SUDACNC provides full professional PCB Assembly (PCBA) manufacturing service with multiple automated dust-free ESD cleanroom production lines. We deliver complete circuit board assembly covering SMT surface mount, THT through-hole wave/selective soldering, IC firmware mass programming, multi-layer automated inspection, full functional testing, conformal coating and electromechanical box build integration. Our equipment supports ultra-miniature 0201 chips and 0.4mm fine pitch BGA/QFN/CSP high-density packaging, compatible with rigid FR4, flexible FPC, rigid-flex, HDI and aluminum metal core PCB substrates. Strictly follow IPC-A-610 Class II/III workmanship standards, RoHS lead-free process, with ISO9001, IATF16949 automotive and ISO13485 medical certification. We support two flexible cooperation modes: partial assembly (customer provides bare PCB & full BOM components) and full turnkey PCBA (factory handles design, PCB fabrication, component sourcing & assembly all in-house), seamlessly connected with our internal PCB design and PCB manufacturing workshops to realize closed-loop electronics hardware development.
Request PCB Assembly Quotation
Gerber, BOM, Schematic, Test Spec, Firmware Files Accepted
All design & BOM data protected by formal NDA confidentiality agreement
Class 100,000 anti-static cleanroom PCBA production facility
What Is PCB Assembly (PCBA)?
PCB Assembly, abbreviated as PCBA, refers to the complete manufacturing process of soldering electronic components onto bare printed circuit boards to form functional circuit boards. It mainly includes two core assembly technologies: SMT Surface Mount Technology for miniature surface devices, and THT Through-Hole Technology for large plug-in power components.
A complete PCBA workflow includes DFA manufacturability review, incoming material IQC inspection, solder paste printing, high-speed component placement, nitrogen reflow soldering, wave/selective soldering, multi-stage automated optical & X-Ray inspection, electrical ICT/FCT functional testing, firmware programming and optional protective conformal coating. Compared with scattered small assembly workshops, our integrated factory owns independent PCB production, assembly and testing lines, eliminates cross-supplier communication errors, realizes full batch component traceability via MES production system, and meets strict quality audit requirements of automotive, medical and industrial control electronic brands from prototype small batches to global mass shipments.
Six Closed-Loop Full-Process PCB Assembly Service Modules
Our PCB Assembly adopts standardized six-step closed-loop production workflow, covering pre-production DFA review, material management, core SMT/THT assembly, multi-dimensional testing, protection finishing and final packaging shipment. All production stations are connected to MES traceability system, each PCBA unit assigned unique serial number to record component batch, assembly station, inspection result and test data, fully satisfying automotive and medical industry strict batch audit requirements. We support two independent cooperation modes: partial assembly (customer supply bare PCB + complete BOM components) and full turnkey PCBA one-stop service (factory undertakes PCB fabrication, global component procurement and full assembly).
Unique Strengths Of Our In-House PCBA Cleanroom Lines
Dual SMT+THT Mixed Assembly Capacity: Simultaneously handle miniature surface chips and large power plug-in components on one production line
Full Automated Multi-Layer Inspection: SPI/AOI/X-Ray triple in-line inspection to eliminate hidden welding defects before reflow
Complete Electrical & Reliability Test Lab: ICT/FCT aging test chamber self-owned, no third-party testing outsourcing delays
Full MES Traceability System: Complete component batch & production record archiving for regulatory compliance audit
Electromechanical Integrated Matching Capacity: Docking internal PCB design, sheet metal and plastic injection molding workshops for full box build finished products
Six Core PCB Assembly Process Module Detailed Introduction
1. Pre-Production DFA Review & Component Sourcing
DFA Design for Assembly review of Gerber, BOM and schematic to identify assembly risks
Global authorized distributor component procurement, alternative cost-saving part recommendation
IQC incoming material inspection: component appearance, specification, MSL moisture sensitive level baking management
Component warehouse intelligent storage, FIFO advanced first out material picking management
