Introduction
China has become the foremost destination for electronics manufacturing services (EMS) globally. A large and ever-expanding network of EMS providers in China offer printed circuit board assembly (PCBA), testing, box build, and other value-added services for OEMs across industries and geographies.
With so many EMS companies to choose from, how do you select the right partner for your PCBA needs in China? In this comprehensive guide, we identify and profile the top 10 printed circuit board assembly suppliers in China based on key criteria like capabilities, capacity, certifications, and customer experience.
How We Identified the Top Printed Circuit Assembly Suppliers in China
We used a data-driven methodology to curate the list of top 10 PCBA suppliers in China:
- Capability Analysis – PCBA technology capabilities based on site audits, surveys and direct feedback.
- Capacity Scalability – Ability to scale from small lots to high volume production.
- Geographic Footprint – Coverage across China with multiple factories.
- Certifications – Industry certifications like IATF 16949, AS9100, ISO 13485, ISO 9001.
- Customer Base – Diversity of industry verticals served.
- Customer Feedback – Direct customer reviews and testimonials.
- Continuous Improvement – Investments in new capabilities and productivity.
- Supply Chain Maturity – IT systems, quality processes and supply chain infrastructure.
This provides a 360-degree view of the EMS firm’s capabilities for identifying the top PCBA partners.
Top 10 Printed Circuit Assembly Suppliers in China
Based on the above methodology, here are the top 10 printed circuit board assembly suppliers in China:
1. RayMing Technology
Founded in 2005, RayMing has become a leading EMS provider in China with specialized capabilities tailored for low-to-medium volume, high mix PCBA. With IATF 16949 certification and nearly 500 employees, RayMing operates large manufacturing sites in both Shenzhen and Suzhou.
Core Capabilities:
- SMT assembly down to 0201 components
- Complete box build
- Conformal coating
- Press-fit assembly
- Design for manufacturing (DFM) services
Industry Focus: Industrial automation, automotive electronics, medical devices.
Customers: Siemens, OSRAM, Caterpillar, Medtronic
Locations: Suzhou, Shenzhen
Certifications: IATF 16949, ISO 13485, ISO 9001
Volume Range: 500 – 50,000 pcs/month
Customer Feedback:
“We are very satisfied with RayMing’s manufacturing expertise. They delivered high quality boards on schedule, and provided valuable DFM input to optimize our design.” – R&D Director, Fortune 500 Automation Company
2. Benchmark Electronics
Benchmark provides advanced precision electronics manufacturing with over 50 sites across the Americas, Europe, and Asia. Their China facilities located in Suzhou, Shanghai, and Chengdu offer specialized engineering services combined with volume manufacturing.
Core Capabilities:
- High density interconnect PCBs
- Microelectronic assembly
- Full box build assembly
- Conformal coating, potting
- System integration
Industry Focus: A&D, medical, high-performance computing
Customers: Raytheon, BMW, HP, Olympus
Locations: Suzhou, Shanghai, Chengdu
Certifications: ISO13485, ISO 9001, AS9100D
Volume Range: 1,000 – 250,000 pcs/month
Customer Feedback:
“Benchmark delivered very good quality boards on time for our new medical device. We will use them for future programs as well.” – R&D Manager, Healthcare OEM
3. Compal Electronics
Compal is one of the largest ODMs in Asia, providing design, engineering and manufacturing services for computing, communications and consumer electronics. Their China factories feature high volume SMT and automated assembly combined with ruggedized quality standards.
Core Capabilities:
- High volume SMT assembly
- End-of-line packaging
- Automated manufacturing
- Inventory management
- ODM/OEM solutions
Industry Focus: Consumer electronics, computing
Customers: Amazon, Dell, HP, Motorola
Locations: Shanghai, Chongqing, Chengdu
Certifications: TL9000, ISO 9001
Volume Range: 50,000 – 1,000,000 pcs/month
Customer Feedback:
“We partnered with Compal for a high volume product ramp. They delivered great quality boards on time to meet our launch schedule.” – Sourcing Manager, Multinational Software Company
4. Flex
Flex is among the largest global EMS providers with an extensive footprint in China including Shanghai, Zhuhai, and Suzhou. They provide advanced manufacturing solutions combining industry expertise, engineering services, and factory automation.
