Explore our advanced manufacturing capabilities across medical, industrial, automotive, and consumer electronics applications.
Shenzhen STHL is a high-quality provider of electronics manufacturing services (EMS) in China, serving 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, STHL brings 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 come from the USA, Germany, Italy, UK, Poland, New Zealand, Argentina, Brazil, Turkey, Korea, Thailand, and other 90 regions of the world.
As an IATF16949, ISO9001, ISO14001, and ISO13485 certificated electronics assembly manufacturer, we produce products exactly complying with RoHS standards and quality guarantees. 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.
We can handle a wide range of advanced components, ensuring precise placement and robust solder joints for even the most challenging designs:
Our commitment to quality goes beyond component expertise. We utilize advanced inspection techniques, including AOI and X-Ray inspection, to guarantee flawless assembly and prevent latent defects in high-density interconnect (HDI) boards.
STHL PCBA also excels in Through-Hole Technology (THT) assembly, providing robust mechanical bonds for heavy-duty industrial and power electronics:
Just like SMT assemblies, THT boards undergo rigorous inspection and functional testing before shipment to ensure complete reliability under harsh operating conditions.
From prototype to high-volume production, we provide end-to-end electronics manufacturing services.
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 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 immediate deployment.
As electronic devices shrink in footprint while demanding higher processing power, SMT capabilities must evolve. At STHL, we are continuously upgrading our manufacturing lines to support next-generation packaging technologies.
Our roadmap focuses on the integration of ultra-miniaturized components, such as 01005 and 008004 passives, which require sub-micron placement accuracy. We are also expanding our capabilities in Package-on-Package (PoP) stacking and multi-die modules to support advanced IoT and edge-computing hardware.
To ensure thermal reliability in high-power applications, we are implementing vacuum reflow soldering systems. This technology significantly reduces voiding in BGA and QFN thermal pads, ensuring optimal heat dissipation and long-term mechanical integrity.
"The future of SMT lies in high-density integration and zero-defect manufacturing. Our investments in 3D SPI and 3D AOI are designed to meet these exact challenges."
Support for 0.3mm pitch BGAs and 01005 passive components with closed-loop feedback systems.
Implementation of vacuum-assisted reflow to reduce solder voiding to less than 5% for critical power electronics.
Integration of real-time AI defect classification in 3D AOI and SPI systems to optimize printer and mounter parameters automatically.
Tailored manufacturing strategies designed to meet the unique regulatory and technical demands of key industrial sectors.
Automotive electronics require absolute reliability under extreme thermal and mechanical stress. We manufacture ADAS controllers, Telematics Boxes (T-Box), and Heads-Up Displays (HUD) using automotive-grade components, strict trace-ability protocols, and rigorous thermal cycling tests.
Compliance and precision are paramount for medical hardware. From biological monitoring systems to diagnostic equipment, our ISO 13485 certified processes ensure cleanroom-level handling, comprehensive component traceability, and 100% functional testing to guarantee patient safety.
Programmable Logic Controllers (PLCs), DC-DC converters, and smart grid monitors require robust designs capable of continuous operation. We utilize heavy copper PCBs, selective wave soldering for high-power connectors, and conformal coating to protect against harsh environments.
Operating in Shenzhen, the global epicenter of electronics hardware, STHL leverages an unparalleled ecosystem of component distributors, PCB fabricators, and logistics networks. This geographic advantage allows us to offer rapid turnaround times without compromising on quality.
Our facility is integrated with a modern Manufacturing Execution System (MES) that tracks every board from bare PCB loading to final packaging. This digital thread ensures complete traceability of components, solder paste batches, and reflow profiles, providing our global clients with transparent quality audits.
By combining local supply chain agility with international quality standards, we mitigate risks related to component obsolescence, material allocation, and logistics bottlenecks, ensuring your product reaches the market on schedule.
Navigating international regulatory frameworks is a core strength of STHL. We ensure that all products manufactured in our facility comply with regional standards, including CE, FCC, UL, and RoHS. Our engineering team provides Design for Manufacturability (DFM) feedback to optimize designs for local sourcing and cost reduction.
We offer dedicated support for global clients, bridging the gap between design teams in the West and manufacturing teams in China. Our transparent communication, detailed engineering reports, and secure IP protection protocols ensure a seamless outsourcing experience.
Our certifications include: IATF 16949 (Automotive), ISO 13485 (Medical), ISO 9001 (Quality Management), and ISO 14001 (Environmental Management).
Get answers to common technical and logistical questions regarding our SMT and PCBA services.
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STHL PCBA
