Discover our advanced manufacturing solutions optimized for diverse industrial, consumer, and high-reliability verticals.
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, with 20 years of experience in electronics contract assembly manufacturing, STHL has built a formidable reputation. 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), highly effective SMT and THT assembly, we are recognized as a long-term reliable PCBA vendor by more and more customers worldwide.
Welcome to visit STHL factory at any time.
How global enterprises leverage Shenzhen's localized ecosystems to reduce time-to-market, minimize compliance risk, and secure high-mix, low-to-high volume production paths.
In the realm of Printed Circuit Board Assembly (PCBA), proximity to components, base materials, and raw copper manufacturing is critical. Shenzhen houses the world's most dense cluster of component distributors, design houses, and hardware engineers. This concentration allows factories like STHL to solve component obsolescence, execute design modifications, and run fast-turn prototyping cycles within a fraction of the time required in western regions.
By partnering with STHL, companies transition from a simple transactional "China PCB order service" model to a strategic manufacturing alliance. We utilize localized ecosystem integration to source hard-to-find chips directly from authorized manufacturers and verified brokers, ensuring component legitimacy while safeguarding production timelines.
Surface Mount Technology (SMT) is the backbone of modern electronics, demanding absolute accuracy at micro-scale. At STHL, we handle a wide range of advanced components, including:
But our commitment to quality goes beyond component expertise. We utilize advanced inspection techniques, including Automated Optical Inspection (AOI), Solder Paste Inspection (SPI), and X-Ray inspection, to guarantee flawless assembly and solder joint integrity.
For high-stress, high-power, and mechanically demanding applications (such as EV charging piles and solar inverters), Through-Hole Technology (THT) remains indispensable. STHL PCBA excels in THT assembly, providing:
From PCB prototype runs to high-volume turn-key box build configurations, our services are structured to act as an extension of your engineering team.
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 (FR4, Rogers, Megtron) 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 supply full turnkey 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 deployment in extreme environments.
Navigating global regulatory landscapes requires meticulous engineering documentation and traceability protocols. Here is how we secure compliance.
Adhering to IATF 16949 for automotive electronics and ISO 13485 for medical devices, STHL implements rigid APQP (Advanced Product Quality Planning) and PPAP (Production Part Approval Process) structures. This ensures that every PCBA, from EV charging pile controls to surgical equipment monitors, undergoes audited traceability.
We enforce strict information security protocols. Access to client Gerber files, BOM lists, and firmware is tightly controlled via secure local servers. Our secure flashing stations prevent firmware leakages, and we sign legally binding NDAs to assure peace of mind for IP-sensitive systems, such as avionics (EFIS) and advanced smart communication modules.
Every China PCB order submitted to STHL undergoes a comprehensive Design for Manufacturability (DFM) review before fabrication begins. Our local bilingual engineers cross-verify footprint dimensions, pad layouts, track clearance, and thermal distributions to prevent manufacturing defects and costly design alterations down the road.
Meeting the demands of next-generation hardware through innovation, advanced substrates, and automated assembly protocols.
As global industries shift toward smart automation, miniature electronics, and high-frequency IoT applications, the requirements for printed circuit board manufacturing have grown more complex. To handle high-speed data transmission and high-density packaging, STHL constantly updates its assembly facilities to accommodate HDI (High Density Interconnect) boards, rigid-flex PCBs, and specialty laminates.
For example, our manufacturing lines process Smart Speaker PCBA and Smartphone PCBA which demand extremely dense component placement, micro-BGAs, and sophisticated thermal dissipation solutions. In parallel, heavy-power applications like EV Charging Pile PCBA and Solar Inverter PCB Assembly call for heavy copper layers, heavy-duty through-hole soldering, and specialized insulation parameters to manage high currents without thermal runaway.
Furthermore, environmental sustainability is changing how materials are sourced. Lead-free solder options, halogen-free laminates, and eco-friendly PCB disposal schemes are central to our green production framework. Through optimized manufacturing processes, STHL helps global enterprises achieve carbon footprint reduction goals without compromising structural performance.
Get answers to the most common questions regarding engineering, procurement, and quality assurance processes.
We source components directly from original component manufacturers (OCMs) or authorized franchise distributors (like DigiKey, Mouser, Arrow, and Avnet). For custom or hard-to-source components, we utilize audited suppliers and run rigorous inbound quality inspections, including component visual checking, X-ray scanning, and testing at third-party test centers if necessary, to ensure zero counterfeit issues.
To provide a precise quote, we require: 1) Gerber files (RS-274X format or ODB++ format), 2) Bill of Materials (BOM) in Excel format containing part numbers, manufacturers, quantities, and descriptions, 3) Pick-and-Place coordinate file (Centroid file), and 4) Any testing requirements, assembly guidelines, or 3D step files for box build projects.
Yes! STHL runs dedicated prototype lines configured for rapid setup and fast-turn delivery. We support low-volume high-mix orders (minimum order quantity is 1 piece) to help you validate your designs. Once validated, our 7 automated SMT lines and dedicated mass-production DIP lines handle seamless high-volume scaling.
Our factory operations conform to critical global quality benchmarks. We hold ISO 9001 (Quality Management), ISO 14001 (Environmental Management), ISO 13485 (Medical Devices Quality Management), and IATF 16949 (Automotive Quality Management). Additionally, we implement IPC-A-610 Class II/III standards for SMT/THT quality controls and use RoHS lead-free processes to guarantee environment safety.
We offer structural testing including automated optical inspection (AOI), solder paste inspection (SPI), and X-ray inspection for BGAs. For functional validation, we perform In-Circuit Tests (ICT), custom functional testing (using testing rigs provided by the customer or built by STHL to your specifications), programming, and environmental burn-in testing to ensure full product reliability before dispatch.
Further custom electronic assemblies engineered to meet exact performance parameters across international markets.
STHL PCBA