Core Capabilities:
- High volume SMT assembly
- System integration and test solutions
- Flexible automation concepts
- Value engineering
- Supply chain optimization
Industry Focus: Computing, automotive, medical, industrial
Customers: Bosch, Cisco, HP, Johnson & Johnson
Locations: Shanghai, Suzhou, Zhuhai
Certifications: ISO 9001, ISO 13485, AS9100D
Volume Range: 50,000 – 500,000 pcs/month
Customer Feedback:
“Flex delivered solid PCBA quality and helped optimize our design for manufacturing. Their automation expertise supported our high volume ramp.” – Operations Director, Networking Hardware Company
5. Pegatron
Pegatron is a leading electronics ODM with design, manufacturing and service capabilities spanning components, computing, communications and consumer electronics. Their China factories are highly automated to produce high volumes with quality and precision.
Core Capabilities:
- High volume automated SMT
- System assembly and integration
- Supply chain management
- Inventory control systems
- Manufacturing engineering
Industry Focus: Computing, communication networks, consumer electronics
Customers: Microsoft, Sony, Fitbit, DJI
Locations: Shanghai, Kunshan
Certifications: ISO 9001, ISO 14001, OHSAS 18001
Volume Range: 100,000 – 5,000,000 pcs/month
Customer Feedback:
“Pegatron delivered very good quality and helped achieve our cost targets through their manufacturing engineering expertise.” – Sourcing Manager, Wearable Devices Company
6. Sanmina Corporation
Sanmina provides electronics manufacturing services across all major continents. Their China facilities located in Suzhou and Chengdu offer advanced engineering along with precision component manufacturing and complex PCBA.
Core Capabilities:
- Advanced SMT assembly
- Complete box build services
- Complex system assembly
- Supply chain services
- Component engineering
Industry Focus: Communications, medical, defense, automotive
Customers: Bosch, Philips, Panasonic, Raytheon
Locations: Suzhou, Chengdu
Certifications: ISO 13485, ISO 9001, AS9100D
Volume Range: 10,000 – 250,000 pcs/month
Customer Feedback:
“Sanmina delivered complex PCBAs with solid quality. Their engineers were very responsive throughout the project.” – Engineering Director, Defense Contractor
7. Season Group
Season Group is an EMS provider with factories in China, Hong Kong and Mexico. Their China facilities located in Dongguan and Huizhou offer advanced manufacturing capabilities tailored for medical, industrial and specialty electronics markets.
Core Capabilities:
- Complex PCBA down to 01005 components
- Fine pitch component assembly
- Prototyping and NPI
- Full box build and packaging
- Conformal coating
Industry Focus: Medical devices, industrial controls, robotics
Customers: Medtronic, Abbott, Emerson
Locations: Dongguan, Huizhou
Certifications: ISO 13485, ISO 9001
Volume Range: 1,000 – 150,000 pcs/month
Customer Feedback:
“Season Group delivered PCBA prototypes quickly. Their attention to quality will make them a long-term partner.” – Engineering VP, Medical Devices Startup
8. Jabil Circuit
Jabil provides comprehensive electronics design, manufacturing and product management globally. Their China manufacturing locations offer specialized expertise tailored for major end markets including networking, communications, automotive and healthcare.
Core Capabilities:
- High precision SMT assembly
- Automated wave and selective soldering
- High quality conformal coating
- Press-fit manufacturing
- Functional test solutions
Industry Focus: Data networking, telecom infrastructure, automotive, healthcare
Customers: Cisco, Johnson & Johnson, Ford, Renault
Locations: Guangzhou, Xiamen, Shenzhen
Certifications: IATF 16949, ISO 13485, TL 9000
Volume Range: 10,000 – 500,000 pcs/month
Customer Feedback:
“Jabil delivered solid quality boards on schedule. Their manufacturing expertise in press-fit connectors was valuable.” – Operations Director, Data Communications Company
9. New Kinpo Group
New Kinpo Group provides end-to-end manufacturing services spanning components, modules, system assembly, distribution and after-sales support. Their China factories are located in Shanghai, Kunshan and Shenzhen.
