Explore our high-precision printed circuit board assemblies engineered for critical industrial, medical, and security systems.
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.
Established in 2006, STHL brings 20 years of experience in electronics contract assembly manufacturing. Currently, our team consists of 220+ highly skilled staff members. Our state-of-the-art 10,000 sqm facilities house 7 SMT assembly lines, 2 DIP/THT lines, 2 function testing lines, and 2 finished device assembly lines.
We provide electronics assembly services for energy power, communications, automotive, medical, consumer electronics, computers & storage, safety & security, commercial, and industrial products. Our global customer base spans the USA, Germany, Italy, UK, Poland, New Zealand, Argentina, Brazil, Turkey, Korea, Thailand, and over 90 other regions worldwide.
As an IATF16949, ISO9001, ISO14001, and ISO13485 certificated electronics assembly manufacturer, we produce products that comply strictly with RoHS standards and quality guarantees.
Delivering precision engineering for complex, high-density, and rugged electronics assemblies.
We handle a wide range of advanced components with extreme precision, ensuring reliable connections even in the most demanding environments:
Our commitment to quality goes beyond component expertise. We utilize advanced inspection techniques, including Automated Optical Inspection (AOI) and X-Ray inspection, to guarantee flawless assembly and structural integrity.
STHL PCBA also excels in Through-Hole Technology (THT) assembly, providing robust mechanical bonds for heavy-duty components:
How flexible substrate technologies are redefining the boundaries of hardware design and manufacturing.
The shift toward thinner, lighter, and more flexible devices requires substrates that can withstand thousands of bending cycles. We utilize advanced Polyimide (PI) and Polyester (PET) films down to 12.5μm thickness, enabling dynamic bending applications in foldables and medical wearables.
By eliminating connectors and ribbon cables, rigid-flex PCBs reduce weight, save space, and improve signal integrity. Our roadmap focuses on high-density interconnect (HDI) rigid-flex boards with microvias, enabling seamless integration for aerospace and high-end medical imaging systems.
Looking forward, we are investing in additive manufacturing research, including direct-write conductive inks. This technology allows circuits to be printed directly onto 3D surfaces, paving the way for structural electronics and smart skins in automotive and IoT applications.
End-to-end EMS solutions tailored to bring your electronic concepts to volume production.
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 customers across various industrial applications.
Consolidating your projects at STHL from SMT assembly to box build assembly is highly cost-effective and fast-to-market. Covering everything from putting a PCBA into the enclosure with full functional testing to a complete product assembly packaged and ready for delivery, we supply 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, fully qualified, and ready for field deployment.
Leveraging smart manufacturing, automated logistics, and real-time tracking to optimize production cycles.
In today’s volatile global market, supply chain resilience is just as critical as manufacturing precision. At STHL, we have transitioned our Shenzhen facility into a Smart Factory 4.0 ecosystem. By integrating Manufacturing Execution Systems (MES) with our ERP, we achieve full digital traceability for every component, from incoming inspection to final box build.
Our automated SMT lines utilize smart feeders and optical sensors to minimize changeover times and eliminate human error. This level of automation allows us to scale seamlessly from rapid prototyping to high-volume production runs without compromising quality or delivery timelines.
"By localizing component sourcing within China's premier electronics cluster and utilizing automated inventory management, we reduce component lead times by up to 30% compared to traditional EMS providers."
Tailored electronics manufacturing services addressing the unique regulatory and technical demands of key sectors.
We manufacture high-reliability PCBA for automotive control units, sensor modules, and EV power management systems. Our processes comply fully with IATF 16949 standards, ensuring zero-defect tolerance and long-term thermal stability.
From ECG monitors to operating room video systems, our medical PCBA services adhere to ISO 13485. We implement rigorous risk management, validation protocols, and cleanroom assembly practices to guarantee patient safety.
Supporting the global transition to smart grids and green energy, we assemble robust PCBAs for solar inverters, smart meters, and industrial automation controllers designed to operate in harsh outdoor environments.
Bridging the gap between design and manufacturing with international standards and direct engineering collaboration.
Navigating international regulatory frameworks can be challenging. STHL simplifies this by acting as your compliance partner in China. Our engineering team conducts comprehensive Design for Manufacturing (DFM) and Design for Testing (DFT) reviews before production begins, identifying potential yield issues or component bottlenecks early.
We ensure all products meet global environmental and safety standards, including RoHS, REACH, CE, and UL certifications. Furthermore, our localization support team provides real-time communication in English, ensuring your design specifications are translated accurately onto the factory floor.
How STHL mitigates risk, secures component allocation, and guarantees supply chain continuity.
We source components exclusively from authorized distributors (Arrow, Avnet, Future Electronics) and original manufacturers. Our incoming quality control (IQC) lab performs rigorous verification, including component marking analysis and electrical testing, to prevent counterfeit parts from entering production.
When critical components face long lead times or obsolescence (EOL), our engineering team proposes high-quality, pin-to-pin compatible alternatives. This proactive approach keeps your production lines running smoothly and avoids costly redesigns.
We offer flexible shipping terms (FOB, CIF, DDU, DDP) and maintain strategic partnerships with global freight forwarders. Our secure warehousing facilities support safety stock programs, allowing us to buffer against sudden demand spikes.
Get authoritative answers to common questions regarding flexible electronics manufacturing, lead times, and quality standards.
Flexible PCBs (FPCs) offer significant space and weight savings, typically reducing weight by up to 70% compared to rigid boards. They allow for 3D routing, which is essential for compact consumer electronics, medical wearables, and automotive dashboards. Additionally, FPCs improve reliability in high-vibration environments by eliminating mechanical connectors and solder joints that are prone to fatigue.
We utilize high-precision SMT placement machines equipped with optical alignment systems. Post-reflow, every board containing BGA or QFN components undergoes 3D X-Ray inspection (AXI) to detect hidden defects such as solder voiding, bridging, or open joints. This is complemented by Automated Optical Inspection (AOI) and functional testing (FCT) to ensure 100% electrical compliance.
STHL is fully certified under IATF 16949:2016 for automotive electronics and ISO 13485:2016 for medical devices. We also maintain ISO 9001:2015 (Quality) and ISO 14001:2015 (Environmental) certifications. All our manufacturing processes are compliant with RoHS and REACH standards, ensuring environmental safety and global market access.
Yes, we offer full turnkey component sourcing. Our global procurement network allows us to secure hard-to-find components and manage allocations. In cases of component obsolescence (EOL), our engineering team identifies and validates alternative parts (form, fit, and function compatible) to ensure uninterrupted production.
Explore our diverse range of specialized PCB assemblies designed for safety, power conversion, and precision monitoring.
STHL PCBA
