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. Welcome to visit STHL factory at any time.
From prototype to mass production, STHL delivers end-to-end electronics manufacturing solutions — engineered for quality, speed, and global reliability.
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.
We can handle a wide range of advanced components with precision engineering and rigorous quality inspection at every stage of the SMT assembly process.
STHL PCBA excels in Through-Hole Technology (THT) assembly, combining manual craftsmanship with automated precision to deliver superior results across all THT component types.
STHL follows a rigorous, multi-stage production and quality control process to ensure every PCBA board meets the highest industry standards before delivery.
Our engineers perform thorough Design for Manufacturability (DFM) analysis to identify and resolve potential issues before production begins.
All components are sourced from certified suppliers. Each part is verified for authenticity, specifications, and compliance before entering the production line.
Advanced SMT pick-and-place machines and skilled THT technicians ensure precise component placement with lead-free RoHS-compliant soldering.
Automated Optical Inspection (AOI) systems scan every board for solder joint defects, missing components, and misalignments with zero tolerance.
X-Ray inspection is applied to BGA and hidden solder joints, providing deep-level quality assurance that visual inspection cannot achieve.
In-Circuit Testing (ICT) and Functional Testing (FCT) verify electrical performance and product functionality to ensure 100% qualified delivery.
Environmental stress testing, thermal cycling, and burn-in tests are conducted to validate long-term product reliability under real-world conditions.
Finished products are carefully packaged with ESD protection and anti-static materials, then shipped with full traceability documentation worldwide.
STHL holds internationally recognized certifications that demonstrate our unwavering commitment to quality, environmental responsibility, and industry-specific compliance across all manufacturing operations.
Automotive Quality Management System certification — meeting the most stringent quality standards for automotive electronics manufacturing.
International standard for Quality Management Systems, ensuring consistent product quality and continuous process improvement across all operations.
Environmental Management System certification — STHL is committed to sustainable manufacturing practices and minimizing environmental impact.
Medical Device Quality Management System — enabling STHL to manufacture electronics for the highly regulated medical device industry worldwide.
STHL's versatile electronics manufacturing capabilities serve a broad spectrum of industries, delivering reliable PCBA solutions for the world's most demanding applications.
With 20 years of proven excellence, STHL delivers measurable advantages that help global customers reduce costs, accelerate time-to-market, and achieve superior product quality.
Founded in 2006, STHL has built an unrivaled track record in electronics contract manufacturing. Our two decades of experience mean we've encountered — and solved — virtually every manufacturing challenge our customers face.
AOI, X-Ray, ICT, and FCT inspection systems ensure zero-defect delivery. Our multi-stage quality control process catches issues before they reach your customers.
From PCB layout and component sourcing to box build assembly and final testing — STHL is your single-source partner for the complete electronics manufacturing value chain.
Our established global supplier network and procurement expertise ensure you get genuine, certified components on time, even during component shortages and market disruptions.
IATF16949, ISO9001, ISO14001, and ISO13485 certifications demonstrate our commitment to quality across automotive, medical, industrial, and consumer electronics sectors.
With 7 SMT lines and flexible production scheduling, STHL efficiently scales from quick-turn prototypes to high-volume mass production without compromising quality or lead time.
STHL's electronics manufacturing services reach customers across 90+ countries and regions worldwide. Our global supply chain infrastructure enables us to source components efficiently and deliver finished products reliably to any destination.
Our customers span North America, Europe, South America, Asia-Pacific, and beyond — trusting STHL as their long-term, reliable PCBA manufacturing partner. Our experienced international trade team ensures smooth communication, customs compliance, and on-time delivery for every order.
STHL's 10,000 sqm state-of-the-art manufacturing facility in Shenzhen, China is equipped with the latest SMT and THT assembly equipment, advanced inspection systems, and a fully controlled production environment. Welcome to visit us at any time.
STHL is recognized as a long-term, reliable PCBA vendor by customers worldwide. Here's what some of our valued partners have to say about working with us.
"STHL has been our trusted PCBA manufacturing partner for over 5 years. Their quality control is exceptional — we consistently receive boards with zero defects. Their engineering team is highly responsive and proactive in identifying potential issues during DFM review."
"We've worked with many EMS providers across Asia, but STHL stands out for their transparency, communication, and technical expertise. Their IATF16949 certification gives us the confidence we need for automotive-grade PCBA production."
"From prototype to full production, STHL delivered on time and within budget. Their component sourcing team helped us navigate a difficult supply shortage, and their box build assembly service simplified our entire supply chain significantly."
Contact our expert engineering team today for a free consultation, DFM analysis, and competitive quote. We serve customers in 90+ countries with fast response and reliable quality.
STHL PCBA