2. SMT Surface Mount High-Speed Automated Assembly
Custom laser stencil production according to PCB pad layout, automatic solder paste printing
3D SPI solder paste volume & offset inspection before component placement
High-speed multi-functional pick-and-place machine for 0201 chips, 0.4mm BGA/QFN fine pitch IC mounting
Nitrogen protective reflow soldering, stable temperature curve for lead-free RoHS compliant process
3. THT Through-Hole Wave & Selective Soldering
Axial/radial component lead forming, automatic & manual plug-in insertion
Full wave soldering for mass through-hole boards, selective soldering for high-precision partial pin welding
Automatic excess lead trimming, post-wave IPQC visual inspection of solder joint quality
Special high-power transformer, relay and connector manual high-reliability soldering station
Lead-free RoHS standard nitrogen reflow; tin-lead solder available for special industrial orders
THT Supported Component Categories
Electrolytic capacitor, transformer, terminal block, power relay, axial/radial resistors
ESD Production Workshop Standard
Class 100,000 dust-free anti-static cleanroom full grounding & ion fan system
Assembly Workmanship Acceptance Standard
IPC-A-610 Class II general commercial / Class III high-reliability medical & automotive
Submit Gerber, BOM & Test Specification For Free PCBA DFA Review & Cost Quotation
Full Multi-Layer In-Line Inspection & Reliability Testing QC System
All PCBA batches implement full-process closed-loop inspection from solder paste printing to finished product delivery, every inspection data permanently archived to meet automotive and medical full traceability audit standards.
1. SPI 3D Solder Paste Inspection: Real-time scan paste thickness, offset, insufficient/excessive printing volume before placement, eliminate printing root defects in advance.
2. 3D AOI Automated Optical Inspection: Full surface scan after reflow soldering, automatically identify missing chips, reversed polarity, offset, tombstone, bridging and cold solder joints, defective boards marked for rework sorting.
2D X-Ray penetrates PCB substrate to detect hidden solder joints under BGA, QFN, LGA chips, capture internal voids, ball missing, bridging and cold solder defects invisible from the board surface, 100% full scanning for all PCBA carrying fine pitch IC packages.
ICT In-Circuit Test: Measure single-point resistance, capacitance, diode continuity, detect open/short circuit faults of each component; flying probe test suitable for small prototype batches without fixture development cost.
FCT Functional Circuit Test: Custom test fixture simulates real power supply, communication, sensor and display working environment, verify all firmware logic and functional modules pass before mass shipment.
Support temperature cycling (-40℃ ~ +125℃), constant temperature & humidity aging, mechanical vibration shock test, long-term power-on burn-in aging test for automotive, medical and industrial high-reliability PCBA batches, complete formal aging test report output upon customer request.
Custom Test Fixture Development & Full Batch Test Report Add-On Service
IC Mass Programming, Conformal Coating Protection & PCB Post-Assembly Finishing
Support offline batch programming of MCU, FPGA, Flash memory, Bluetooth/WiFi/LoRa wireless communication modules, complete firmware version verification and encrypted program storage management, avoid program leakage risk, mass simultaneous programming to improve production efficiency for large-volume orders.
Acrylic Coating: Low cost, easy rework, good moisture & dust resistance, widely used for indoor consumer and industrial control PCBA.
Polyurethane Urethane Coating: High abrasion & chemical corrosion resistance, suitable for outdoor automotive electronic modules exposed to harsh working environment.
UV Cure Coating: Instant UV light curing, high production speed, thin uniform film for high-density miniaturized IoT circuit boards.
Parylene Coating: Ultra-thin molecular uniform film, excellent waterproof insulation performance, high-end medical wearable and precision sensor PCBA preferred protection process.
Custom silicone masking fixture to shield test points, connector pins, IC sockets and metal contact areas during coating spraying, prevent coating film covering functional contact surfaces leading to assembly and electrical connection failure; ultrasonic cleaning removes solder residue and surface oil contamination before coating to ensure film adhesion stability.
