Shenzhen STHL is a premier, high-quality provider of Electronics Manufacturing Services (EMS) based in China, catering to a sophisticated global clientele. We manage the entire lifecycle of hardware manufacturing, delivering seamless end-to-end integration across PCB layout design, component sourcing, PCB fabrication, PCBA assembly, custom cable assembly, full box build assembly, and comprehensive functional testing protocols.
Established in 2006, STHL has accumulated nearly two decades of deep industry expertise in electronics contract assembly manufacturing. Our state-of-the-art 10,000 square meter facility is engineered to support both high-mix low-volume prototypes and high-volume mass production runs. Powered by a dedicated workforce of over 220 highly skilled technicians and engineers, we operate 7 advanced SMT lines, 2 DIP/THT lines, 2 dedicated functional testing (FCT) lines, and 2 finished device box-build assembly lines.
We serve critical industries worldwide, including energy power, telecommunications, automotive electronics, medical devices, consumer electronics, computer storage, safety & security systems, and industrial automation. Our global footprint spans major markets such as the USA, Germany, Italy, the UK, Poland, New Zealand, Argentina, Brazil, Turkey, Korea, Thailand, and over 90 other countries and regions.
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 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, fully qualified, and ready for end-user deployment.
Surface Mount Technology (SMT) is the backbone of modern electronics manufacturing. At STHL, we handle a wide range of advanced, high-density components with extreme precision. Our engineering team is highly proficient in managing complex packages, including:
Our commitment to quality goes beyond component expertise. We utilize advanced inspection techniques, including 3D Automated Optical Inspection (AOI) and high-resolution X-Ray inspection, to guarantee flawless solder joint integrity and alignment.
For applications requiring high mechanical strength, high voltage, or robust thermal performance, Through-Hole Technology remains indispensable. STHL PCBA excels in THT assembly, offering a comprehensive suite of services:
We engineer and assemble electronic assemblies tailored to the unique regulatory, environmental, and performance demands of diverse global industries.
Compliance with ISO 13485 guarantees that our medical PCB assemblies—ranging from biochemical analyzers to blood pressure monitors—meet the highest standards of reliability, safety, and traceability required for life-supporting devices.
Our IATF 16949 certification ensures that our automotive PCBA solutions, such as On-board Chargers (OBC) and advanced driver assistance systems (ADAS), withstand extreme thermal cycling, vibration, and rigorous operational stress.
We manufacture ruggedized control boards, data acquisition systems, and explosion-proof equipment designed to perform continuously in harsh industrial environments, high-temperature zones, and high-voltage power grids.
Operating out of Shenzhen, the global epicenter of electronics hardware innovation, STHL leverages a fully integrated local ecosystem to deliver unmatched supply chain resilience and cost efficiency. Our factory incorporates Industry 4.0 principles, integrating automated production lines with smart warehousing and dynamic resource planning.
Component Traceability & Quality Control: We utilize advanced Manufacturing Execution Systems (MES) to track every component from the moment it enters our warehouse to the final packaging of the assembled board. Unique barcode scanning ensures that every batch of resistors, capacitors, and ICs is fully traceable, mitigating the risk of counterfeit components and ensuring compliance with strict aerospace and medical guidelines.
Strategic Sourcing Network: Our long-standing relationships with authorized global distributors (such as Arrow, Avnet, Future Electronics, and DigiKey) alongside direct partnerships with local component manufacturers allow us to secure critical components even during global allocations. This multi-channel sourcing strategy minimizes lead times and shields our clients from unexpected supply chain disruptions.
By combining Shenzhen's rapid component sourcing speed with our rigorous quality inspection protocols, we reduce typical prototyping cycles by up to 40% and scale up to mass production with seamless transition and zero quality drop-off.
As electronic devices become smaller, faster, and more interconnected, STHL is continuously evolving its technical capabilities to meet the demands of tomorrow's technology.
We are expanding our capabilities in HDI technology, supporting microvias, stacked vias, and laser-drilled blind/buried vias. This allows us to assemble the next generation of ultra-compact IoT devices, wearables, and high-performance computing modules with pitches below 0.3mm.
To support high-frequency applications and space-constrained designs, our roadmap includes embedding passive and active components directly within the inner layers of the PCB. We are also enhancing our rigid-flex assembly lines to support complex 3D structural designs for aerospace and medical robotics.
STHL is committed to minimizing our environmental footprint. We are transitioning to 100% halogen-free materials, expanding our lead-free (RoHS compliant) wave and reflow soldering processes, and implementing advanced energy-saving systems across our 10,000 sqm facility.
For global enterprises, outsourcing manufacturing to China requires absolute trust in compliance, intellectual property protection, and communication. STHL bridges the gap by providing localized engineering support and adhering to international regulatory standards.
Regulatory Compliance: All products manufactured by STHL are built to comply with global standards, including CE, UL, FCC, RoHS, and REACH. We work closely with third-party testing laboratories to assist our clients in obtaining the necessary certifications for their target markets.
IP Protection & Data Security: We understand the critical importance of intellectual property. STHL implements strict data security protocols, secure server storage for client Gerber files and BOMs, and non-disclosure agreements (NDAs) with all employees and partners to ensure your designs remain confidential.
24/7 Engineering Support: Our English-speaking engineering team provides round-the-clock support, conducting thorough Design for Manufacturability (DFM) and Design for Testing (DFT) analyses before production begins. This prevents costly errors and ensures a smooth manufacturing process.
How to streamline your procurement process and get accurate, competitive quotes from STHL.
Provide complete PCB layout files in Gerber RS-274X or ODB++ format, including copper layers, solder mask, silkscreen, drill files, and board outline. Clear fabrication notes help us understand your material and stack-up requirements.
Submit a detailed BOM in Excel format, including manufacturer part numbers (MPN), descriptions, quantities per board, designators, and package types. Clearly indicate which components can be substituted and which must be sourced from specific manufacturers.
Include clear assembly drawings, special instructions (e.g., conformal coating, potting, custom programming), and functional testing procedures. Providing test fixtures and software scripts ensures we can perform 100% functional verification before shipping.
STHL PCBA
