Box Build Assembly Services
Complete turnkey system integration. We combine PCBA, custom wire harnessing, and mechanical assembly to deliver a finished product ready for shipment. Reduce your supply chain complexity and accelerate time-to-market by consolidating manufacturing under one roof.
Beyond the Circuit Board
Most contract manufacturers stop at the PCB. We finish the job. Our box build services handle the full system integration, ensuring your electronic and mechanical subsystems work in perfect harmony.
Turnkey System Integration
We consolidate your supply chain by managing PCBA, mechanical assembly, and cable production.
Mechanical Assembly Expertise
From simple sheet metal enclosures to complex plastic housings with ultrasonic welding, our team handles all mechanical aspects.
In-House Cable Harnessing
Unlike many CMs who outsource wiring, we manufacture custom wire harnesses and cable assemblies in-house.
System-Level Testing
Beyond ICT and functional circuit tests, we perform full system validation including burn-in and environmental stress screening.
Why Choose Full Box Build?
Managing multiple vendors for PCB, cables, and metalwork introduces risk. Consolidating these services improves accountability and reduces total landed cost.
| Parameter | Standard CM (PCBA Only) | Our Box Build Service |
|---|---|---|
| Supply Chain Scope | PCB components only | PCB + Mechanical + Cables + Packaging |
| System Level Testing | Limited to ICT/FCT on board | Full system functional test, burn-in, and HALT/HASS |
| Communication Overhead | High (Multiple vendors to coordinate) | Low (Single point of contact) |
| Defect Responsibility | Blame game between vendors | Full accountability for final unit |
| Inventory Risk | Customer manages WIP between vendors | Consignment or Turnkey, managed internally |
| Lead Time (Total) | 8-12 weeks (Cumulative vendor lead times) | 3-6 weeks (Parallel processing) |
Integration Workflow
01
Material Procurement & Kitting
We consolidate electronic and mechanical components into a single kit.
02
PCBA & Sub-Assembly
PCBs are assembled and tested first. Concurrently, cable harnesses and mechanical sub-assemblies (e.g., power supplies, display panels) are fabricated.
03
System Integration
The 'marriage' phase where PCBA is mounted into the chassis.
04
Firmware & Configuration
We load firmware, set MAC addresses, and calibrate sensors.
05
Final Test & Quality Audit
Comprehensive functional testing followed by a cosmetic inspection. We perform a final audit of packaging inserts, labels, and accessories before shipment.
Representative Application: Industrial IoT Gateway
Challenge
A typical industrial automation program needs to launch a ruggedized IoT gateway, but faces delays coordinating between several vendors: the PCB shop, the sheet metal shop, the cable assembler, and the firmware team. Lead times stretch out, and yield suffers due to integration mismatches.
Solution
We took over the entire box build. We redesigned the cable harness to reduce strain relief issues, sourced a die-cast enclosure with better EMI shielding, and implemented an automated test fixture that simulated the industrial field environment (vibration and temperature).
Results
Total lead time can drop to around 5 weeks. First pass yield increases significantly due to pre-integration testing, and the buyer reduces administrative overhead by issuing a single PO instead of several.
Frequently Asked Questions
What is the minimum order quantity (MOQ) for box build services?
Our MOQ for box build assemblies typically starts at 50 units. For low-volume production and prototyping phases (NPI), we can often accommodate orders as low as 10 units to support your engineering validation and pilot runs.
What is the typical lead time for a complete box build project?
Lead times vary based on component availability and mechanical complexity. Standard lead times range from 3 to 6 weeks. For urgent projects, we offer expedited scheduling that can reduce turnaround to 2 weeks, subject to material stock status.
What files are required to get a quote for box build assembly?
To provide an accurate quote, we require the Gerber files for the PCBA, the Bill of Materials (BOM) with approved vendors, mechanical drawings (STEP or DXF) for enclosures, assembly drawings, and a test plan or test specifications if available.
Do you source the mechanical components and enclosures?
Yes, we offer full turnkey procurement. We can source all mechanical components including enclosures, sheet metal parts, fasteners, and cables. We leverage our supply chain network to ensure cost-effectiveness and timely delivery of all non-electronic parts.
How does box build differ from standard PCB assembly?
Standard PCB assembly focuses solely on populating the bare board. Box build assembly encompasses the entire system integration process, including PCB assembly, cable harnessing, mechanical assembly, firmware loading, system-level testing, and final packaging, delivering a finished product ready for the market.
What certifications do your box build facilities hold?
Our manufacturing facilities are ISO 9001:2015 certified. For specific industries, we also comply with IPC-A-610 Class 2 and Class 3 standards for electronics assembly acceptance, ensuring high reliability for industrial and automotive applications.
Related Services
PCB Assembly (PCBA)
High-quality SMT and through-hole assembly for your circuit boards.
Learn moreCable Harness Assembly
Custom wire harnesses manufactured to support your box build requirements.
Learn moreCustom Cable Assembly
Precision cable assemblies for data, power, and signal transmission.
Learn moreReady to Simplify Your Supply Chain?
Send us your BOM, Gerber files, and mechanical drawings. Our engineering team will review your design for manufacturability and provide a comprehensive quote for the complete box build within 48 hours.
Request a QuoteReviewed by: Engineering Team, PCB Insider | Last updated: 2026-04-14