Custom Conformal Coating Thickness & Masking Process Solution For Harsh Environment PCBA
Critical DFA Design For Assembly Rules To Reduce PCBA Rework Rate
PCB Layout Assembly Feature
PCBA Manufacturability Mandatory Design Rule
0201 Chip Pad Spacing Clearance
≥0.15mm gap to prevent solder bridging short circuit during reflow soldering
BGA/QFN Minimum Pad Pitch
≥0.4mm; finer pitch requires dedicated ultra-precision SMT production line
PCB Edge Component Clearance Margin
≥3mm reserved space for SMT conveyor fixture clamping during production
Add 4-spoke thermal relief to avoid cold solder joint and tombstone component failure
Free Pre-Production DFA Manufacturability Review Before PCBA Mass Production
Core Industry Application Scenarios For Our PCBA Assembly Service
Automotive Electronics (IATF16949 Certified)
BMS battery management PCBA, vehicle sensor control boards, car lighting driver modules, infotainment mainboards, comply with AEC-Q100 component reliability standards, full temperature cycling & vibration aging testing required before delivery.
Medical Device Electronics (ISO13485 Certified)
Wearable vital sign monitoring PCBA, diagnostic equipment control circuit boards, portable medical sensor assemblies, full component batch traceability, cleanroom anti-pollution assembly process, FDA & CE IVDR compliance support.
Industrial Control & IoT Smart Hardware
PLC main control PCBA, industrial gateway high-speed communication boards, WiFi/Bluetooth IoT sensor circuit assemblies, power drive modules, optional conformal coating protection for long-term harsh factory workshop environment operation.
Consumer & Communication Electronics
Smart home controller PCBA, wearable mini HDI circuit boards, audio power amplifier assemblies, 5G small signal communication modules, high-speed mass SMT line for low-cost large-volume standardized consumer hardware production.
Custom PCBA Assembly Manufacturing Solutions For Your Industry Electronic Hardware Projects
We have independent dedicated prototype SMT production line to support flexible order volume: 5–200pcs rapid prototype small batches (3–7 working days lead time), medium volume 500–50,000pcs, large mass production over 100,000pcs, no minimum order quantity limit for prototype verification batches.
Partial PCBA Assembly: Customer provides finished bare PCB and all complete BOM components, factory only completes SMT/THT assembly and basic AOI/ICT testing, customer takes charge of component purchasing and PCB fabrication supply chain risks. Full Turnkey PCBA: Factory undertakes PCB manufacturing, global component sourcing, full assembly, testing and coating packaging all processes, single vendor unified quality responsibility and schedule control, suitable for startups and new product NPI projects without stable supply chain teams.
Rapid prototype 5–200pcs simple 2-layer low-speed PCBA: 3–7 working days; medium batch 500–20,000pcs mixed SMT/THT board with FCT test: 7–14 days; mass volume over 50,000pcs including conformal coating and aging reliability test: 14–25 working days (subject to component supply lead time).
ISO9001 general quality management system, IATF16949 automotive electronics special manufacturing certification, ISO13485 medical device production system, RoHS lead-free environmental compliance, CE/FCC export safety certification, IPC-A-610 Class II/III high-reliability electronic assembly workmanship standard.
