Sierra Circuits

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1108 W Evelyn Ave
Sunnyvale, CA 94086
+1 (408) 735-7137
https://www.protoexpress.com

Sierra Proto Express, based in Sunnyvale, CA, is a leading provider of PCB fabrication, assembly, and components. With over 35 years of experience, they have established a reputation for excellence in prototype manufacturing, optimization, and assembly. Their advanced technology and dedicated CAM engineers allow them to fabricate complex PCBs that others may not attempt, catering to industries such as aerospace, defense, automotive, healthcare, and more.

Sierra Proto Express offers a range of services, including standard PCB fabrication, turnkey PRO solutions, and advanced PCBs with stack-up assistance. They provide quick-turn options with fast turnaround times, as well as a variety of materials and finishes to meet specific requirements. Committed to quality, Sierra Proto Express adheres to industry standards and certifications, ensuring reliable and high-quality PCBs for their customers.

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Reviews

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2.07 reviews
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Karl G.
10/11/2022

Great order entry software - keeping you apprised of any issues with parts availability and design issues. The end product is fabricated well and assembly is done with precision and skill....

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Chris N.
12/2/2025

We approved a job with a 7-day turn three weeks ago, and we're still waiting. Would not recommend.

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Lilly R.
1/9/2024

Poor management and product. Would not recommend this company. Unreliable and bad service.

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Harry L.
4/26/2024

Poor communication. I'm still waiting for Pradeep Ambrish to respond to emails. I don't understand how this comapny generates revenue.

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Stephan F.
6/6/2023

I wish I could provide a better rating. We provided a simple PCB board design for an audio capture device. They delivered a product that did not work as it was poorly manufactured. We brought in...

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