High-speed turnaround assemblies currently produced in our state-of-the-art facilities
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.
Modern micro-electronics demand micro-component integration. At STHL, our machines operate with high dimensional and optical precision to deliver zero-defect manufacturing outcomes.
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 Automated Optical Inspection (AOI) and high-resolution X-Ray inspection, to guarantee flawless assembly across high-density circuit configurations.
For industrial applications demanding high mechanical load limits, thermal stability, and ultimate ruggedness, Through-Hole technology remains a structural pillar. STHL PCBA excels in combined SMT and THT workflows.
Our specialized THT assembly services encompass:
Providing comprehensive value from layout, parts procurement, and rigid/flexible PCBA production to final enclosure integration
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 and fully qualified.
Fulfilling the complex operational requirements of critical industrial, energy, and clinical infrastructure
Wind turbines and solar inverter control systems operate under severe outdoor conditions. Thermally stressed systems require heavy-copper PCBs, thermal via engineering, and high-vibration resistant component layout. STHL designs specific test beds to qualify these assemblies for continuous grid operation, extreme temperatures, and dynamic high-power switching cycles.
With ISO 13485 alignment, STHL manages the manufacturing variables of digital X-ray processing systems and wireless biometric monitors. Precision trace impedances, signal shielding, and low electromagnetic emission profiles are guaranteed through structural testing. Every component undergoes pedigree screening to safeguard life-critical equipment operations.
Urban surveillance networks, smart dimmer switches, and communication hotspots form the backbone of modern utility management. STHL delivers compact, cost-efficient, and multi-layered board structures that integrate BLE, Wi-Fi, and 5G transceiver modules. Advanced RF testing parameters verify maximum signal integrity and minimized insertion loss.
Navigating the complex international trade standards and quality barriers requires deep manufacturing control. At STHL, our engineering team ensures that every stage of development aligns with the strict requirements of key target markets across North America, Europe, and the APAC region.
Our quality matrix begins with the raw substrate qualification and continuous environmental validation. Every rapid PCB batch manufactured must respect global directives:
Rapid assembly projects depend heavily on component availability. When local component supplies face limits or lead times extend, production risk climbs. STHL counters this instability through an established global sourcing matrix.
Our component engineers utilize advanced component databases to track life-cycle phases, warning designers of end-of-life (EOL) components before assembly begins. With an extensive supplier network across Europe, the US, and Asia, we source obsolete or restricted microchips from qualified, authorized distributors.
All inbound component parts undergo inbound quality inspections (IQC), including component testing and microscopic analysis, to ensure no counterfeit parts enter the production line. This supply pipeline resilience keeps your rapid PCB projects on schedule, preventing delays in time-to-market execution.
Our strategic investments to address the processing challenges of next-generation hardware designs
Direct engineering answers to technical queries regarding rapid assembly capabilities
A: STHL uses integrated workflows where DFM (Design for Manufacturability) analysis runs concurrently with component procurement. Fast automated stencil tooling, modular SMT feeders, and optimized line programming ensure fast changeovers. Parallel line architectures also prevent prototyping runs from blocking volume production.
A: Every BGA assembly undergoes automatic 3D-AOI checks followed by high-resolution transmission X-ray inspection. This detects solder bridging, void ratios, micro-cracks, and head-in-pillow defects that are invisible to optical cameras.
A: Yes. Our engineering team reviews bills of materials (BOMs) and suggests pin-compatible, functionally equivalent alternatives from verified component partners. These options are submitted for client review prior to manufacturing.
A: Our facilities are ESD-shielded with monitored ground points and protective apparel requirements. Our manufacturing processes utilize lead-free solder paste and flux systems that comply with EU RoHS/REACH standards, ensuring complete process safety for critical electronics.
Explore our diverse manufacturing spectrum covering industrial, commercial, and medical platforms
STHL PCBA
