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PCB Assembly Services
LZJPCB is an ISO 9001 and IATF 16949 certified PCB Assembly Manufacturer. Providing full PCBA services. from PCB manufacturing and component procurement to SMT, through-hole and BGA assembly, functional testing, and box-build assembly services. With 20 years of EMS experience, a monthly production capacity of 58,000 square meters, and a first pass yield rate of 98%. We serve over 2,600 clients across 50 countries.
Senior Electronics Engineer
24h Quick Turn
98% First-Pass Yield
58000 m²/Month
100% AOI and X-Ray
What is Turnkey PCB Assembly Services?
Turnkey PCB assembly, also known as full turnkey PCBA, turnkey EMS, or turnkey electronics manufacturing, is a one-stop service. Every step from design files to finished products is covered, a single manufacturer is responsible for assembling the printed circuit board. and optional box-build assembly services.
Full Turnkey PCBA compared to other assembly models
| Model | Who Sources Components | Best For |
|---|---|---|
| Full Turnkey PCBA | Manufacturer (100%) | Startups, OEMs |
| Partial Turnkey | Manufacturer (some) | Hard to find parts |
| Consigned Assembly | Customer (100%) | In house supply |
| Kitted Assembly | Customer (pre kitted) | Legacy programs |
Why 87% of LZJPCB Customers Choose Full Turnkey
- Single point of accountability. one vendor owns quality.
- Faster time-to-market. no cross-vendor coordination delays.
- Lower total cost. consolidated sourcing reduces BOM cost by 15-25%.
- Counterfeit protection. only authorized distributors used.
- Scalable from 1 piece prototype to over 100,000 production
Related Industry Terms
Turnkey PCBA is also known by these industry-specific names:
- PCBA, PCB assembly, PCB and assembly refer to the same concept.
- Printed Circuit Board Assembly (PCA). Used in formal technical documents.
- Printed Wiring Board Assembly (PWBA or PWA). Common in Japanese and European standards.
- Circuit Card Assembly (CCA). Used in aerospace and military (MIL-STD terminology).
- PCB Assy or PCBA Assy. Engineering shorthand.
All terms refer to the same process: populating a bare printed circuit board with electronic components to create a functional assembly.
What's Included in LZJPCB's Turnkey PCBA Service
Every turnkey PCB assembly order from LZJPCB covers 6 stages. All stages are managed by a dedicated engineering team:
PCB Fabrication
We offer in-house PCB production from 1 to 40 layers, supporting FR-4, Rogers, and ceramic materials.
- 1 to 40 Layers
- All Materials
- IPC Class 2 or 3
- 3mil/3mil Trace
Component Sourcing (BOM Mgmt)
We maintain a database of over 1 million components, With direct partnerships from Digi-Key, Mouser, Arrow, and Avnet.
- Authorized Only
- Counterfeit-Free
- Kit Consolidation
- IPC-STD-001 Storage
SMT and Through-Hole Assembly
5 SMT lines and 2 THT lines run 24 hours a day, 7 days a week. Our facility handles 01005 passive components, 0.25mm pitch BGA, QFN, QFP, CSP, and PoP.
- 01005 to 150mm
- Double-Sided SMT
- BGA Reflow and X-Ray
Testing and Inspection
We perform 100% AOI inspection and X-Ray for BGA and QFN packages. ICT and functional testing are available on request.
- 100% AOI
- X-Ray for BGA and QFN
- ICT and functional testing (ICT/FCT)
- Burn-in available on request
Box Build & Sub-Assembly
We offer system-level integration services including cable assembly, enclosure integration, final product testing, and retail packaging.
- Cable Assembly
- Enclosure Integration
- Retail Packaging
- Drop and Vibration Test
Global Shipping and Logistics
We ship via DHL, FedEx, and UPS Express to over 50 countries with delivery in 3 to 5 days. Sea freight is available for volume orders. We provide full customs documentation.
- Shipping to over 50 countries
- DHL, FedEx, UPS, and TNT
- Insurance included
- Duty and tariff support
PCB Assembly Technologies We Support
LZJPCB operates 5 assembly technologies in parallel, chosen based on your board’s components, volume, and environmental requirements:
SMT Assembly (Surface Mount Technology)
Surface mount technology assembly is our primary process. Over 95% of modern PCBs use SMT, because it offers high density, automation compatibility, and cost efficiency.
