Turnkey PCB Assembly Services

PCB Fabrication • Component Sourcing • SMT & THT Assembly • Testing • Box Build

Leader Global Electronics is a Taiwan-based PCB assembly manufacturer providing turnkey PCB assembly services for U.S. and international OEM customers, from prototype and NPI through pilot and repeat production.

We coordinate PCB fabrication, component sourcing, SMT/THT assembly, inspection, programming, functional testing, and box build under one manufacturing program.

Each project is reviewed before quotation to verify manufacturing data, component availability, assembly requirements, testing requirements, and production quantities.

Turnkey PCB Assembly Overview

Taiwan-Based PCB Assembly Manufacturer
Engineering Review Before Quotation
PCB Fabrication & Component Sourcing
SMT, THT & Mixed-Technology Assembly
SPI, AOI & X-Ray Inspection
ICT & Functional Testing
Programming & Firmware Loading
Box Build & System Integration
Turnkey, Partial-Turnkey & Consigned PCB Assembly
Prototype • NPI • Pilot • Repeat Production
ISO 9001, ISO 14001 & ISO 13485 Certified
NDA Available Upon Request

Turnkey PCB assembly process including PCB fabrication, component sourcing, SMT assembly, inspection, THT assembly, testing, box build and final shipment.

Request a Turnkey PCB Assembly Quote

To prepare an accurate quotation, please provide the available manufacturing files and project requirements.

Recommended RFQ Information

BOM with Manufacturer Names & MPNs
Gerber Files
PCB Fabrication Specifications & Stack-Up, if applicable
Pick & Place / Centroid Data
PCBA Assembly Drawings
Required Quantities
Expected Annual Volume, if available
Approved Manufacturer / AVL Requirements, if applicable
Component Substitution Restrictions
Programming Required: Yes / No
Functional Testing Required: Yes / No
Estimated Test Time per Board, if applicable
Special PCB Fabrication or Assembly Requirements
Customer-Supplied Components, if applicable
Target Production Schedule, if available

If pricing is required at several production quantities, please include each required quantity in the RFQ.

Our engineering and sourcing teams will review the available information and advise if additional documentation is required before quotation.

Email: sales@leaderelec.com.tw

NDA available upon request.

What Is Included in Our Turnkey PCB Assembly Service?

Depending on the project, our manufacturing scope can include:

Engineering Review
PCB Fabrication
Component Sourcing & Procurement
BOM Management
SMT Assembly
Through-Hole Assembly
Mixed-Technology Assembly
Programming & Firmware Loading
SPI, AOI & X-Ray Inspection
ICT & Functional Testing
Box Build & System Integration
Final Inspection
Packaging & Shipment Coordination

The manufacturing scope is defined according to the product, BOM, sourcing requirements, production quantity, testing requirements, and delivery schedule.

Engineering Review Before Quotation

A turnkey quotation depends on the complete manufacturing scope rather than PCB dimensions and component count alone.

Before procurement and production planning, our engineering team reviews the available manufacturing documentation for requirements that may affect sourcing, PCB fabrication, assembly, programming, testing, or production.

Typical review items include:

BOM Completeness & Manufacturer Part Numbers
Gerber Data
PCB Fabrication Requirements
PCB Stack-Up, if applicable
Pick & Place Data
Assembly Drawings
Component Polarity & Orientation
Component Availability
Long-Lead-Time Components
Obsolete / EOL / NRND Components
DFM & Panelization
Programming Requirements
ICT / Functional Test Requirements
Special Manufacturing Processes

If documentation, sourcing, or manufacturing issues are identified, they can be reviewed before materials are purchased and production is scheduled.

Component Sourcing & BOM Management

Component sourcing is a core part of turnkey PCB assembly.

Our sourcing and engineering teams review BOM information and component availability before procurement.

The review may include:

Manufacturer Part Number Verification
Authorized Distributor Availability
Customer Approved Vendor List (AVL)
Customer Approved Manufacturer List (AML)
Component Lifecycle Status
Obsolete / EOL Components
NRND Components
Long-Lead-Time Components
MOQ / SPQ Requirements
Supply-Constrained Components
Alternate Component Availability
Material Traceability
Customer-Supplied Components

Components can be sourced through authorized distributors, approved suppliers, and customer-designated vendors according to project requirements.

If a specified component has a sourcing issue, available options can be reviewed with the customer before procurement.

BOM Alternatives & Component Review

When component availability, lifecycle status, cost, or lead time creates a sourcing issue, potential alternative components or second-source options can be evaluated.

Depending on the component, review may include:

Electrical Specifications
Package & Footprint
Pinout Compatibility
Voltage & Current Ratings
Temperature Requirements
Thermal Requirements
Availability & Lead Time
Manufacturer Lifecycle Status
Application Requirements
Firmware Impact, where applicable

Standard passive components may have equivalent sourcing options where the required specifications can be maintained.

ICs, power devices, connectors, and other design-sensitive components may require additional engineering review.

Alternative components or materials are not substituted without customer review and approval.

Where no suitable pin-to-pin alternative is available, required engineering changes can be evaluated separately depending on the project and available design files.

PCB Fabrication

PCB fabrication can be coordinated as part of the turnkey manufacturing program.

Depending on the project, we can support PCB requirements including:

Single-Sided, Double-Sided & Multi-Layer PCB
Rigid & Rigid-Flex PCB
Heavy Copper PCB
High-Tg PCB
Controlled Impedance PCB
Customer-Defined PCB Stack-Up
Surface Finish Requirements
Panelization Requirements

PCB fabrication requirements such as material, thickness, copper weight, surface finish, stack-up, controlled impedance, drill specifications, and other customer-defined requirements are reviewed according to the project.

