue
Sunnyvale, CA 94086

Toll free: 800-763-7503
Phone: 408-735-7137
Fax: 408-735-1408

Sunnyvale Office Timing:
8 AM to 5 PM Pacific Time, Mon-Fri
Local time in Pacific Timezone now is 2:53 PM
Map/Driving Directions
Customer Service
General Service Customer Service
Log a customer service ticket at www.protoexpress.com/customer-services
Phone: 800-763-7503 X 500
Web PCB Customer Service
Log a customer service ticket at www.protoexpress.com/customer-services
Phone: 800-763-7503
Email:
No Touch PCB Customer Service
Log a customer service ticket at www.protoexpress.com/customer-services
and do indicate that your issue is about No Touch.
Phone: 800-763-7503 X 9939 Wendy Garcia
Email: (mention your order number in the subject)
BetterDFM Customer Service
Email: (do mention your BetterDFM AFV# if available)
Customer Service for Military Work, ITAR OR Milspec Orders
For any Military Work and Milspec Orders or Inquiries, send email to