LZJPCB operates 5 fully automated SMT lines. These lines use Yamaha YSM10 and Yamaha YSM20R pick-and-place machines. The total placement capacity is 8 million components per day.
| Parameter | LZJPCB Capability |
|---|---|
| Min Component Size | 01005 (0.4 × 0.2 mm) |
| Max Component Size | 150 × 150 mm |
| Min BGA Pitch | 0.25 mm |
| Min Ball Diameter (BGA) | 0.15 mm |
| Placement Accuracy | ±0.025 mm |
| Placement Speed | 120,000 CPH (components per hour) |
| Max PCB Size | 610 × 1100 mm |
| Min PCB Thickness | 0.4 mm |
| Double-Sided SMT | Supported |
| Advanced Packages Supported | BGA, QFN, QFP, CSP, PoP, LGA, and flip-chip |
| Reflow Profile Control | Nitrogen reflow available |
| Stencil Printing | DEK and MPM automatic printers |
THT Assembly (Through-Hole Technology)
Through-hole PCB assembly, also referred to as PTH or plated through hole, involves inserting component leads into drilled holes in the PCB. This method provides superior mechanical strength, which makes it well-suited for applications that involve high vibration or high power.
LZJPCB operates wave soldering and selective soldering lines. These lines support pure THT boards as well as mixed SMT and THT boards.
| Parameter | LZJPCB Capability |
|---|---|
| Insertion Method | Manual and Auto-Insertion |
| Soldering Method | Wave Soldering and Selective Soldering |
| Min Hole Size | 0.3 mm |
| Max Lead Count per Board | 5,000 or more |
| Nitrogen Wave Soldering | Available |
| Typical applications | Connectors, Transformers, Power Modules, Relays, Automotive, Aerospace |
Mixed SMT and THT Assembly
Most modern PCBs require mixed assembly. SMT components are placed on one or both sides, while through-hole components are used for connectors and heavy-duty parts. LZJPCB handles complex mixed assembly with this process:
| Step | Process |
|---|---|
| 1 | SMT paste printing |
| 2 | SMT component placement |
| 3 | Reflow soldering |
| 4 | THT component insertion |
| 5 | Wave or selective soldering |
| 6 | Final inspection |
BGA and Fine-Pitch Assembly
LZJPCB specializes in high-density BGA (Ball Grid Array) and fine-pitch assembly. We support pitches down to 0.25 mm. This capability separates true EMS providers from basic assembly shops. Fewer than 20% of PCB assemblers can reliably handle 0.25 mm pitch.
| Parameter | LZJPCB Capability |
|---|---|
| BGA Types Supported | Standard BGA, micro BGA (μBGA), CBGA, PBGA, FBGA, CSP, PoP |
| Min BGA Pitch | 0.25 mm |
| Min Ball Diameter | 0.15 mm |
| BGA Rework | Supported with rework stations |
| X-Ray Inspection | 100% on BGA and QFN packages |
| Reball Service | Available |
| Underfill service | Available |
Complete PCBA Assembly Specifications
LZJPCB provides complete technical specifications for all turnkey PCB assembly orders. Every parameter below has been verified in production, complies with IPC-A-610 Class 2 and Class 3 standards.
Assembly Capability Summary
| Parameter | LZJPCB Capability |
|---|---|
| Assembly Types | SMT, THT and PTH, Mixed, BGA, Fine-Pitch, Box Build |
| Min Order Quantity | 1 Piece (Prototype) |
| Max Order Quantity | Over 100,000 Pieces Per Month |
| Min Component Size | 01005 (0.4 × 0.2 mm) |
| Max Component Size | 150 × 150 mm |
| Min BGA Pitch | 0.25 mm |
| Min Hole Size (THT) | 0.3 mm |
| Max PCB Size | 610 × 1,100 mm |
| Min PCB Thickness | 0.4 mm |
| Max PCB Thickness | 6.0 mm |
| Layer Count | 1 to 40 layers |
| Board Types Supported | Rigid, Flex, Rigid-Flex, Metal-Core, Ceramic |
| Solder Paste Type | Lead-free (RoHS) and Leaded |
| Conformal Coating | Silicone, Acrylic, Urethane, Parylene |
| Potting and Encapsulation | Available |
| Underfill (BGA) | Available |
| IPC Standard Compliance | IPC-A-610 Class 2 and Class 3, IPC-J-STD-001 |
| First-Pass Yield Rate | 98% |
| On-Time Delivery Rate | 99% |
Supported Printed Circuit Board Types for Assembly
- Rigid PCB assembly: 1 to 40 layers, FR-4 to Rogers.
