Shenzhen STHL is a premier, high-quality provider of Electronics Manufacturing Services (EMS) in China. We serve customers worldwide along the entire industry chain, including PCB layout, component sourcing, PCB fabrication, PCBA assembly, cable assembly, box build assembly, and comprehensive testing services.
Established in 2006, STHL brings nearly two decades of contract assembly manufacturing experience to the global market. Our state-of-the-art 10,000 sqm facility is equipped with 7 advanced SMT assembly lines, 2 DIP/THT lines, 2 functional testing lines, and 2 finished device assembly lines, allowing us to scale seamlessly from prototyping to high-volume production runs.
We cater to demanding industries including energy power, communications, automotive, medical, consumer electronics, computers & storage, safety & security, and industrial automation. Our global footprint spans the USA, Germany, Italy, UK, Poland, New Zealand, Argentina, Brazil, Turkey, Korea, Thailand, and over 90 other countries.
Certified Quality: Operating under IATF16949, ISO9001, ISO14001, and ISO13485 frameworks, STHL guarantees full compliance with RoHS standards, ensuring environmental responsibility and exceptional reliability.
From micro-miniature components to heavy-duty power electronics, our engineering team ensures robust electrical connections and mechanical integrity.
Surface Mount Technology (SMT) is the backbone of modern electronics. At STHL, we handle a wide range of advanced, high-density components with extreme precision:
Our commitment to quality is backed by automated optical inspection (AOI), solder paste inspection (SPI), and real-time process monitoring to guarantee zero-defect shipments.
For high-stress, high-power, and mechanically demanding applications, Through-Hole Technology remains indispensable. STHL offers robust THT assembly solutions:
A comprehensive suite of turnkey services designed to accelerate your time-to-market and optimize production costs.
Operating 7 automated SMT lines and 2 DIP lines, we handle everything from quick-turn prototypes to high-volume production runs. Our flexible setup ensures rapid changeovers and optimized throughput for mixed-technology boards.
We fabricate high-quality, reliable printed circuit boards. Our capabilities range from simple single-sided boards to complex multi-layer PCBs, high-density interconnect (HDI) boards, flexible circuits, and rigid-flex configurations.
Leveraging a vast global supplier network, we source genuine, certified electronic components. Our supply chain solutions mitigate counterfeit risks, manage component obsolescence, and secure hard-to-find parts to keep production on schedule.
We manufacture custom cable harnesses and wire assemblies with precise termination, shielding, and overmolding. Designed to withstand harsh environments, our cable solutions serve diverse industrial, automotive, and medical applications.
Transition seamlessly from PCBA to finished product. We integrate PCBA boards into custom enclosures, route internal cabling, install displays and user interfaces, and perform final packaging, providing a complete, market-ready product.
We perform rigorous functional and parametric testing to verify that every board operates exactly as designed. By detecting assembly defects, firmware anomalies, and component failures early, we ensure field reliability and reduce warranty costs.
Staying ahead of industry trends to support next-generation electronic designs and advanced manufacturing requirements.
As consumer and medical electronics shrink, component density increases. Our SMT lines are optimized for 01005 and 008004 micro-passives, utilizing high-precision placement heads and advanced vision alignment systems to handle sub-millimeter components without loss of throughput.
We are integrating Artificial Intelligence into our 3D SPI (Solder Paste Inspection) and 3D AOI systems. By analyzing inspection data in real time, the system automatically adjusts stencil printing parameters and placement offsets, preventing defects before they occur.
The future of high-frequency electronics lies in embedding passive and active components directly inside the PCB substrate. STHL is partnering with leading PCB fabricators to develop advanced assembly processes for High-Density Interconnect (HDI) boards with embedded chips.
Tailored manufacturing processes and compliance frameworks designed for specific industrial sectors.
Automotive applications demand absolute reliability under harsh thermal and mechanical stress. We manufacture Vehicle Control Units (VCUs), Electronic Parking Brakes (EPBs), and advanced driver-assistance systems (ADAS) using high-grade solder alloys, conformal coating, and rigorous thermal cycling tests.
For life-critical medical devices like portable ultrasound equipment and patient monitors, we implement strict component traceability, cleanroom-like assembly conditions, and 100% functional testing. Our processes comply fully with medical regulatory standards.
Supporting the global transition to smart grids and industrial automation, we assemble high-reliability smart plugs, power supply boards, and sensor modules. Our assemblies are designed for long operational lifetimes in challenging electrical environments.
At STHL, we leverage the advanced manufacturing ecosystem of Shenzhen to deliver unmatched efficiency and supply chain resilience. By integrating smart warehousing, automated component tracking, and real-time production scheduling, we minimize lead times and eliminate bottlenecks.
Our strategic location gives us direct access to a vast network of verified component distributors and raw material suppliers. This proximity allows us to secure components quickly, mitigate global logistics disruptions, and pass the cost savings directly to our clients.
Through Design for Manufacturability (DFM) reviews conducted before production begins, our engineering team identifies potential assembly issues, optimizes panel layouts, and reduces material waste, ensuring a smooth transition from prototype to volume manufacturing.
Smart Sourcing & Traceability: Every batch of components entering our facility is barcoded and tracked throughout the assembly process. This ensures full traceability down to the individual component level, giving global buyers peace of mind.
Our automated SMT lines feature quick-change feeder carts and smart software integration, allowing us to run high-mix, low-volume (HMLV) projects alongside high-volume production runs without compromising efficiency or quality.
Bridging the gap between offshore manufacturing efficiency and local engineering support.
We understand the critical importance of IP security. STHL implements strict data access controls, secure internal networks, and non-disclosure agreements (NDAs) with all clients and staff, ensuring your proprietary designs remain confidential.
We simplify international logistics by offering flexible shipping terms, including FOB, CIF, DDU, and DDP. Our logistics team handles customs clearance, import duties, and local delivery, bringing the finished products directly to your warehouse.
Our English-speaking engineering and customer support teams operate across multiple time zones. Whether you need a rapid DFM feedback report or a real-time update on your production run, we are always available to assist.
Get answers to common technical and logistical questions regarding our OEM SMD board assembly services.
STHL PCBA
