Explore our high-precision, industry-certified printed circuit board assemblies engineered for critical global applications.
How advanced engineering, automation, and global compliance are shaping the next generation of Electronic Manufacturing Services (EMS).
The global electronics landscape is undergoing a paradigm shift. With the rise of 5G communications, AI-driven edge computing, electric vehicles (EVs), and advanced medical diagnostics, the requirements for printed circuit board (PCB) design and assembly have reached unprecedented levels of complexity. Modern boards must handle higher signal speeds, manage thermal dissipation efficiently, and fit into increasingly compact enclosures.
China's PCB design services and factories have transitioned from low-cost assembly shops to high-tech innovation hubs. Today, leading manufacturers integrate advanced Design for Manufacturability (DFM) and Design for Testability (DFT) methodologies early in the design cycle. This proactive approach minimizes signal integrity issues, reduces electromagnetic interference (EMI), and ensures that prototypes transition seamlessly into high-yield mass production.
Shenzhen STHL is a high-quality provider of electronics manufacturing services (EMS) in China. We serve customers worldwide along the whole industry chain including PCB layout, components sourcing, PCB fabrication, PCBA assembly, cable assembly, box build assembly and comprehensive testing services.
It was established in 2006, with 20 years of experience in electronics contract assembly manufacturing. Currently, STHL has 220+ staff members. Our 10,000 sqm facilities include 7 SMT assembly lines, 2 DIP/THT lines, 2 function testing lines and 2 finished device assembly lines.
At STHL, we provide electronics assembly services for energy power, communications, automotive, medical, consumer electronics, computers & storage, safety & security, commercial and industrial products. Our customers mainly from USA, Germany, Italy, UK, Poland, New Zealand, Argentina, Brazil, Turkey, Korea, Thailand, and the other 90 regions of the world.
As an IATF16949, ISO9001, ISO14001, and ISO13485 certificated electronics assembly manufacturer, we produce products exactly comply with RoHS standard and quality guarantee. Based on our excellent engineering and production capacities in technical areas such as materials analysis & storage, advanced equipment, reliability testing (AOI, X-RAY, ICT test and function test), high effective SMT and THT assembly, we are recognized as a long-term reliable PCBA vendor by more and more customers worldwide.
Our state-of-the-art production lines handle everything from ultra-fine pitch surface mount components to robust through-hole insertions.
We can handle a wide range of advanced components, including:
But our commitment to quality goes beyond component expertise. We utilize advanced inspection techniques, including AOI (Automated Optical Inspection) and X-Ray inspection, to guarantee flawless assembly. X-Ray inspection is particularly critical for BGAs and QFNs where solder joints are hidden beneath the component body, allowing us to detect voids, bridging, and alignment issues that optical systems cannot see.
STHL PCBA also excels in Through-Hole Technology (THT) assembly. Our services encompass:
By combining SMT and THT capabilities under one roof, we provide comprehensive mixed-technology assembly services, optimizing production flow and reducing lead times for complex industrial and power electronics.
From initial design review to final packaging, we manage the entire lifecycle of your electronic products.
STHL operates 7 automated PCB assembly lines for both prototype and mass production. Advanced SMT ensures precise component placement and quality. Skilled technicians provide efficient THT assembly and RoHS-compliant lead-free soldering.
STHL PCB fabrication service produces high-quality, reliable printed circuit boards from simple singles to complex multi-layers, from flex PCB to rigid-flex PCB, we use premium materials and controlled processes to meet precise specifications.
STHL offers global electronic component sourcing and supply chain solutions. Our vast supplier network and expertise ensure access to genuine, certified parts, mitigating risks of counterfeits, allocation, and long lead times to secure your production schedule.
With the precision manufacturing of cable assembly components including handles, retention systems, connectors, and shielding in a wide range of materials and finishes, we have performed many successful cable assemblies for many customers from various industrial applications.
Making your projects at STHL from SMT assembly to box build assembly is very cost-effective and fast to market. Covering everything from putting a PCBA into the enclosure with all functions testing to a complete product assembly packaged and ready for delivery to your customers, we can supply the full support.
STHL conducts functional testing (FCT) to verify product performance, preventing defects such as circuit issues, missing or incorrect components. This ensures delivered products are stable and fully qualified.
How we mitigate risk, secure authentic components, and optimize logistics for international buyers.
Global procurement teams face significant challenges, including volatile lead times, component obsolescence, and the threat of counterfeit parts. To address these concerns, STHL has established a robust supply chain management system. We work directly with original component manufacturers (OCMs) and authorized distributors (such as Arrow, Avnet, Digi-Key, and Mouser) to guarantee the authenticity of every part we source.
Our dedicated procurement team monitors market trends in real-time, identifying potential shortages before they impact your production schedule. When a component is flagged for obsolescence, our engineering team works closely with clients to source drop-in replacements or suggest design modifications that future-proof the product.
Tailored engineering and manufacturing solutions designed to meet the strict regulatory standards of diverse sectors.
We manufacture critical medical assemblies, including ventilators, pulse oximeters, and operating room monitoring systems. Our processes comply with ISO 13485 standards, ensuring the highest level of traceability, process control, and risk management required for life-supporting equipment.
With IATF 16949 certification, we support the automotive sector with high-reliability assemblies for on-board charging equipment, power management systems, and advanced driver-assistance systems (ADAS). Our production lines feature automated optical and X-ray inspection to guarantee zero-defect manufacturing.
From power quality analyzers to electric forklift controllers, we build ruggedized PCBA solutions capable of withstanding harsh industrial environments. We utilize heavy copper PCBs, conformal coating, and thermal interface materials to ensure long-term durability.
Investing in advanced manufacturing technologies to support next-generation electronic designs.
As electronic designs become more complex, manufacturing processes must evolve. STHL is actively investing in smart factory initiatives, integrating IoT sensors across our SMT lines to monitor machine performance, reflow oven temperature profiles, and solder paste deposition in real-time. This data-driven approach allows us to perform predictive maintenance, minimize downtime, and maintain tight process control.
Our technical roadmap includes the expansion of our HDI (High-Density Interconnect) capabilities, supporting smaller trace widths and spaces (down to 3 mil/3 mil) and advanced microvia stacking. This will enable our customers to design even smaller, more powerful devices for IoT, wearable tech, and high-speed computing applications.
Get answers to common questions regarding our PCB design services, manufacturing capabilities, and quality assurance processes.
Discover our diverse manufacturing capabilities across medical, industrial, consumer, and lighting industries.
STHL PCBA