- Flex PCB assembly: Polyimide single-sided and double-sided FPC (flexible printed circuit).
- Rigid-flex PCB assembly: Hybrid rigid and flexible structure.
- Multilayer PCB assembly: Up to 40 layers, including HDI (high-density interconnect) any-layer designs.
- Aluminum and metal-core PCB assembly: Designed for LED and power applications.
- Ceramic PCB assembly: Ideal for high-frequency and thermal applications.
- High-frequency PCB assembly: Supports Rogers and Taconic materials for 5G and RF (radio frequency) applications.
PCBA Volume Capabilities: 1 Piece to Over 100,000 Units
LZJPCB’s turnkey PCB assembly supports every volume tier, with dedicated process flows optimized for each:
Prototype PCBA
1 to 10 pieces
Rapid prototyping for engineering validation and design iteration.
- 24h Quick-Turn
- Free DFM Review
- 1 Piece MOQ
- NDA Protected
Best For:
Hardware Startups and R&D Labs
Low-Volume and Small-Batch PCBA
10 to 1000 pieces
Short-run production for product launches, pilot runs, and market validation.
- 3 to 7 Day Lead Time
- Dedicated Production Line For Small Batches
- Flexible Lead Time Available
- No Setup Fee
Best For:
Startups Scaling, Kickstarter Products
High Volume PCBA Assembly
1000 to 100000+ pieces
Scalable mass production with IATF 16949 automotive grade quality control.
- 7 to 15 Day Lead Time
- IATF 16949 Certified
- SPC Process Control
- 58,000 m²/Month Cap.
Best For:
OEMs, Tier-1 Suppliers, and Automotive and Medical Applications
Quick Turn PCB Assembly: Fastest Turnaround in China
LZJPCB’s quick-turn PCB assembly service gets functional PCBA to you fast, in as little as 24 hours for simple designs, and 3 to 5 days for more complex multilayer boards with BGA. And we’re pretty reliable, with a 99% on-time delivery record.
| PCBA Complexity | Lead Time | Rush Option |
|---|---|---|
| 1 to 2 Layers, SMT Only | 24 hours | 12 hours |
| 4 to 6 Layers, SMT and THT | 48 to 72 hours | 36 hours |
| 8 to 10 Layers With BGA | 3 to 5 days | 2 days |
| HDI or Rigid-Flex With BGA | 5 to 7 days | 4 days |
| Low-Volume Production | 7 to 10 days | 5 days |
| Mass Production (1,000 to 10,000 Pieces) | 10 to 15 days | 7 to 10 days |
| Mass Production (Over 10,000 Pieces) | 15 to 25 days | 12 to 15 days |
LZJPCB achieves industry-leading turnaround through:
- Over 1 million component database eliminates sourcing delays
- 5 SMT lines and 2 THT lines running 24 hours a day, 7 days a week
- In-house PCB fabrication removes external fab wait times
- Dedicated quick-turn project manager assigned to every order
PCB Box Build Assembly Services
Beyond PCBA, LZJPCB also offers full box-build assembly services, where we assemble your printed circuit boards into finished products, ready to ship to retailers or OEMs. This is the top level of Electronics Manufacturing Services, and it sets us apart. We’re talking about complete products, not just circuit boards, but finished goods that are ready for retail.