PCB fabrication is coordinated with component procurement and assembly planning under the same manufacturing program.

SMT, THT & Mixed-Technology Assembly

Our Taiwan manufacturing operation supports SMT, through-hole, and mixed-technology PCB assemblies.

Assembly capabilities include:

01005 Passive Components
Fine-Pitch ICs
BGA
QFN
LGA
CSP
Bottom-Terminated Components
Single-Sided & Double-Sided SMT
Manual Through-Hole Assembly
Wave Soldering
Selective Soldering
Press-Fit Components
Connector & Terminal Assembly

SMT and THT manufacturing processes are selected according to the PCB design, component requirements, soldering requirements, inspection requirements, and production quantity.

PCB Assembly Inspection & Quality Control

Inspection and quality control are applied according to the product and customer requirements.

Inspection and verification can include:

Incoming Material Verification
First Article Inspection (FAI)
Solder Paste Inspection (SPI)
Automated Optical Inspection (AOI)
X-Ray Inspection
In-Process Inspection
In-Circuit Testing (ICT)
Functional Testing (FCT)
Final Quality Verification
ESD / MSD Control

X-Ray inspection can be used for BGA and other components with hidden solder joints where required.

Inspection methods are selected according to PCB design, component packages, manufacturing requirements, and customer specifications.

Programming & Functional Testing

Programming and testing requirements should be defined during quotation whenever possible.

Depending on the product, support can include:

IC / MCU Programming
Firmware Loading
Firmware Version Control
Power-On Verification
In-Circuit Testing (ICT)
Functional Testing (FCT)
Customer Test Fixture Integration
Customer-Defined Test Procedures

For customer-specific functional testing, test procedures, firmware versions, pass / fail criteria, fixtures, required measurements, and test equipment should be identified before production.

Where required, customer-specific test fixture development can be evaluated separately according to the available test procedures, product specifications, interfaces, expected production requirements, and test scope.

Manufacturing Capabilities

Our Taiwan manufacturing facility supports prototype, NPI, pilot, and repeat-production PCB assembly programs.

Manufacturing at a Glance

5 SMT Production Lines
1 THT Assembly Line
28,500 sq.ft Manufacturing Facility
Up to 6.2 Million Component Placements per Day
Maximum PCB Size: 500 × 500 mm
SPI, AOI & X-Ray Inspection
ICT & Functional Testing
Box Build
RoHS Manufacturing Support
ESD / MSD Control

→ View Equipment List

Prototype, NPI & Repeat Production

We support:

Prototype & Engineering Builds
NPI Builds
Pilot Production
High-Mix / Low-Volume Production
Production Ramp-Up
Repeat Production
Controlled Mid-Volume Production

During prototype and NPI stages, engineering, sourcing, manufacturing, programming, and testing requirements can be reviewed before production quantities increase.

For established products, production planning is based on the approved manufacturing documentation, order quantity, forecast demand, component availability, testing requirements, and delivery schedule.

Typical Turnkey PCB Assembly Workflow

1. Engineering Review
Review BOM, Gerber data, assembly documentation, manufacturability, programming, testing, and other project requirements.

2. Component Sourcing & Procurement
Verify BOM availability, identify sourcing issues, review approved alternatives where required, and procure components.

3. PCB Fabrication
Manufacture the PCB according to the approved fabrication requirements.

4. PCB Assembly
Perform SMT, through-hole, or mixed-technology assembly according to the product requirements.

5. Inspection, Programming & Testing
Perform applicable SPI, AOI, X-Ray, programming, ICT, functional testing, and customer-defined verification.

6. Final Quality Verification
Complete final inspection and verify applicable manufacturing and customer requirements before shipment.

7. Packaging & Delivery
Package finished products and coordinate shipment according to customer requirements.

Applications We Support

Our turnkey PCB assembly services support OEM products including:

Industrial Controllers
Industrial Automation Equipment
Power Supplies
Battery Chargers
Battery Management Systems (BMS)
Power Electronics
Energy Storage Systems
IoT & Embedded Devices
Communication Equipment
Networking Equipment
Medical Electronics
Test & Measurement Equipment
Other OEM Electronic Products

Turnkey PCB Assembly FAQ

What is included in turnkey PCB assembly?

Depending on the project, turnkey PCB assembly can include PCB fabrication, component sourcing, SMT/THT assembly, inspection, programming, testing, box build, and other agreed manufacturing requirements under one coordinated program.

What information is required for a turnkey PCB assembly quotation?

Typical RFQ information includes a BOM with manufacturer part numbers, Gerber files, PCB specifications, Pick & Place data, assembly drawings, required quantities, and applicable programming or functional testing requirements.

Do you support turnkey, partial-turnkey, and consigned PCB assembly?

Yes. For turnkey projects, we manage the agreed PCB and component procurement requirements. For partial-turnkey projects, customers can provide selected materials. For consigned projects, customers can provide some or all production materials.

What happens if some BOM components are unavailable or EOL?

Our sourcing and engineering teams can review component availability, lifecycle status, lead time, approved manufacturers, and potential alternative or second-source components.

Alternative components or materials are not substituted without customer review and approval.

Do you provide programming and functional testing?

Yes. Depending on project requirements, support can include IC / MCU programming, firmware loading, power-on verification, ICT, functional testing, customer test fixture integration, and customer-defined test procedures.

Request a Turnkey PCB Assembly Quote

If you are evaluating a turnkey PCB assembly manufacturer in Taiwan, send us your available manufacturing files and project requirements for engineering review and quotation.

Our engineering and sourcing teams will review the available information and advise if additional documentation is required before quotation.

Email: sales@leaderelec.com.tw

NDA available upon request.

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