PCB Assembly Supplier for Your Unique Requirements
LZJPCB provides SMT, through-hole, mixed-technology and turnkey PCB assembly from prototype through repeat volume production. Every accepted RFQ closes the PCB revision, BOM sourcing responsibility, assembly route, inspection, test records, price and fixed ship date before release.
- Since 2006
- 800+ employees
- 50+ engineers
- 4 production bases
PCB Assembly Technologies Tailored to Your Build
Choose SMT, through-hole, or mixed assembly to match your components, PCB design, and production volume.
SMT PCB Assembly
Your high-density PCB designs can accommodate fine-pitch components with precise placement, controlled soldering, and inspection.
- 01005, QFN, 0.35 mm BGA and PoP
- High-speed precision placement
- 3D SPI & AOI inspection
- X-ray for hidden solder joints
Through-Hole PCB Assembly
Your connectors and leaded components are securely mounted using controlled insertion and soldering processes.
- Connectors, transformers, power devices
- Manual and automated insertion
- Solder-joint, functional testing
- Wave, selective soldering
Mixed Technology & BGA Assembly
Your complex PCB designs can combine SMT, through-hole, and BGA components with controlled assembly sequences and traceability.
- SMT and THT sequence
- BGA/QFN X-ray inspection
- Full, partial, consigned turnkey
- BOM, component and lot traceability
Turnkey PCB Assembly for Your Supply Model
Choose how your PCB and components are sourced, with clear responsibilities from BOM review to final assembly.
Full Turnkey PCB Assembly
Send your design files and BOM. Your PCB fabrication, component sourcing, assembly, and testing are managed through one manufacturing process.
- PCB fabrication, component sourcing
- SMT, THT, mixed assembly
- Inspection, testing, delivery
Partial Turnkey & Consigned PCB Assembly
Supply your preferred components while we source the remaining parts and handle assembly, reducing your purchasing workload.
- Customer-supplied, factory-sourced parts
- Incoming component inspection
- Approved substitutions, shortage control
Component Sourcing & Kitting
Avoid production delays caused by missing or incorrect components through BOM verification, sourcing, and organized material preparation.
- MPN, approved vendor verification
- Alternates, lifecycle checks
- Component lot traceability
One-Stop PCB Manufacturing and Assembly
LZJPCB supports custom PCB fabrication to completed PCBA from 1 to 40 layers. Your board specifications, component data, and assembly requirements are coordinated through one production process.
Complete Value-Added PCB Assembly Services
Take your PCBA beyond board assembly with box build, soldering, conformal coating, and cable integration all coordinated through one supplier.
Box Build Assembly
Get your assembled PCBs integrated into enclosures with connectors, wiring, labeling, and system-level testing according to your product requirements.
Explore Box Build →PCB Soldering and Rework
Your PCBs receive controlled soldering, component replacement, and approved rework, with solder-joint inspection to meet your quality requirements.
Explore Soldering →Conformal Coating
Protect your PCBA from moisture and environmental exposure with controlled cleaning, selective masking, and conformal coating.
Explore Coating →Cable and Wire Harness Integration
Get your cables, connectors, and wire harnesses assembled and integrated with your PCBA, with pinout verification and continuity testing.
PCB Assembly for Your Specialized Board Requirements
Assembly controls change with flex behavior, density, thermal mass, laminate system and board construction. The accepted route links the board type to tooling, handling, soldering and inspection.
Flex PCB Assembly
Explore PCBRigid-Flex PCB Assembly
Explore PCBHDI PCB Assembly
Explore PCBMultilayer PCB Assembly
Explore PCBCopper Core PCB Assembly
Explore PCBCeramic PCB Assembly
Explore PCBMetal Core PCB Assembly
Explore PCBHigh Frequency PCB Assembly
Explore PCBRF & Microwave PCB Assembly
Explore PCBHeavy Copper PCB Assembly
Explore PCBAluminum PCB Assembly
Explore PCBFR4 PCB Assembly
Explore PCBIndustry-Specific PCB Assembly for Your Application
Whether your PCBA faces vibration, heat, moisture, or strict quality requirements, your assembly, inspection, and testing processes are tailored to your application's needs.
Industrial PCB Assembly
Explore PCBAutomotive PCB Assembly
Explore PCBMedical PCB Assembly
View Case →Robot PCB Assembly
Explore PCBIoT PCB Assembly
Explore PCBDrone PCB Assembly
Explore PCBPower Supply PCB Assembly
Explore PCBSmart Home PCB Assembly
Explore PCBTelecom PCB Assembly
Explore PCBAerospace PCB Assembly
Explore PCBPCB Assembly from Prototype to Volume Production
From initial prototypes to mass production, get the assembly, testing, and production support your project needs at every stage.
Prototype PCB Assembly
Validate your PCB design before production with DFM review, first-article inspection, and functional testing.
Explore Prototype →Low Volume PCB Assembly
Produce small batches with flexible quantities, controlled BOM revisions, and consistent assembly quality.
Explore Low Volume →High Volume PCB Assembly
Scale your production with automated assembly, in-process inspection, component traceability, and consistent quality across batches.
Quick Turn PCB Assembly
Meet tight project schedules with rapid engineering review, component availability checks, and expedited assembly.
Review Lead Time →Complete PCB Assembly Quality Control and Testing
Every accepted inspection and test has a defined input, gate, acceptance limit and record owner. Results stay linked to the PCB revision, BOM revision, component lots and production traveler.