What is included in box build
- Cable harness assembly and crimping
- Enclosure assembly (metal, plastic, custom)
- Mechanical sub-assembly integration
- PCBA to enclosure mounting and wiring
- Firmware programming and flashing
- Final product functional testing
- Drop, vibration, and environmental testing
- Retail packaging and labeling
- Serialization and traceability
- Direct-to-customer (D2C) drop shipping
PCB sub assembly
For OEMs integrating our PCBAs into their own box-build process, LZJPCB provides sub-assembly services:
- PCBA and cable pre-integration
- PCBA and heat sink pre-mounting
- PCBA and display module integration
- PCBA and battery pre-integration
- Kitted sub-assemblies ready for final integration
Turnkey vs Consigned PCB Assembly: Which Is Right for You?
One of the most common questions from first-time PCBA customers is: Should I use turnkey or consigned assembly?
Here is the full breakdown:
| Factor | Turnkey PCBA | Consigned PCBA |
|---|---|---|
| Component Sourcing | Manufacturer | Customer |
| BOM Management | Manufacturer | Customer |
| Counterfeit Risk | Low — authorized distributors only | Medium — customer responsibility |
| Time to Market | Faster — 8 to 15 days | Slower — depends on customer shipping |
| Upfront Cost | Higher — components included in quote | Lower — no component markup |
| Total Project Cost | Lower due to bulk purchasing power | Often higher due to small buyer disadvantage |
| IP Control | NDA-protected (non-disclosure agreement) | Full customer IP |
| Best For | Startups, OEMs, product launches | Customers with existing component inventory |
| LZJPCB Recommendation | We recommend turnkey for 90% of projects | We support consigned for existing programs |
LZJPCB Supports Both Turnkey and Consigned Assembly
- LZJPCB applies the same quality standards to both turnkey and consigned assembly
- LZJPCB applies the same testing protocols to both models
- Quality standards: IPC-A-610 Class 2 and Class 3
- First-pass yield: 98%
- Testing protocols include 100% AOI inspection
- Testing protocols include X-ray inspection for BGA packages
Industries Served by LZJPCB PCB Assembly
LZJPCB provides turnkey PCBA for four key industries, each with specialized certifications and process controls:
Automotive PCBA
We are IATF 16949 certified for automotive applications.
Key applications:
- Electric vehicle (EV) chargers
- Truck lighting systems
- Forklift electronic control units (ECUs)
Medical PCBA
We are ISO 13485 certified for medical devices.
Key applications:
- Continuous glucose monitoring (CGM) devices
- Therapeutic massagers
- Diagnostic equipment
Consumer Electronics PCBA
We are RoHS and REACH compliant.
Key applications:
- Massage guns
- Audio amplifiers
- Portable party speakers
Industrial PCBA
We are UL Listed for product safety and reliability.
Key applications:
- Elevator control systems
- Power electronics
- Industrial automation equipment
PCBA Quality Assurance and Testing
Every turnkey PCB assembly order undergoes a nine-stage quality control process, achieving a 98% first-pass yield and a 99% on-time delivery rate.
9-Stage PCBA Quality Control
- Incoming material inspection (IQC): We verify components and detect counterfeits.
- Solder paste inspection (SPI): Every piece gets a 100% paste volume check.
- Post-SMT AOI: Our automated optical inspection covers 100% of the boards.
- X-ray inspection: We use X-rays for 100% inspection of BGA, QFN, and hidden joints.
- Post-reflow visual inspection: We follow IPC-A-610 Class 2 and Class 3 standards.
- Post-THT visual inspection: Solder joint integrity is what we’re looking for.
- In-circuit test (ICT): This step is optional, but it’s for electrical verification.
- Functional test (FCT): The customer provides the test plan for this one.
- Outgoing quality control (OQC): A final audit before we ship anything out.
Testing Methods We Offer
- AOI, or automated optical inspection, is now a standard feature on all PCBs, no exceptions.
- We use X-ray inspection on 100% of BGA and QFN packages.
- ICT, or in-circuit testing, involves fixture-based electrical testing, which gives us a good idea of the board’s overall health.
- FCT, functional circuit testing, relies on custom test programs that we create based on each customer’s specs.
- Flying probe testing is great for prototypes because it doesn’t require a fixture, and it’s pretty versatile.
- Burn-in testing is a 48 to 72 hour process that involves thermal cycling, which can be tough on the boards.
