Explore our selection of state-of-the-art printed circuit boards and electronic assemblies custom-configured for extreme environments, heavy-duty utility, and high-performance applications.
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.
Our mandate is clear: bridge the gap between complex electronic design engineering and high-yield, zero-defect mass production. Welcome to visit STHL factory at any time.
In today's highly volatile industrial and technological ecosystem, advanced circuits act as the primary neurological pathway for modern systems. Modern manufacturing requires more than standard circuit layout; it demands complex, multi-tiered architectures built to handle high power densities, extreme temperatures, and reliable high-speed data transmission.
From medical imaging arrays to grid-tied solar systems, the necessity of securing a reliable PCB partner is critical. Modern hardware engineering demands PCB assemblies with robust materials (such as High-Tg FR4, polyimide, and metal-clad backplanes) to guarantee signal fidelity and mitigate thermal degradation. Let's look at how advanced circuit solutions support primary industry groups worldwide:
We build solar inverter assemblies and wind turbine control systems engineered with heavy copper tracks (up to 4oz or more) to sustain high power conversion levels, preventing localized heating and ensuring 25-year operational lifespans in harsh environmental conditions.
Compliant with IATF 16949 standards, we manufacture electronic parking brakes (EPB), engine control units, and driver-assist radar modules. Our process focuses on automotive-grade solder joint reliability, high thermal cycles, and rigorous test coverage.
Under strict ISO 13485 manufacturing procedures, we construct operating room displays, life-support system modules, and clinical diagnostic sensors where zero-failure tolerance, bio-compatibility, and signal insulation are mandatory.
Our automated SMT lines build high-frequency RF boards, signal boosters, and enterprise switches. We utilize ultra-precise component placement on high-density interconnect (HDI) boards to manage impedance matching and minimize crosstalk.
In modern electronics manufacturing, miniaturization and board density dictate layout methodologies. Component designs continue to scale down, and standard assembly methods can struggle with current demands. That is why STHL utilizes updated, fully automated surface mount technology (SMT) machines.
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 and X-Ray inspection, to guarantee flawless assembly. High-magnification 3D X-Ray inspection enables our engineers to look directly inside the solder spheres under BGAs, finding micro-voids, solder bridging, and cold-solder scenarios before boards leave the facility.
While SMT has become the dominant technology for high-density circuits, Through-Hole Technology (THT) remains indispensable for components subjected to high mechanical stress, high current paths, or high-power thermal dissipation. Heavy transformers, industrial relays, connectors, and electrolytic capacitors rely on through-hole pins for mechanical anchoring and electrical performance.
STHL PCBA also excels in Through-Hole Technology (THT) assembly. Our services encompass:
By combining both SMT and THT technologies on a single double-sided assembly, we give engineers the flexibility to design complex systems without compromising mechanical strength or design density.
Our facility is designed to support the entire lifecycle of your product, providing a seamless transition from raw design files to tested, packaged, and retail-ready systems.
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 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 and fully qualified.
One of the biggest obstacles global engineering teams face during off-shore manufacturing is communication latency and compliance mapping. At STHL, we address this with proactive design review procedures and comprehensive product tracking.
Our engineering teams are trained in IPC-A-610 Class II and Class III standards, which means your project is checked for DFM (Design for Manufacturability) guidelines before tooling begins. This process helps resolve design errors, such as thermal relief pathing conflicts or incorrect footprint patterns, early in the cycle to prevent production delays.
Through our integrated ERP database, every single component we source is tracked back to its original franchised distributor. This eliminates counterfeit risks and provides detailed tracking data, which is essential for medical products and automotive systems.
We are fully compliant with RoHS and REACH regulations. We also offer lead-free processes with RoHS-compliant laminates, surface treatments (ENIG, OSP, HASL-LF), and soldering wires, which are required for imports to the European Union and North America.
We hold certifications for ISO 9001 (Quality Management), ISO 14001 (Environmental Protection), ISO 13485 (Medical Device Manufacturing Standards), and IATF 16949 (Automotive Systems Certification) to maintain high-quality operations across all production lines.
As technologies like AI, high-frequency communications (5G/6G), and high-power electric vehicle chargers continue to grow, the demands on printed circuit boards are shifting rapidly. STHL continues to invest in advanced production capabilities to support the development of next-generation hardware designs.
Our technical development roadmap includes:
For typical prototype projects with components sourced, SMT assembly can be completed within 24 to 48 hours. Mass production orders generally take between 2 to 4 weeks, depending on component availability and the complexity of the board design.
Our SMT pick-and-place lines feature high-resolution optical positioning systems to align and place components down to 0.15mm pitches. Every BGA assembly is verified using 3D X-ray inspection to check alignment and prevent joint bridging.
We provide a complete range of testing options, including Automated Optical Inspection (AOI), 3D X-Ray Inspection, In-Circuit Testing (ICT), and Functional Testing (FCT). We can also build custom testing fixtures tailored to verify your product's specific operating requirements.
Yes, our processes comply with RoHS and REACH regulations, and our production facility is ISO 14001 certified. We provide complete lead-free soldering services to ensure all assemblies meet international environmental compliance requirements.
Explore our high-performance electronic assemblies engineered for industrial, computer, automotive, and aerospace applications.
STHL PCBA