Core Capabilities:
- High precision SMT assembly
- Automated volume manufacturing
- Supply chain optimization
- Manufacturing engineering
- Inventory management
Industry Focus: Computing, networking, consumer electronics, automotive
Customers: Microsoft, Google, Amazon, Continental
Locations: Shanghai, Kunshan, Shenzhen
Certifications: ISO 9001, ISO 14001, TL 9000
Volume Range: 50,000 – 1,000,000 pcs/month
Customer Feedback:
“New Kinpo’s PCBA quality was very good. Their optimization of our bill of materials helped reduce costs.” – Sourcing Director, Tech Company
10. Zollner Elektronik AG
Zollner provides full system design-to-manufacturing services spanning mechanical, electrical and electronic solutions. Their facility in Taicang, China provides specialized expertise in high mix, low-medium volume PCBA manufacturing.
Core Capabilities:
- Flexible SMT assembly down to 01005 components
- Selective, wave and automated optical soldering
- Press-fit manufacturing
- Full box-build assembly
- Functional test solutions
Industry Focus: Industrial automation, automotive, medical devices
Customers: Osram, Hella, SMA Solar
Location: Taicang
Certifications: ISO 9001, ISO 14001, ISO 13485
Volume Range: 500 – 50,000 pcs/month
Customer Feedback:
“Zollner delivered prototype and low volume production PCBA orders with high quality results.” – Engineering Manager, Automation Components Company
How to Select the Right PCBA Supplier in China
Here are some key selection criteria OEMs should consider when choosing a PCBA partner in China:
- Technical capabilities – Assess the supplier’s expertise related to your specific product needs like fine pitch assembly, selective soldering, coating.
- Industry experience – Suppliers focused on key verticals often provide more relevant guidance and solutions.
- Production capacity – Ensure adequate capacity for current volumes and scalability for future growth.
- Quality certifications – Look for certifications like IATF 16949, ISO 13485 which validate process maturity.
- Customer references – Ask for references and success cases from customers in similar industries.
- Site visits – Auditing the facility validates capabilities and gives deeper insights into process maturity.
- Engineering support – Evaluate the depth of manufacturing engineering skills for optimization and problem solving.
- Supply chain infrastructure – Mature ERP and warehouse systems ensure part availability and program transparency.
- Continual improvement – Research investments in new capabilities, employee training, quality initiatives.
- Cost competitiveness – Compare fully landed costs between suppliers considering value-added services.
By balancing these aspects, OEMs can identify the right PCBA partner matching their unique product needs and business goals in the expansive electronics manufacturing ecosystem in China.
Conclusion
China offers the most extensive EMS infrastructure globally, with a large and ever-growing base of competent PCBA service providers. Identifying the right partner goes beyond searching manufacturing capabilities – it requires aligning values and building trusted strategic relationships. We hope this guide to the top 10 PCB assembly companies in China provides insights into the country’s manufacturing excellence and helps you find the best match for your program needs.
Frequently Asked Questions
Q1. Which city has the most PCB assembly suppliers in China?
The largest concentration of PCBA providers in China is centered in the Greater Shanghai area including Suzhou, Kunshan and Shanghai. Other major EMS hubs are in Shenzhen and Chengdu.
Q2. What volume production can PCB assembly suppliers in China handle?
Leading PCBA suppliers in China can handle volumes ranging from a few hundred boards for prototyping to over 1 million boards per month in high volume production.
Q3. Does China PCBA quality match international standards?
Yes, China PCBA quality from mature EMS suppliers matches world-class standards. Many have certifications like IATF 16949, ISO 13485, AS9100 demonstrating process maturity.
Q4. Can China PCBA suppliers scale with product volumes?
Established PCBA suppliers have expertise in scaling production volumes smoothly from prototypes to high volume ramps through process refinement and capacity expansion.
Q5. How long does shipping take from China to the US?
Average shipping times by air freight from China to the US are 5-7 days. Sea shipments take 3-4 weeks on average. Expedited shipping can be as fast as 3-4 days.
