Sierra Circuits Sierra Circuits (also known as Sierra Proto Express) is a company that manufactures and assembles printed circuit boards. | ![]() Schweizer Electronic Schweizer Electronic is a company that manufactures printed circuit boards (PCBs). | ![]() Advanced Circuits Advanced Circuits (also known as AdvancedPCB, 4PCB) is a company that provides printed circuit board manufacturing and assembly solutions. | ![]() AdvancedPCB AdvancedPCB (also known as APCT) is a company that manufactures printed circuit boards (PCBs). | |
Founding Date | Founding Date 1986 | Founding Date 1849 | Founding Date 1989 | Founding Date 1977 |
Type | Type Private | Type Public | Type Subsidiary | Type Private |
Tags | ||||
Locations | Locations Sunnyvale, US HQ Delta, CA | Locations Schramberg, DE HQ Changzhou, CN Suzhou, CN Singapore, SG Wilmington, US | Locations Aurora, US HQ Chandler, US Maple Grove, US Orange, US Placentia, US Santa Clara, US | Locations Aurora, US HQ Chandler, US Maple Grove, US Orange, US Placentia, US Santa Clara, US |
Employees | Employees 478 | Employees 5043% decrease | Employees 1762% decrease | Employees 750 |
Financial | ||||
Revenue (est.) | Revenue (est.) $108m (Y, 2024) | Revenue (est.) €173.1m (FY, 2025) | Revenue (est.) $89.5m (FY, 2022) | Revenue (est.) N/A |
Gross profit | Gross profit N/A | Gross profit €17.6m (FY, 2025) | Gross profit $41.1m (FY, 2022) | Gross profit N/A |
Operating ⚠ | ||||
Capabilities | Capabilities 7 (Jun, 2024) | Capabilities N/A | Capabilities 11 (May, 2024) | Capabilities N/A |
Certifications and Compliance | Certifications and Compliance 10 (Jun, 2024) | Certifications and Compliance N/A | Certifications and Compliance 16 (May, 2024) | Certifications and Compliance N/A |
Industries Served | Industries Served 8 (Jun, 2024) | Industries Served 4 (FY, 2022) | Industries Served N/A | Industries Served 5 (May, 2024) |
Manufacturing Space, sq. ft. | Manufacturing Space, sq. ft. 70 k (Jun, 2024) | Manufacturing Space, sq. ft. N/A | Manufacturing Space, sq. ft. N/A | Manufacturing Space, sq. ft. 390 k (May, 2024) |

Schweizer Electronic is a company that manufactures printed circuit boards (PCBs).
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Advanced Circuits (also known as AdvancedPCB, 4PCB) is a company that provides printed circuit board manufacturing and assembly solutions.
View company
AdvancedPCB (also known as APCT) is a company that manufactures printed circuit boards (PCBs).
View company