Explore our high-precision PCBA solutions engineered for medical, automotive, industrial, and consumer 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.
Established in 2006, with 20 years of experience in electronics contract assembly manufacturing, STHL has grown into a trusted partner for global enterprises. 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.
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), and highly effective SMT and THT assembly, we are recognized as a long-term reliable PCBA vendor by more and more customers worldwide.
Our state-of-the-art manufacturing lines are optimized for high-density, multi-layer circuit board assembly with zero-defect tolerance.
We handle a wide range of advanced, high-density components with extreme precision. Our SMT capabilities include:
For high-power, high-stress, and robust mechanical connections, our THT assembly line offers unparalleled reliability:
From initial design review to final product packaging, STHL provides a seamless, turnkey manufacturing experience.
Operating 7 automated SMT lines and 2 DIP/THT lines. We handle prototype runs to high-volume mass production with equal precision and speed.
Manufacturing high-quality, reliable PCBs from simple single-sided boards to complex multi-layer, rigid-flex, and high-density interconnect (HDI) substrates.
Global sourcing network ensuring access to genuine, certified components. We mitigate supply chain risks, counterfeit parts, and long lead times.
Precision manufacturing of custom wire harnesses and cable assemblies, including connectors, shielding, and ruggedized overmolding.
Full system integration services, including PCBA installation, enclosure assembly, cabling, software loading, and final packaging.
Rigorous Functional Testing (FCT), In-Circuit Testing (ICT), and environmental stress screening to guarantee 100% field reliability.
As multi-circuit boards evolve to support next-generation technologies, STHL is at the forefront of manufacturing innovation.
To support the miniaturization of medical devices and smart consumer electronics, we are scaling our capabilities in HDI technology, utilizing laser microvias, stacked vias, and Every Layer Interconnect (ELIC) to maximize routing density in minimal space.
With the rise of 5G, IoT, and automotive radar, we have optimized our reflow and lamination processes for specialized high-frequency substrates (e.g., Rogers, Taconic, Megtron). This ensures minimal signal loss and impedance control accuracy within ±5%.
Modern power electronics, such as EV charging systems and solar street light controllers, generate significant heat. We are expanding our production of Metal Core PCBs (MCPCBs) and heavy copper boards (up to 6 oz) to facilitate superior heat dissipation.
Artificial Intelligence requires high-performance computing boards with complex power delivery networks. We are refining our multi-layer lamination capabilities (up to 32 layers) to support high-power AI accelerators and edge computing gateways.
Providing specialized multi-circuit board manufacturing tailored to the regulatory and performance demands of key global sectors.
Certified under IATF 16949, we manufacture critical automotive assemblies including Body Control Modules (BCM), Electric Power Steering (EPS), and Battery Management Systems (BMS) for electric vehicles. Our processes guarantee high thermal stability and vibration resistance.
Compliant with ISO 13485, we produce medical-grade PCBAs for life-supporting and diagnostic equipment, including portable ultrasound systems, biochemical analyzers, pulse oximeters, and operating room video monitoring systems.
We build robust controller boards for harsh industrial environments. From soil detectors to perimeter protection systems and solar street light controllers, our assemblies are designed for continuous outdoor operation and extreme temperature swings.
Operating from Shenzhen, the global epicenter of electronics manufacturing, STHL leverages a highly integrated ecosystem to deliver unmatched efficiency and cost advantages:
We bridge the gap between overseas engineering teams and China manufacturing through rigorous quality standards and clear communication.
Our manufacturing processes are fully certified under ISO 9001:2015, ISO 13485:2016 (Medical), and IATF 16949:2016 (Automotive). We strictly adhere to IPC-A-610 Class 2 and Class 3 standards.
STHL is committed to green manufacturing. We hold ISO 14001:2015 certification and offer lead-free, RoHS-compliant assembly processes, ensuring your products meet strict environmental regulations globally.
Our dedicated project managers speak fluent English and possess deep technical backgrounds. We provide transparent engineering reports, DFM feedback, and real-time production updates to keep you in control.
Streamlining the procurement process for high-reliability multi-circuit board assemblies.
To ensure the fastest turnaround and most accurate pricing, please prepare the following files for your RFQ:
Before production begins, our engineering team conducts a comprehensive DFM review to identify potential manufacturing issues, such as:
Get answers to common technical and logistical questions regarding our multi-circuit board manufacturing services.
Browse our full range of custom multi-circuit board assemblies designed for global OEM clients.
STHL PCBA