- Boundary scan, also known as JTAG, is what we use for complex digital boards that are hard to access physically.
PCBA Rework and Repair Services
LZJPCB provides full rework capability for both LZJPCB-built and customer-supplied PCBAs:
- We offer BGA rework with X-ray verification, which helps ensure the job’s done right.
- Component replacement is available for a range of parts, including passive, active, and connector components.
- And for reused BGA components, LZJPCB provides a reball service.
- Track repair and wire-jumper correction are also part of their services.
- Conformal coating rework is another option, so customers can get their PCBAs back in working order.
Certifications and Compliance
- ISO 9001:2015 is about quality management
- IATF 16949 is for the automotive industry, focusing on quality
- ISO 13485 deals with medical device quality
- And ISO 14001 is all about environmental management
- We’re UL Recognized, which means we meet US and Canada safety standards
- Our products are RoHS compliant, so they don’t have hazardous substances
- We’re also REACH compliant, which is the EU’s chemical safety regulation
- IPC-A-610 Class 2 and Class 3 are the standards we follow for assembly acceptability
- IPC-J-STD-001 has the soldering requirements we need to meet
LZJPCB have these certifications and comply with regulations, it’s not just about checking boxes.
PCB Assembly Cost — What Determines Your PCBA Price?
PCB assembly cost at LZJPCB is calculated transparently based on seven factors. Understanding these factors helps you optimize your design for lower cost without sacrificing quality.
- PCB fabrication cost: This depends on layer count and board size. Materials like FR-4 or Rogers matter too, as does the surface finish, such as HASL or ENIG.
- Component BOM cost: This part is usually 60 to 80% of the total PCBA cost. But it really depends on the specific parts you choose and where you source them.
- Assembly complexity: SMT-only is the cheapest option, mixed SMT and THT costs more. BGA or fine-pitch work sits at the high end of the price scale.
- Volume and quantity: Your per-unit cost drops 40 to 60% when you go from 100 pieces to 10,000 pieces. Which is a massive jump.
- Testing requirements: AOI is normally included. But an ICT fixture (which runs $1,500 to $5,000 NRE) or extra FCT programming will add to the bill.
- Turnaround time: You can use the standard lead time as a baseline. Or you can pay a 30 to 50% premium for a 24-hour quick-turn.
- Special processes: This covers things like conformal coating, potting, underfill, and any custom packaging you might need.
How to Reduce PCBA Cost: 5 Engineer Tips
- Standardize components across projects to gain bulk discounts and reduce BOM cost
- Use SMT over THT where possible for faster assembly and lower labor cost
- Avoid 0.25 mm BGA if 0.4 mm BGA works to reduce rework risk and increase yield
- Panelize efficiently to fit more boards per panel and reduce fabrication cost
- Order in volume tiers of 100, 500, 1,000, or 5,000 pieces to optimize per-unit pricing
Get Your Transparent PCBA Quote
Upload your Gerber and BOM files. Our engineers will return a detailed line-item quote within 12 hours covering:
- PCB fabrication cost
- Component BOM cost with alternate sourcing options
- Assembly labor cost
- Testing cost
- Shipping cost
- Total landed cost
Frequently Asked Questions: Turnkey PCB Assembly
What is turnkey PCB assembly?
Turnkey PCB assembly is a one-stop service. It is also called full turnkey PCBA or turnkey EMS.
A single manufacturer handles PCB fabrication, component sourcing, SMT and through-hole assembly, testing, and optional box-build integration.
This eliminates the need to coordinate multiple vendors.
What is the difference between turnkey and consigned PCB assembly?
In turnkey PCB assembly, the manufacturer sources all components and manages the entire BOM.
In consigned assembly, the customer supplies all components, and the manufacturer only performs the assembly labor.
Turnkey is faster and typically has lower total cost. Consigned gives the customer more control over components.
What is LZJPCB's minimum order quantity for PCB assembly?
LZJPCB has no MOQ for turnkey PCB assembly prototypes. We accept orders starting at 1 piece.
For production runs, the minimum volume is 50 pieces.
We serve hardware startups and Fortune 500 OEMs with the same quality standards.
How fast can LZJPCB complete PCB assembly?