Partial PCBA Assembly VS Full Turnkey PCBA One-Stop Service Comparison Table
Swipe horizontally to view full table columns
Comparison Item
Partial PCBA Assembly Only
Full Turnkey PCBA One-Stop Service
Responsible Production Scope
Only SMT/THT soldering assembly + basic AOI/ICT inspection; bare PCB and all electronic components provided by customer self-sourcing
DFA review, PCB fabrication, global component sourcing, SMT/THT assembly, multi-stage testing, conformal coating, box build packaging full closed-loop manufacturing
Customer Workload & Coordination
Heavy workload, customer needs to separately purchase bare PCB, source, inspect and store all BOM components, coordinate multiple suppliers for delivery schedule
Minimal customer coordination work, only provide Gerber + BOM design files, factory handles all supply chain and production scheduling coordination
Supply Chain Risk Control
Component shortage, PCB process defect and incoming material quality risks all borne by customer self-sourcing side
No component markup fee, suitable for large mature enterprises with stable long-term component procurement teams
Bulk component bulk purchasing discount, unified logistics and labor overhead cost integration, save 15~30% overall hardware development cost for small & medium brands
Quality Defect Responsibility Attribution
Factory only liable for assembly welding defects; PCB raw board and component quality issues need customer to negotiate with respective suppliers separately
Single factory full end-to-end quality liability, all defects including PCB, component, assembly and testing unified rectification without cross-supplier dispute coordination
Suitable Customer & Project Scenarios
Large mature electronic manufacturers with professional procurement and PCB purchasing departments, fixed long-term stable supply chain channels
Startup hardware brands, new product NPI prototype development, small-medium IoT/medical/automotive OEM enterprises without complete electronic supply chain teams
Our Factorys
CNC Machine Shop
Established:2015
Number of Machines:500 Machines
Location:ShenZhen
Sheet Metal Factory
Established:2019
Number of Machines:150 Machines
Location:ShenZhen
Jnjection Molding Factory
Established:2018
Number of Machines:350 Machines
Location:FoShan
3D Printing Factory
Established:2015
Number of Machines:300 Machines
Location:ShenZhen
Vacuum Casting Factory
Established:2013
Number of Machines:220 Machines
Location:DongGuan
Die Casting Factory
Established:2017
Number of Machines:100 Machines
Location:ShenZhen
SUDACNC Trusted Global Partner
We are your trusted manufacturing partner. Precision Machining and Efficient Management Delivery of High-Accuracy Global Parts. We guarantee consistent quality and transparency with punctual and reliable lead times.
We are with you every step of the way, from validating a design to mass production.
30M+
Network-wide parts produced
5,000+
Companies served
5,200+
Combinations of material, process, finish
options
30+
Supply regions to mitigat e risk & enhance delivery speed
Metal and Plastic Production Solutions
SUDACNC’s digital manufacturing marketplace is your one-stop solution for production. Our team is the perfect solution for your product manufacturing needs with our staff of technical experts, ease of our secure quoting platform, and global manufacturing capacity.
SUDACNC offers competitive pricing and lead times on plastic injection molding, die casting, metal stamping, metal extrusion, plastic extrusion, sheet metal, laser cutting, waterjet cutting, laser tube cutting, and tube bending services. Start your quote or contact us today to begin.
Choose Your Optimal Price and Lead Time
The SUDACNC Instant Quoting Engine® makes it easy to upload a CAD file and compare prices and lead times in just a few clicks. With thousands of manufacturing suppliers in all 50 U.S. states and more than 20 countries, SUDACNC’s extensive network gives you options to choose the shipping timeline and price that fit your business and budget.
SUDACNC offers price matching and a 30-day price guarantee on quotes, giving you peace of mind that you’re getting the best price. When ordering prototypes — originals or models of parts that are intended exclusively for non-commercial purposes — the price shown at checkout includes tariffs. Shipping is also included, as long as your package is standard-size.
Our Works
Our Works-area
Our Works 2
Our Works 3
Our Works 4
Our Works 5
Our Works 6
Our Works 7
Our Works 8
Our Works 9
Our Works 10
Our Works 11
Our Works 12
Our Works 13
SUDACNC Four Workflow Phases
From start to finish, our process is built for speed and clarity. Each step is transparent, keeping you in control. The result: precision results delivered on time.
Real-Time Quotes
Confirm transparent price structures, timelines, and DFM visibility in minutes, with the SUDACNC quoting engine supporting optimal strategic decisions. Upload your CAD files to reduce time spent in quoting cycles.
Quality Assurance
SUDACNC enables you to access a single, streamlined platform for managing versatile professional collaborative relationships with certified suppliers and diverse manufacturing capabilities, allowing you to scale production to meet unlimited volume requirements.
Deep Manufacturing Network
Every part of SUDACNC goes through rigorous inspection standards to ensure that we meet all your dimensional, cosmetic, and performance needs and requirements.
Industry-Focused Expertise
SUDACNC works across multiple industries, including aerospace, automotive, medical, robotics, consumer, and industrial machinery, delivering consistent quality in highly demanding projects.
