Explore our core product capabilities engineered to withstand harsh environments, optimized for thermal efficiency, high integrity signals, and industrial performance.
Established Year
Technical Engineers & Staff
Modern EMS Facility
Global Export Regions
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. Welcome to visit STHL factory at any time.
Operating state-of-the-art pick-and-place systems, advanced reflow ovens, and customized wave-soldering processes designed to fulfill IPC-A-610 Class II and Class III standards.
Our production facilities are equipped to manage the complete lifecycle of dense, multi-layer surface mount assemblies. We handle a wide range of advanced components, ensuring precise alignment and low defect rates (DPMO):
For power electronics, high-vibration systems, and interfaces requiring rugged mechanical bonds, STHL's specialized through-hole lines deliver high-reliability connections:
From design validation to volume production, our end-to-end solutions optimize speed-to-market while reducing risk at every stage of the manufacturing process.
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 offer 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.
Providing specialized PCBA layout, assembly, and testing engineered to survive extreme thermal, mechanical, and electrical stresses across demanding global sectors.
Specialized heavy-copper PCBs and components for EV charging units, BMS boards, and on-board diagnostic infrastructure designed to withstand harsh vehicle vibrations and thermal cycles.
Manufactured under strict ISO 13485 guidelines, ensuring medical-grade reliability for CT scanners, biosensors, and monitoring equipment where system failure is not an option.
Rugged controllers, sensor nodes, and telemetry systems optimized for environmental monitoring, noise control, waste gas analytics, and industrial factory floor networks.
Optimized substrate material processing for wireless phones, routers, high-frequency transmitters, and networking gear requiring controlled impedance and minimal signal loss.
To support high-reliability engineering sectors in Europe, North America, and APAC, our production protocols are certified to global quality standards. This ensures that every PCBA leaving our factory floors complies with regional regulatory demands and safety frameworks:
Our commitment to continuous improvement guarantees that STHL remains at the cutting edge of manufacturing technology. Here is how we support future electronic designs.
Expanding capabilities to handle 0.2mm BGA pitches and 3/3 mil trace/space limits using laser direct imaging (LDI) and modified semi-additive processes (mSAP).
Integrating resistors, capacitors, and active silicon directly within the inner PCB layers to save outer surface area for ultra-compact IoT applications.
Integrating deep learning and neural network engines directly into our 3D AOI and X-Ray (AXI) machines to catch latent microscopic cold solder joints automatically.
Pioneering low-temperature lead-free reflow systems and zero-waste wastewater recovery networks to exceed the most stringent global environmental mandates.
Get professional answers to your critical engineering, lead time, and supply chain management questions regarding high-quality PCB manufacturing.
STHL is certified to IATF 16949 (Automotive), ISO 13485 (Medical Devices), ISO 9001 (Quality Management System), and ISO 14001 (Environmental Management System). All manufacturing lines comply strictly with RoHS standards and lead-free directives.
Yes. We run dedicated, flexible NPI (New Product Introduction) lines to provide fast-turn prototypes. Once validated, projects transition seamlessly to our 7 automated high-speed SMT lines for mid-to-large scale mass production.
We source active and passive parts directly from original component manufacturers (OCMs) or authorized franchises. All inbound parts undergo strict optical inspection and testing in our quality labs, with full traceability documentation retained.
Every single board passes through 3D Automated Optical Inspection (AOI). For high-density BGAs, we use 3D X-Ray (AXI). Additionally, we provide In-Circuit Testing (ICT), custom Functional Testing (FCT), environmental burn-in, and temperature cycling tests.
We maintain an open-volume policy. We support high-mix, low-volume prototype builds as well as high-volume runs containing thousands of complex assemblies to meet diverse engineering needs.
Yes. STHL specializes in turnkey box build services. This includes PCB assembly, cable and wire harness integration, enclosure assembly (plastic or metal), final functional testing, labeling, and direct-to-customer packing.
We process standard FR4, high-Tg FR4 (such as Shengyi or Rogers substrates), halogen-free substrates, aluminum-clad core boards for high power LEDs, flexible copper clads (FCCL), and rigid-flex configurations up to 32 layers.
From complex medical scanners to rugged automation equipment controllers, browse our manufacturing portfolio engineered to satisfy the highest reliability standards.
STHL PCBA
