Explore our high-performance electronic contract assembly capabilities, tailored to meet rigid quality standards across medical, telecommunications, automotive, and consumer electronics industries.
Established in 2006, Shenzhen STHL has evolved into a premier high-quality provider of Electronic Manufacturing Services (EMS) in China. Over nearly two decades of focus, we have consolidated our presence across the global electronics contract manufacturing value chain. Our vertical operations span custom PCB layout, comprehensive component sourcing, rigid and flexible PCB fabrication, precision PCBA assembly, specialized cable assembly, full box build integration, and automated verification testing.
Strategically headquartered in Shenzhen's electronics ecosystem, our 10,000 square meter factory is equipped with advanced manufacturing infrastructure. We employ a skilled team of over 220 professionals, running 7 automated SMT (Surface Mount Technology) assembly lines, 2 specialized DIP/THT (Through-Hole Technology) lines, 2 functional testing (FCT) lines, and 2 dedicated box build/finished device assembly lines.
Delivering precision board assembly through advanced technology interfaces, automated line configurations, and verified inspection protocols.
STHL's SMT processes are engineered to support dense component matrices, micro-pitch geometries, and double-sided reflow profiles. We process a diverse range of advanced components with micro-level precision:
For applications subjected to heavy mechanical stress or thermal loading, STHL provides robust THT processing. We optimize joint mechanical strength and connectivity through systematic process control:
From conceptual schematic translation to global product distribution, STHL operates a vertically integrated suite of services.
STHL operates 7 automated PCB assembly lines for both prototype validation and high-volume mass production. Advanced pick-and-place systems ensure precise component orientation, and skilled technicians manage selective wave soldering and manual component insertion under strict IPC standards.
Our circuit board fabrication services deliver high-density, multi-layered substrates matching detailed customer specifications. We fabricate single-sided boards, multilayer rigid structures (up to 32 layers), flexible circuits (FPC), and complex rigid-flex variants utilizing high-Tg material systems.
STHL manages a mature, global supply chain network for electronic components. Our engineering and procurement teams mitigate production delays by securing components from certified global distributors and direct silicon manufacturers, bypassing counterfeit risks and long allocation lead times.
We manufacture custom cable harnesses, connector interfaces, and high-frequency shielding assemblies. Our processes use robust retention systems, custom-molded strain reliefs, and diverse shielding configurations to ensure clean signal transmission and durability in demanding industrial environments.
STHL offers end-to-end integration by housing completed PCBA assemblies into metal or plastic enclosures. We handle secondary mechanical installations, wiring paths, pneumatic connections, and final product packaging, delivering fully finished and validated units directly to your distribution centers.
We configure and execute dedicated testing protocols, including In-Circuit Testing (ICT), Functional Circuit Testing (FCT), high-temperature environmental burn-in, and boundary scan checks. This testing ensures that every shipped device performs reliably to the design specifications, preventing field failures.
Combining automated production technologies with smart logistics management to deliver reliable high-volume manufacturing.
STHL connects its ERP platform directly with automated Component Storage systems. This real-time visibility allows for immediate component verification, material tracking, and low-stock alerts, which helps minimize inventory overhead and keep production timelines on schedule.
Our Manufacturing Execution System (MES) records every step of the PCB assembly process. From stencil paste printing and component mount placement to reflow temperature profiling and final testing, every stage of production is tracked and logged for full component and process traceability.
Our SMT production lines are configured for quick changeovers, allowing us to support both High-Mix Low-Volume (HMLV) prototypes and high-volume continuous runs. Our optimized nozzle configuration and smart board loaders enable rapid transitions, reducing down-times and setup costs.
Providing specialized manufacturing services certified under international standards for high-reliability medical, automotive, and industrial applications.
We manufacture safety-critical automotive systems, including Anti-lock Braking Systems (ABS), Advanced Driver Assistance Systems (ADAS), and Telematics Control Units (T-Box). All operations follow the strict APQP (Advanced Product Quality Planning) framework, ensuring zero-defect performance under high-vibration and extreme temperature conditions.
IATF 16949 CertifiedOur production environment is optimized for Class II and Class III life-supporting medical devices, such as intensive care ventilators, digital X-ray diagnostics, and patient monitoring equipment. We maintain detailed device master records (DMR) and trace all materials back to the original wafer run to ensure reliable, long-term performance.
ISO 13485 CompliantWe assemble high-power industrial electronics, including solar power inverter arrays, Smart Energy Storage Battery Management Systems (BMS), and automated industrial process controls. Our production features heavy-copper PCBs, selective wave soldering for thick connector pins, and thermal interface coatings.
High-Current PerformanceSTHL manufactures consumer electronics like smart speaker boards, wireless VoIP gateways, and active LED backlighting systems. We support compact layouts, fine-pitch BGAs, and rigid-flex configurations to balance signal integrity and mechanical packaging constraints.
Fine Pitch AssemblyOur commitment to advancing technology ensures we are equipped to support next-generation product design and complex board requirements.
Supporting international procurement teams with clear material sourcing, risk management, and logistics planning.
STHL maintains a dual-sourcing network for passive components and mechanical hardware. By verifying cross-referenced parts against original design specifications, we prevent component shortages from stalling production runs.
We source active components directly from certified manufacturers or authorized franchise distributors. Incoming parts are verified through barcode trace scanning, visual inspection, and electrical testing to ensure authenticity.
Our export services handle global shipping logistics, including customs clearances, export classification codes, and shipping coordination. We work with sea, air, and express parcel carriers to keep transit times predictable.
Common questions from engineering leads and procurement managers regarding our China-based PCB assembly capabilities.
Explore our additional board assembly projects, showing our expertise across automotive, telecommunications, energy storage, and industrial control systems.
STHL PCBA
