box build assemblies

EI offers a wide range of box build services including full electromechanical assembly, installation of sub-assemblies and components, installation and routing of cables and wire harnesses and final product packaging.

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Electromechanical Assembly

We integrate mechanical and electronic components into complete, functional systems with precision and quality control at every step.

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Sub Assemblies & Components

Our team expertly assembles and installs sub-systems and individual components to streamline your full product integration.

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Installation / Routing of Cables

We provide clean, organized cable routing that enhances product performance, durability, and ease of maintenance.

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Installation / Routing of Wire Harnesses

Our technicians install and route wire harnesses with care and consistency to ensure signal integrity and long-term reliability.

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functional testing

EI can develop and perform comprehensive functional testing on both PCB assemblies and full box builds to ensure complete system performance before shipment.

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Final Product Packaging

We deliver finished box builds in professional, secure packaging—ready for shipment, deployment, or direct-to-customer delivery.

certified excellence you can trust

Partner with EI Microcircuits—certified to the highest industry standards and trusted across medical, defense, and industrial markets for precision, quality, and compliance.

applications For BoX Build Assemblies

medical

We deliver complete, ready-to-deploy medical box builds with precision assembly, full traceability, and regulatory alignment.

industrial

Our rugged, fully integrated box builds are engineered to thrive in demanding industrial environments.

energy

EI Micro’s energy-sector box builds combine PCB performance with enclosures designed for power, safety, and longevity.

agriculture

We produce field-ready box builds for agricultural tech—compact, durable, and optimized for environmental resilience.

EI Microcircuits builds high-layer count, high-performance assemblies for the emerging AI market. Our advanced SMT and quality systems ensure reliable, complex builds for HPC applications.

aviation

We engineer flight-certified box builds with full system integration, aerospace-grade testing, and airworthiness documentation.

military

Mission-critical box builds meet strict specs for ruggedization, modularity, and secure electronic integration.

Security and Surveillance

Our box builds for surveillance tech ensure complete, secure integration—ready for plug-and-protect performance.

through-hole

Durable, high-reliability assembly for rugged and high-power applications.

inspection

Ensures precision, quality, and compliance at every production stage.

box build

EI offers a wide range of box build services including full electromechanical assembly.

overmolding

EI offers premolding and overmolding of a wide variety of materials in house.

potting

Protects electronics from moisture, vibration, and harsh environmental conditions.

our certifications

AMTIVO ISO 13485:2016 Certified Medical Devices logo in a square, with "AMTIVO" at the top and text at the bottom.
ISO 9001:2015 certified logo: AMTIVO with stylized "A" symbol, white background, and "Quality Management" text.
Square logo with "AMTIVO" brand, AS9100 D Certified for Aerospace.
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hear it from our customers

"A delightful company to work with. Could not have done it without your expertise."

"EI excels in responsiveness, support and flexibility. I very much appreciate EI’s ability to adapt on the fly."

"I appreciate the work EI does most of all because it makes my job easier."

"Overall, EI does a great job in dealing with everything we throw at them. They are responsive and understanding of us, even though it may not always be the most reasonable of requests. As a buyer, I feel lucky to have a supplier that works with us like they do."

"Working on a project that had a board that was simply not manufacturable the way it was set up, EI went above and beyond to help with engineering and still met a very short deadline."

Two women working at a table, soldering circuit boards. They wear glasses, and are in a factory setting.

Electronic Insights

A person is holding a motherboard in their hands in a black and white photo.

Field Programmable Gate Arrays (FPGA) Explained

July 7, 2025
Learn how Field Programmable Gate Arrays (FPGAs) work, their types, benefits, and industry applications—from prototyping to high-performance computing.
A bunch of green circuit boards are stacked on top of each other on a table.

Understanding Surface Mount Technology (SMT)

By EI Microcircuits • July 9, 2025
Explore Surface Mount Technology (SMT) in electronics manufacturing—how it enables compact, high-performance assemblies for medical, aerospace, and industrial applications.
A woman is looking at a circuit board with a magnifying glass.

What are Box Build Assemblies in Electronics Manufacturing?

By EI Microcircuits • July 9, 2025
Discover what box build assemblies are in electronics manufacturing. Learn how final product integration—PCBA, enclosures, wiring, testing—boosts quality, speed, and reliability.
A circuit board with the words class 1 2 and 3 on it

Understanding IPC Class 1, 2, & 3 Certifications

By EI Microcircuits • July 9, 2025
Learn the differences between IPC Class 1, 2, and 3 certifications for PCB assemblies. Discover how each class impacts manufacturing quality, reliability, and industry use.

let's talk

EI Microcircuits operates multiple climate-controlled facilities designed for scalability, technical excellence, and built-in disaster resilience—each fully equipped to support today’s most advanced electronic assemblies. Let us be the solution to your next project—Contact Us, Request a Quote, or Schedule a Tour today!

Contact Us Today

MANKATO, MN

1651 Pohl Road
Mankato, MN 56001
P: 507.345.5786

ST. PETER, MN

2011 Klein Street
St. Peter, MN 56082
P: 507.934.5722

MANKATO, MN

69 Power Drive
Mankato, MN 56001

P: 507.386.9160

*Each facility is configured to support your production needs. While maintaining continuity with each other in equipment, training and process control. All facilities share the same data center to allow for seamless manufacturing between locations.