BOM Verify
Component cross-check
3D SPI
Solder paste height scan
AOI Optical
Component placement check
X-RAY
BGA & buried via check
TEST Functional
Signal & power verification
FINAL Release
QC approval & shipment
98%+
Batch Yield
100%
AOI + E-Test
IPC
Class 2 / 3
PCB Assembly Standards
& Certifications
Meet your PCB assembly quality and compliance requirements with IPC workmanship standards, ISO 9001 quality management, and project-specific documentation.
IPC Assembly Standards
Define your PCBA acceptance criteria based on your product's reliability requirements.
- IPC-A-610 Class 2 & 3
- J-STD-001 soldering requirements
- Visual & solder-joint acceptance
ISO 9001:2015 Quality Management
Your PCB assembly is managed through documented quality procedures and controlled production processes.
- Incoming material control
- Production process records
- Quality traceability
RoHS & REACH Compliance
Meet your market's environmental requirements with compliant materials and documented assembly processes.
- Lead-free PCB assembly
- RoHS-compliant materials
- REACH material declarations
Project-Specific Quality Requirements
Specify the additional workmanship, testing, and documentation your industry or application requires.
- Customer-defined acceptance criteria
- Industry-specific quality requirements
- Inspection & test documentation
Quality Documentation for Your Project
Request applicable certificates, inspection reports, and traceability records for your PCB assembly order.
Why Choose Us as Your PCB Assembly Partner
With 20 years of manufacturing experience, 50+ engineers, and 5,000+ PCB/PCBA projects, LZJPCB helps you reduce production risks from prototype to mass production.
Engineering and Manufacturing Support You Can Rely On
Your PCB assembly is backed by an experienced engineering team, in-house manufacturing, and controlled quality processes.
PCB Assembly Case Studies
See how complex PCB assembly requirements are handled through engineering, manufacturing, and testing.
Mixed-Technology PCB Assembly for Industrial Control
Challenge
Combining fine-pitch SMT components with through-hole connectors and power devices.
Our Solution
DFM review, controlled SMT and THT soldering, and functional testing.
Result
99.2% first-pass yield. All boards passed functional testing, with zero solder defects on fine-pitch and through-hole joints.
High-Density PCB Assembly with Fine-Pitch BGA
Challenge
Achieving reliable soldering and inspecting hidden joints on densely populated boards.
Our Solution
Precision placement, controlled reflow, 3D SPI, AOI, and X-ray inspection.
Result
X-ray confirmed zero voids and bridging on all BGA joints. 100% of boards passed AOI and functional testing.
Rigid-Flex PCB Assembly with Custom Fixtures
Challenge
Protecting flexible sections during component placement, soldering, and handling.
Our Solution
Custom support fixtures, bend-area protection, and controlled assembly processes.
Result
100% first-pass assembly yield. No flex-section damage or delamination. All units passed functional and bend-cycle testing.
PCB Assembly Cost Calculator
Instant budgetary estimates for PCB assembly. For a firm quote email jayden@lzjpcb.com or use the button below.
Our PCB Assembly Process
From file review and material preparation to assembly, inspection and final testing, every project follows a controlled production workflow.
BOM & File Review
Gerber · BOM · Pick & Place · Drawings
Component Sourcing & Kitting
Material Verification · Production Preparation
Solder Paste Printing
Stencil · 3D SPI Inspection
Pick & Place
SMT Component Placement · ±0.025mm Accuracy
Reflow Soldering
Controlled Reflow Profile · Lead-Free Compliant
AOI / X-Ray Inspection
Placement & Solder Joint Inspection · 100% Coverage
Through-Hole Assembly
THT · Wave / Selective / Manual Soldering
Cleaning & Rework
Process According to Project Requirements
Testing
Electrical · Functional · Programming · ICT
Final Inspection & Packaging
Verification · Traceability · Shipment Ready
Get a PCB
Assembly Quote
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PCB Assembly FAQ You Need Before Ordering
Answers about PCB assembly services, files, cost, lead time and production quantities.
What is PCB assembly?
PCB assembly is the process of attaching and soldering electronic components to a fabricated printed circuit board, then inspecting and testing the resulting PCBA against an accepted production package.
What is the difference between PCB fabrication and PCB assembly?
PCB fabrication produces the bare circuit board with copper features, holes, laminate and surface finish. PCB assembly adds components through SMT, through-hole or mixed processes and produces the populated PCBA.
What is turnkey PCB assembly?
Turnkey PCB assembly assigns one supplier to coordinate the accepted PCB fabrication, component sourcing, assembly, inspection and testing scope. Full, partial and consigned models differ by who supplies each material line.
What files are required for PCB assembly?
Submit Gerber or ODB++, drill and fabrication drawings, BOM, centroid or Pick-and-Place data, assembly drawings, quantity, approved-alternate rules and test requirements.
How much does PCB assembly cost?
The fixed quote is calculated from the PCB, BOM, sourcing model, setup, placement count, packages, SMT/THT work, inspection, testing, quantity and accepted schedule.
How long does PCB assembly take?
The quotation issues one fixed ship date after files, BOM availability, material responsibility, assembly route, test scope and quantity are accepted. A generic duration is not used in place of the project schedule.
Can you support prototype, low-volume and high-volume PCB assembly?
Yes. LZJPCB supports prototype, low-volume and repeat volume assembly. Each stage uses a defined quantity, BOM status, inspection plan, test scope and change-control rule.
Send the production files, BOM, centroid, drawings, quantity, sourcing model and test requirements.
