Explore our premium SMT and THT capabilities engineered for industries requiring extreme operational reliability.
Shenzhen STHL is a premier 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 Surface Mount Technology (SMT) is the backbone of high-performance electronics. At STHL, our engineering team manages precision component placements down to micro-level specifications, guaranteeing high mechanical reliability and electrical integrity.
Our commitment to quality goes beyond component expertise. We utilize advanced inspection techniques, including AOI (Automated Optical Inspection) and X-Ray inspection, to guarantee flawless solder joints and complete package alignment.
While SMT dominated high-density modules, THT remains critical for power transmission, high thermal dissipation boards, and rugged industrial applications. STHL PCBA also excels in Through-Hole Technology (THT) assembly, deploying advanced waves and custom tooling.
From design analysis to direct shipment, we offer complete end-to-end support for custom electronics development.
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 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.
Understanding the unique structural and technical advantages that make China-based factories the leading choice for global OEM/ODM corporations.
The concentration of raw material fabricators, semiconductor distributors, and passives manufacturers in Shenzhen creates a unique operational ecosystem. At STHL, our strategic location allows us to achieve turnaround times that are virtually impossible elsewhere. While Western fabs may take 2 to 3 weeks for component acquisition due to fragmentation, we can complete full BOM sourcing in as little as 3 to 5 days.
This density drastically reduces freight overheads and minimizes localized logistics delays. Coupled with advanced automation, China-based SMT factories achieve unmatched scale economies, allowing high-mix low-volume (HMLV) orders to benefit from the same high-tier equipment typically reserved for million-unit production runs.
The electronics manufacturing services industry is moving through a rapid evolutionary cycle. Five major trends define high-quality SMD manufacturing today:
Different applications call for radically different manufacturing parameters. We engineer distinct pipelines based on your application scenario:
Requires strict compliance with the IATF 16949 quality standard. SMT joints must endure extreme vibration and heat cycles. We employ high-reliability SAC305 solder alloys and selective conformal coating to guard against humidity and chemical ingress.
Certified under ISO 13485. For life-support devices like anesthesia machines, zero-fault tolerance is mandatory. We provide 100% X-Ray testing of all BGA and leadless packages, supplemented by physical functional test setups simulating real-world patient vitals.
Requires IPC Class 3 compliance. High-temperature laminates, double-sided conformal coatings, and thermal stress tests are applied to guarantee long-term stability in extreme atmospheres.
Used in solar controllers and wind power hubs. Key features include heavy-copper PCBs (up to 4oz) to handle high current loads, requiring precise thermal profiling during reflow and wave soldering to prevent delamination.
Procuring PCB assembly services internationally requires strict risk-management strategies. Standardizing on the following four pillars ensures project success:
Everything you need to know about SMD Manufacturing, SMT Quality Control, and global logistics support at STHL.
STHL is fully certified to IATF 16949 (Automotive Quality Management), ISO 13485 (Medical Devices), ISO 9001 (Quality Systems), and ISO 14001 (Environmental Standards). All of our assembly lines run in strict compliance with RoHS and IPC-A-610 Class II and Class III standards.
We source components from verified, franchise distributors (such as Arrow, Avnet, Digi-Key, and Mouser) or directly from component manufacturers. For components requested from independent distributors, we conduct thorough incoming inspection, including microscopic analysis, acetone testing, and X-ray comparisons to guarantee 100% authenticity.
We offer a wide range of test services, including Automated Optical Inspection (AOI), 3D X-Ray Inspection (AXI) for BGA/QFN components, In-Circuit Testing (ICT), Flying Probe Testing, and Custom Functional Testing (FCT). We work closely with our clients to design custom test fixtures and functional parameters.
Yes, we provide flexible manufacturing services. We can run small, high-mix prototypes for NPI (New Product Introduction) cycles, as well as handle large-scale, high-volume production across our 7 automated high-speed SMT lines.
For standard prototype orders with parts in stock, we can assemble and test boards in 3 to 5 working days. For mass production turn-key orders (including PCB fabrication, component sourcing, and assembly), typical lead times range between 4 to 6 weeks depending on component availability and custom enclosure logistics.
Absolutely. We operate 7 high-speed SMT lines along with 2 dedicated DIP/THT lines. This allows us to handle double-sided SMT reflow followed by automated wave soldering or hand soldering for delicate through-hole connectors on mixed-technology boards.
Browse our specialized modules manufactured under strict quality standards for heavy machinery, smart utilities, and power electronics.
STHL PCBA