Explore our engineering capabilities across critical applications, showcasing premium board layouts, strict compliance, and precision component population.
In the modern industrial paradigm, electronics form the nervous system of industrial automation, medical healthcare, green energy, and transportation. The choice of an OEM PCB maker and assembly factory is no longer just a purchasing transaction; it is a critical strategic partnership. Global tech leaders require contract manufacturers who exhibit profound expertise in mechanical robustness, signal integrity, thermal management, and long-term hardware reliability.
As electronic architectures grow increasingly compact and dense, manufacturing standards have risen exponentially. Realizing high-density, multi-layer designs demands precision equipment, rigorous materials traceability, and a highly mature engineering process. From automated SMT placements dealing with 01005 components to selective wave soldering for heavy industrial connectors, standard-setting PCBA factories must operate under zero-defect quality systems.
STHL, established in 2006, occupies a leading position in this specialized electronics ecosystem. By offering end-to-end Solutions—encompassing rigid, flex, and rigid-flex PCB fabrication, strict global components sourcing, complex PCB assembly, and multi-tier functional testing—STHL supports global clients in transforming designs into scalable, field-proven hardware solutions.
For two decades, STHL has driven the technology of global companies by producing highly certified electronic assemblies.
Year Established
Industry Experience
Expert Staff Members
Advanced Facility Area
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.
Surface Mount Technology (SMT) is the backbone of high-density electronic products. Our SMT processing capabilities are optimized to manage component density, tiny component outlines, and double-sided reflow challenges.
To guarantee physical solder joint integrity under the component bodies, we utilize automated 3D X-Ray and 3D AOI systems to detect voids, offsets, or open-circuit faults that visual inspections cannot identify.
While SMT is critical for miniaturization, Through-Hole Technology remains indispensable for connectors, high-power components, and modules exposed to extreme stress or high thermal loads.
Discover how the integration of localized logistics, component availability, and engineering efficiency lowers your product's Total Cost of Ownership.
Situated in Shenzhen, the electronics capital of the world, STHL has instantaneous access to custom plastic injection molds, high-precision machining, raw copper laminates, and packaging. This reduces prototyping cycle times from weeks to days.
Our long-term partnerships with certified original component manufacturers (OCMs) and primary distributors (Avnet, Arrow, DigiKey) eliminate the risk of counterfeit components, maintaining high security of the bill-of-materials (BOM).
Our production floor operates 7 automated SMT lines. This layout enables rapid changeovers, meaning we can execute low-volume high-mix NPI (New Product Introduction) runs just as efficiently as high-volume continuous output.
An end-to-end industrial manufacturing platform designed to support products from raw design to packaged units.
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 offer 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 assembly 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 customized electronics manufactured by STHL are deployed in global projects, satisfying regulatory and mechanical needs.
In devices such as OEM Pulse Oximeters and Ward Monitoring systems, reliability is directly tied to life safety. Under ISO 13485 environments, we ensure void-free SMT solder joints, specialized conformal coatings to protect boards from medical solvents, and full components trace histories.
Safety devices like Supplemental Restraint Systems (SRS) and Transmission Control Units (TCU) operate in extreme vibration and temperature environments (-40°C to 125°C). STHL implements IATF 16949 workflows, incorporating thermal cycling screens and heavy-copper trace profiles to ensure physical layer longevity.
Battery Management Systems (BMS), On-Board Chargers (OBC), and wind/solar power inverters face heavy voltages and transient power surges. STHL utilizes specialized high-TG dielectric materials, thick copper cores, and isolated-circuit routing layouts to guarantee thermal dissipation and protect logic components from dangerous high-current discharges.
Programmable Logic Controllers (PLCs) in factory environments require high electromagnetic immunity (EMI). We provide precision copper shielding structures, differential signaling route-matching, and complete potting services to protect control boards from oil, high humidity, and dust.
As electronics continue to evolve, STHL is continuously modernizing its capabilities to adapt to upcoming industrial requirements.
Developing capabilities for stacked micro-vias down to 0.075 mm and laser drilling to process smaller electronic footprints for modern 5G RF hardware and smart AIoT devices.
Integrating machine learning algorithms into our AOI and solder paste inspection (SPI) systems. The algorithms classify defects autonomously, ensuring high accuracy and reducing reliance on manual inspections.
Transitioning toward bio-degradable resins and halogen-free laminates that satisfy rigorous global environmental directives (WEEE, REACH, RoHS III) without compromising structural integrity or heat resistance.
Ensuring that our electronics manufacturing meets all necessary technical standards and quality systems.
Our facilities run on certified ISO 9001:2015 and IATF 16949:2016 platforms. Processes, from incoming raw goods inspections to dynamic solder temperature wave controls, are fully documented and audited regularly.
We are compliant with ISO 13485:2016 requirements, allowing us to build devices that demand detailed record keeping, risk evaluation, and full lot traceability for active implantable and diagnostic hardware.
STHL provides custom DDP/FOB delivery, utilizing advanced customs-clearance pathways to supply direct shipments to the US, Germany, Italy, UK, and 90 other countries. This minimizes custom delays and simplifies international procurement.
Browse our catalog of custom assemblies configured for green energy, communications, safety systems, and display technologies.
Get answers to common technical, design, and manufacturing questions to help streamline your next project.
STHL PCBA
