Years Experience
SQM Plant Area
SMT Assembly Lines
Global Export Regions
Shenzhen STHL is a premier, high-quality provider of Electronics Manufacturing Services (EMS) based in the technological hub of China. We offer high-fidelity, end-to-end solutions for global OEMs across the entire supply chain, specializing in custom PCB layout, component sourcing, high-precision PCB fabrication, PCBA assembly, complex cable routing, robust box build assembly, and exhaustive quality verification.
With 20 years of expertise in electronic contract manufacturing, STHL has grown into a highly trusted team of over 220 seasoned engineers and technicians. Our state-of-the-art facility features 7 advanced automated SMT assembly lines, 2 DIP/THT lines, 2 specialized testing lines, and 2 manual and automatic finished product packaging lines.
Our operation is strictly compliant with international quality management systems including IATF16949 (Automotive), ISO13485 (Medical devices), ISO9001 (Quality systems), and ISO14001 (Environmental stewardship). All operations align directly with RoHS compliance metrics, enabling us to deliver zero-defect reliability to clients across Germany, the USA, the UK, Italy, Brazil, Poland, Korea, and beyond.
Our surface mount capabilities are built to handle ultra-dense, complex components. We feature automated high-speed pick-and-place systems capable of assembling complex packages to military and medical grade standards:
To assure perfect solder joint integrity, our SMT lines integrate automated 3D solder paste inspection (SPI), inline 3D AOI (Automated Optical Inspection), and high-resolution 2D/3D X-Ray inspection for non-destructive inner structural analysis.
Heavy duty, industrial, and power-conversion electronics require the robust mechanical strength that only Through-Hole Technology (THT) can provide. STHL maintains a dedicated, highly trained workforce alongside advanced tooling for complex hybrid configurations:
All finished THT assemblies undergo visual inspection, circuit continuity tests, and functional test protocols (FCT) matching the exact user environments.
How Shenzhen STHL leverages localized resources to deliver high-quality, high-speed OEM solutions to global enterprises.
Located in the heart of Shenzhen, the world’s largest electronics capital, STHL enjoys immediate access to high-quality component distributors, minimizing lead times and raw material delays.
With multiple SMT lines dedicated to fast prototyping and small-batch NPI, we can manufacture complex multi-layer designs in as fast as 24-48 hours from electronic gerber file verification to final dispatch.
Seamlessly transition from quick-turn prototype evaluation to mid-volume and high-volume mass production. Our modular factory processes allow for flexible capacity expansion with minimal cost impact.
Embracing modern technology requirements to future-proof smart devices and industrial IoT components.
As microchip footprints shrink, devices demand thinner lines, smaller vias, and high aspect ratios. STHL implements micro-via HDI technology to enable faster performance on reduced space footprints.
Wearables, aerospace systems, and medical diagnostics require flexible routing configurations to eliminate connectors and save weight. We manufacture rigid-flex substrates that withstand mechanical fatigue.
Global regulatory landscapes necessitate halogen-free base substrates, lead-free surface finishes (ENIG, OSP, HASL-LF), and low-carbon emission assembly operations. STHL is deeply dedicated to environmental compliance.
A single point of accountability for all design, component sourcing, electronics assembly, testing, and shipping requirements.
STHL operates 7 automated PCB assembly lines for both prototype validation and fast scale mass production. Advanced pick-and-place machines ensure highly precise components positioning and structural quality.
STHL's PCB fabrication services produce high-quality, high-layer-count printed circuit boards. From double-sided to complex 32-layer FR-4, high-frequency Rogers, flex, and rigid-flex configurations.
We provide global component supply chain logistics. Utilizing a verified network of authorized chip distributors, we mitigate counterfeit component risks, long lead allocations, and market shortages.
Precision wiring systems, connector housings, shielding foils, high-density wire harnesses, and complex terminations engineered to survive high vibration and strict environmental requirements.
Full turnkey packaging of finished electronics. From mechanical enclosure design (plastic/metal), internal cable placement, power-up testing, final configuration, labeling, and direct-to-market dropshipping.
Robust testing suites including ICT (In-Circuit Testing), boundary scans, thermal cycling chambers, and specialized software flashing to ensure every board shipped is functional out of the box.
Designing robust manufacturing pipelines that meet the unique requirements of top-tier industrial sectors.
Electronics used in critical health applications require traceable component origins, zero-failure soldering, and meticulous records. STHL's ISO13485 certification ensures a traceable production framework for advanced diagnostic imaging, patient monitoring systems, and digital X-ray processing systems.
Extreme thermal environments, constant vibrations, and rapid computing requirements necessitate IATF16949 compliant manufacturing. We build robust systems for EV battery management, autonomous driving modules, in-vehicle infotainment networks, and advanced safety alerts.
Smart factories require highly stable controllers that run non-stop. STHL builds high-voltage power supplies, wastewater analysis computers, PV monitor arrays, and motor controllers designed with premium materials to resist electrical noise, current surges, and humidity.
Get answers to critical technical and logistical questions regarding STHL's OEM Quick Turn manufacturing services.
For double-sided boards, STHL can complete PCB fabrication and basic assembly within 24 to 48 hours once design files are validated. Multi-layer high-density interconnect (HDI) structures generally take 3 to 5 business days, depending on component availability and routing complexity.
We mitigate risks by sourcing exclusively from chip manufacturers directly or through authorized global distributors (like Arrow, Avnet, Digi-Key, and Mouser). We also utilize an incoming component verification lab equipped with microscope scanning, electrical tests, and date-code validation to prevent counterfeit parts from entering production.
STHL holds active certifications for ISO9001 (Quality Management), ISO14001 (Environmental), ISO13485 (Medical Devices), and IATF16949 (Automotive Industry). All assembly procedures conform to IPC-A-610 Class II and Class III standards, and final products are RoHS compliant.
Yes, we specialize in high-density components, including fine-pitch BGAs (down to 0.3mm pitch), CSP, QFN, QFP, and Package-on-Package (PoP) assemblies. Solder joints are inspected using automated 3D X-Ray systems to confirm perfect alignment and avoid internal voids or bridges.
No, we have no MOQ requirements. We support hardware startups and enterprise NPI teams with small prototype runs starting at 1 unit, offering the same level of engineering review and quality assurance as we do for 100,000+ unit mass production runs.
STHL PCBA