All-in-One Your Reliable Manufacturing Partner
Design&Engineering Support
Rapid Prototyping
Production and Manufacturing
Quality control and distribution
Design and Engineering Support
Our work begins with understanding your design with engineering clarity. Knowing that the starting point of every successful product is understanding the engineering aspect, we work with you to comprehend design needs, analyze the specifications, and make manufacturable parts. Our early risk assessments streamline revisions, contain costs, and deal with ever-decreasing performance variability.
Practical DFM Comments to Support Design Decision Improvementss
Material Suggestions Based on Your Application
Engineering Assistance to Boost Efficiency and Longevity
Rapid Prototyping
Change concepts into real-life components fast and with ease. Rapid Precision services enable you to validate your design, test its functionality, and work out any remaining details before entering the production phase, allowing complete design confidence. Directly accompanying any design stage, fast production welcomes you to the design stage without demand to sacrifice precision.
Quick prototypes to perform experiments.
Prototypes for Form, Fit, and Function Validation
Prototyping is Perfect for Design Validation, Demonstration, and Initial Production Stages.
Production and Manufacturing
When your design is production-ready, we make the transition to production seamlessly. Supporting low, medium, and high-scale production, we maintain the same quality, repetition, and precision in each manufacturing run. Adaptable workflows allow for smooth production transitions as demand increases.
Encompassing all aspects of manufacturing
Consistency and repeatability across all ranges of production
Versatile manufacturing capabilities
Quality control and distribution
The meticulous nature of our work carries through all aspects of our business. Each component undergoes a thorough review to meet the required specifications and standards to be qualified for shipping. Following our extensive and streamlined order delivery process, we guarantee our customers receive parts that are ready to be joined and utilized for intended purpose in a timely fashion, without exception.
Quality control aligned with ISO standards
Quality documentation with complete traceability
Accurate delivery to all parts of the world
Quality Assurance & Compliance
in Every Part We Manufacture
We stay true to industry standards that have to do with quality and safety, like ISO 9001:2015 and AS9100. We assess and check every part multiple times to ensure that inspections have been done thoroughly and that we can offer no exceptions to your needs.
ISO 9001 Certified
100% Quality Inspection
Premium Material Selection
What Makes SUDACNC Different from Others
Instant Smart Quoting
Get quick pricing and DFM insights to optimize designs and reduce costs.
Global Supply Network
Access our global manufacturing network for reliable solutions of all sizes.
Certified Quality Control
Strict inspection protocols for every part. We ensure 100% accuracy and high standards.
Fast Reliable Delivery
Punctual shipping for all custom orders. Your projects always stay on schedule.
Our rich project experience accumulation and pre-analysis before production enable us to consider comprehensively and provide the mostsuitable and economical solutions, to
ISO 9001 Certified
100% Quality Inspection
Premium Material Selection
Save Your Time
Our skilled engineers team and sales
team work close to make professionaland efficient communication with thecustomers, to save the time.
48-Hour Standard Delivery
Express 24-Hour Option
Real-Time Order Tracking
Responsible and efficient after-salesservice
We will absolutely take our responsiblityfor any potential part quality issue, andcommunicate and solve it timely to meetcustomer's demand.
Expert Technical Consultation
Custom Solution Development
Dedicated Support Specialists
What Our Clients Say
"Implementing their precision-engineered components has dramatically lowered our operational overhead. The technical support team provided exceptional guidance in tailoring the ideal setup for our specialized manufacturing floor."
— Emily Watson, Head of Manufacturing
"Faced with a sudden shortage on our main assembly line, their team expedited the critical components within a day, preventing catastrophic financial losses. Their agility and customer-first mindset make them a premier strategic partner."
— David Lin, Supply Chain Director
"The dimensional consistency of their CNC parts is flawless, which seamlessly integrated into our rigid Outgoing Quality Control protocol. We haven't had a single batch rejection since switching to their fulfillment services."
— Marcus Vance, Quality Assurance Manager
"Their end-to-end transparency and automated dispatch tracking have revolutionized how we manage our warehouse flow. It's rare to find a manufacturing vendor that pairs heavy industrial expertise with such agile digital efficiency."
— Sophia Zheng, Procurement Specialist
Ready to Experience the Difference?
Join hundreds of satisfied customers who trust us for quality, speed, and expertise.