LZJPCB offers these lead times:
- Simple 1 to 2 layer SMT-only boards: 24 hours (quick-turn)
- 4 to 6 layer boards: 48 to 72 hours
- 8 to 10 layer boards with BGA: 3 to 5 days
- Volume production: 7 to 15 days
We maintain a 100% on-time delivery record.
What is the difference between PCB, PCBA, and PWBA?
- PCB stands for bare Printed Circuit Board with no components.
- PCBA stands for PCB Assembly, which is a board populated with components.
- PWBA stands for Printed Wiring Board Assembly. This is a Japanese and European term that means the same as PCBA.
- CCA stands for Circuit Card Assembly. This is an aerospace and military term that also means the same as PCBA.
Does LZJPCB source components, or do I need to provide them?
Both options are available.
For turnkey service, LZJPCB sources all components. We use authorized distributors including Digi-Key, Mouser, Arrow, and Avnet. We have access to a database of over 1 million components.
We also accept consigned components if you prefer to use your existing supply chain.
Can LZJPCB assemble BGA and fine-pitch components?
Yes, LZJPCB specializes in BGA and fine-pitch assembly.
We support BGA pitches down to 0.25 mm and ball diameters down to 0.15 mm.
We provide 100% X-ray inspection, BGA rework stations, and reball services.
We handle all advanced packages including BGA, micro BGA (µBGA), QFN, CSP, PoP, LGA, and flip-chip.
Does LZJPCB handle both SMT and through-hole assembly?
Yes. LZJPCB operates 5 SMT lines and 2 THT lines, including wave soldering and selective soldering. We handle pure SMT, pure through-hole (PTH), and mixed SMT and THT assembly on the same board.
What is box-build PCB assembly?
Box-build PCB assembly is also called system integration. It is the highest tier of EMS service.
This service combines PCBA with enclosure assembly, cable harnesses, firmware programming, final product testing, and retail packaging.
LZJPCB provides full box-build services.
How does LZJPCB ensure component authenticity and avoid counterfeits?
LZJPCB sources components only from authorized distributors and verified franchised suppliers. Our authorized distributors include Digi-Key, Mouser, Arrow, and Avnet.
All components undergo incoming quality control (IQC) inspection, including authenticity verification.
For critical parts, we also offer X-ray inspection and decapsulation verification.
What IPC standards does LZJPCB comply with?
LZJPCB complies with the following IPC standards:
All PCBA orders default to IPC-A-610 Class 2, which covers general electronics.
IPC-A-610 Class 3 for high-reliability applications (aerospace and medical) is available on request.
Soldering follows IPC-J-STD-001.
Documentation follows IPC-T-50.
Does LZJPCB offer PCBA rework and repair services?
Yes, LZJPCB provides full PCBA rework and repair services for both LZJPCB-built and customer-supplied boards.
Services include:
- BGA rework with X-ray verification
- Component replacement
- BGA reball (rebuild)
- Track repair
- Conformal coating rework
Can LZJPCB assemble flex and rigid-flex PCBs?
Yes, LZJPCB handles both flex PCB and rigid-flex PCB assembly.
For flex PCB, we support single-sided and double-sided flexible printed circuits (FPC).
For rigid-flex PCB, we use specialized tooling, vacuum fixtures, and low-stress reflow profiles to prevent flex circuit damage.
What testing is included in LZJPCB's PCBA service?
LZJPCB offers standard testing and optional testing.
Standard testing includes 100% AOI (automated optical inspection), 100% X-ray for BGA and QFN packages, and visual inspection at 3 stages.
Optional testing includes ICT, FCT (functional circuit testing) with customer-provided test plan, flying probe, burn-in, and boundary scan.
How do I get a PCB assembly quote from LZJPCB?
1. Upload your Gerber files, BOM (bill of materials), and assembly drawings through our online quote portal.
2. You will receive a detailed line-item quote within 4 hours. Most quotes are delivered in under 1 hour.
3. If requested, we will sign a non-disclosure agreement (NDA) before reviewing your files.
Get Your Turnkey PCB Assembly Quote in 12h
LZJPCB’s engineering team reviews every Gerber and BOM personally — no algorithm auto-quote, no hidden fees.
