Explore our diverse contract manufacturing solutions deployed in highly demanding industries worldwide.
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.
Welcome to visit STHL factory at any time.
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 and prevent latent joint defects under hidden component matrices.
Continuous investment in next-generation manufacturing technology to handle high-density interconnect (HDI) boards and sub-01005 components.
Achieving ultra-high precision placement capability down to 01005 (0402 Metric) chip components, optimized for miniature wearables, multi-sensor IoT nodes, and high-frequency RF applications.
Real-time integration of 3D Solder Paste Inspection (SPI) data with 3D AOI systems. Feedback loops automatically adjust screen printing parameters to maintain Zero Defect manufacturing runs.
Deploying vertical component stacking processes (PoP) using precision solder paste dipping and high-accuracy placement heads to maximize computing power per unit area on micro-processors.
Pioneering advanced reflow profiling for lead-free, halogen-free, and low-temperature paste chemistry to lower carbon emissions during manufacturing while maintaining thermal mechanical reliability.
STHL PCBA also excels in Through-Hole Technology (THT) assembly. Our comprehensive mechanical and hand-insertion services encompass:
From schematic verification to volume manufacturing, box build assembly, and final logistics coordination.
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, reliable, and fully qualified for operation under real field conditions.
Why global OEMs partner with STHL in Shenzhen, the electronics capital of the world, for optimized total cost of ownership (TCO).
Modern electronic manufacturing requires complete accountability. At STHL, our factory floors utilize an integrated Manufacturing Execution System (MES) that tracks each board from PCB routing to shipping. Component reels are linked directly to placement programs via 1D/2D barcodes, enabling complete component lot traceability in the event of component manufacturer recalls.
Our automation workflow includes:
Our strategic localization within the Pearl River Delta industrial cluster allows us to source raw materials, custom heat sinks, specialized connectors, and mechanical enclosures within a matter of hours. We pass this localized procurement efficiency down to our clients via shorter turnaround times for prototypes and rapid ramp-ups for mass-market rollouts.
By keeping layout review (DFM), bare PCB manufacturing, BOM sourcing, SMT assembly, and mechanical integration within one controlled hub, we eliminate cross-border shipping delays during the crucial design verification phase.
Engineered assemblies matching the unique regulatory and stress environments of distinct global industries.
| Industry Sector | Technical Challenge | STHL Specific Solution | Standard & Compliance |
|---|---|---|---|
| Automotive Electronics | Extreme temperature fluctuations, high vibration, moisture cycles. | Heavy copper PCBs, potting, underfill for high pin-count ICs, automated conformal coating. | IATF 16949, IPC-A-610 Class 3 |
| Medical Technology | High reliability safety-critical control boards, bio-compatibility. | AOI/X-ray inspection protocols, traceability of materials, controlled environment. | ISO 13485, RoHS compliant |
| Renewable Energy Systems | High-voltage insulation spacing, thermal dissipation, surge currents. | Direct Bonded Copper (DBC) substrates, heavy potting, high-quality component selection. | UL 94V-0, CE Mark Support |
| Smart Home / IoT | Extremely tight form factor constraints, battery consumption. | Rigid-Flex PCB layouts, ultra-fine pitch SMT (down to 0.3mm spacing for BGA). | FCC, CE, RoHS compliance |
| Industrial Control | 24/7 continuous operation, electromagnetic interference (EMI). | Multi-layer layout verification, shielding designs, selective soldering. | ISO 9001, RoHS |
At STHL, compliance is integrated into every step of our manufacturing cycle, ensuring your products easily clear regulatory hurdles in the EU, Americas, and APAC markets.
Expanding manufacturing footprint offshore requires robust legal and logistics structures. STHL acts as a transparent contract manufacturing extension for our international clients. We support multi-currency billing, detailed trade compliance documentation, and secure IP protocols to protect your proprietary software and firmware during micro-controller flashing.
Our DFM (Design for Manufacturing) review cycle ensures that layout discrepancies, non-optimal component spacing, thermal imbalance risks, and footprint mismatch problems are discovered and resolved before purchasing tooling, saving thousands of dollars in redesign costs.
Addressing key technical evaluation metrics for professional supply chain and procurement officers.
Fast-track evaluation options to test new circuit topologies. Quick-turn SMT capabilities provide validation-grade boards in as little as 3-5 days, streamlining the process between engineering models and manufacturing releases.
Active cross-referencing to swap hard-to-source components with pin-to-pin drop-in replacements. This significantly reduces lead times during times of chip supply constraint, preventing production line shutdowns.
Every PCBA batch undergoes visual checks, 3D SPI paste validation, automated opto-electric inspection (3D AOI), and ICT (In-Circuit Testing) or flying probe testing, ensuring high First Pass Yields (FPY).
Get clear, technical answers concerning STHL's SMT and EMS capabilities.
Discover more specialized sub-assemblies produced at STHL's state-of-the-art facilities.
STHL PCBA