Explore our high-precision PCB assembly capabilities across diverse industrial, medical, and consumer applications.
In the rapidly evolving electronics manufacturing services (EMS) sector, the demand for Full Turnkey Assembly has transitioned from a cost-saving option to a strategic imperative. Modern hardware developers, OEMs, and enterprise brands are facing unprecedented supply chain complexities, shrinking product lifecycles, and strict regulatory standards. A full turnkey model addresses these challenges by consolidating component sourcing, PCB fabrication, SMT (Surface Mount Technology), THT (Through-Hole Technology), box-build integration, and functional testing under a single, highly accountable manufacturer.
Globally, industrial sectors such as automotive electrification, medical diagnostics, renewable energy grid management, and IoT smart infrastructure require extreme reliability. By outsourcing the entire lifecycle to a certified turnkey factory, companies eliminate the friction of managing multiple vendors, minimize logistics overhead, and dramatically accelerate their Time-to-Market (TTM). This integrated approach ensures that design-for-manufacturability (DFM) feedback is applied instantly, preventing costly errors before mass production begins.
"Turnkey manufacturing is no longer just about assembly; it is about establishing a resilient, transparent, and digitally integrated supply chain that acts as an extension of your engineering team."
Shenzhen STHL is a high-quality provider of electronics manufacturing services (EMS) in China, serving customers worldwide along the entire industry chain. Our capabilities span PCB layout, component sourcing, PCB fabrication, PCBA assembly, cable assembly, box build assembly, and comprehensive testing services.
Established in 2006, STHL has built 20 years of experience in electronics contract assembly manufacturing. Currently, our team consists of over 220 highly skilled staff members. Our state-of-the-art 10,000 sqm facilities house 7 automated SMT assembly lines, 2 DIP/THT lines, 2 function testing lines, and 2 finished device assembly lines.
We provide electronics assembly services for energy power, communications, automotive, medical, consumer electronics, computers & storage, safety & security, commercial, and industrial products. Our global customer base spans the USA, Germany, Italy, UK, Poland, New Zealand, Argentina, Brazil, Turkey, Korea, Thailand, and 90 other regions worldwide.
As an IATF16949, ISO9001, ISO14001, and ISO13485 certified electronics assembly manufacturer, we produce products that strictly comply with RoHS standards. Based on our excellent engineering and production capacities in technical areas such as materials analysis & storage, advanced equipment, and reliability testing (AOI, X-RAY, ICT test, and function test), we are recognized as a long-term reliable PCBA vendor globally.
From initial design verification to final product packaging, we offer a seamless suite of services designed to ensure quality and efficiency.
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 single-sided to complex multi-layers, and 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 industrial applications.
Making your projects at STHL from SMT assembly to box build assembly is highly cost-effective and fast to market. We cover everything from putting a PCBA into the enclosure with all functions tested to a complete product assembly packaged and ready for delivery.
STHL conducts functional testing (FCT) to verify product performance, preventing defects such as circuit issues, missing components, or incorrect placements. This ensures delivered products are stable and fully qualified.
Our SMT lines are equipped to handle a wide range of advanced components, ensuring high-density placement and robust solder joint integrity. We specialize in:
Our commitment to quality goes beyond component expertise. We utilize advanced inspection techniques, including Automated Optical Inspection (AOI) and 3D X-Ray inspection, to guarantee flawless assembly and detect hidden solder voids or bridges.
STHL also excels in Through-Hole Technology (THT) assembly, which remains critical for high-power, high-stress, and mechanically demanding applications. Our services encompass:
How STHL is adapting to the future of smart manufacturing, IoT integration, and green technology.
We are integrating Industry 4.0 standards into our assembly lines. By utilizing real-time Manufacturing Execution Systems (MES), we track component usage, machine efficiency, and quality metrics in real-time, ensuring full traceability for critical medical and automotive products.
To combat global component shortages, STHL has established a digital supply chain network. We utilize predictive analytics to identify lead-time risks and secure alternative, manufacturer-approved components before production bottlenecks occur.
Environmental stewardship is central to our roadmap. We are continuously optimizing our energy consumption, expanding our lead-free (RoHS) capabilities, and implementing zero-waste-to-landfill initiatives across our 10,000 sqm facility.
Tailored turnkey manufacturing solutions designed to meet the unique regulatory and technical demands of key global sectors.
The automotive industry requires zero-defect manufacturing. STHL provides high-reliability PCBA for On-Board Chargers (OBC), Electronic Control Units (ECU), and EV charging stations. Our IATF 16949 certification ensures that every process, from solder paste inspection to thermal cycling tests, meets rigid automotive safety standards.
Medical electronics require absolute precision and long-term stability. Certified under ISO 13485, we manufacture PCBA for operating room video monitoring systems, diagnostic equipment, and patient monitoring systems. We offer full component traceability and rigorous functional testing to guarantee patient safety.
From wastewater monitoring systems to gas leak detectors and noise monitoring devices, industrial IoT equipment must withstand harsh environments. We offer conformal coating services, ruggedized box builds, and environmental stress screening (ESS) to ensure long-term durability in the field.
We support the global transition to clean energy by assembling high-power control boards for wind turbines, photovoltaic power generation systems, and advanced Battery Management Systems (BMS). Our THT and SMT combination lines are optimized for handling high-current and high-voltage components.
Get answers to common questions about our full turnkey assembly services, quality standards, and sourcing policies.
Full Turnkey Assembly means we handle the entire manufacturing process from start to finish. This includes PCB fabrication, electronic component sourcing, SMT and THT assembly, cable assembly, box-build enclosure integration, final functional testing, and packaging. You only need to provide the Gerber files and Bill of Materials (BOM).
We have a strict vendor qualification system and source components directly from original manufacturers (OCMs) or authorized distributors (such as Arrow, Avnet, Digi-Key, and Mouser). For hard-to-find parts, we utilize advanced testing, including X-ray inspection and electrical performance verification, to prevent counterfeit components from entering production.
STHL is certified under IATF 16949 (Automotive Quality Management), ISO 13485 (Medical Devices Quality Management), ISO 9001 (General Quality Management), and ISO 14001 (Environmental Management). All our assembly processes comply with IPC-A-610 standards and RoHS directives.
Yes, our 7 SMT lines and dedicated DIP lines are highly flexible. We can process low-volume prototype runs for design verification (NPI) and seamlessly scale up to high-volume mass production within the same facility, ensuring consistency and knowledge transfer.
We perform 100% Automated Optical Inspection (AOI) on all boards. Additionally, we offer 3D X-Ray inspection for BGA/QFN packages, In-Circuit Testing (ICT), Functional Testing (FCT) using custom-built test fixtures, and environmental burn-in testing upon request.
Discover our specialized assemblies engineered for high-performance control, energy, and communication systems.
STHL PCBA