Explore our high-precision PCB assemblies engineered for automotive, medical, industrial, and consumer applications globally.
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 wordlwide.
Welcome to visit STHL factory at any time. We are committed to absolute transparency and quality verification in every production run.
How our manufacturing lines handle ultra-fine pitches, hybrid boards, and strict mechanical integrity standards.
Our surface mount technology lines are optimized for high-speed, high-accuracy component placement across diverse substrates. We utilize standard and custom thermal profiles to guarantee joint integrity across multiple reflow stages.
Despite the dominance of SMT, Through-Hole Technology remains critical for power supplies, heavy industrial gear, and high-vibration systems. STHL maintains a highly structured THT manufacturing cell.
From board fabrication and complex component sourcing to complete product build and validation.
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-flexPCB, 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 PCBAinto 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.
An in-depth analysis of supply chain integration, engineering localization, and compliance frameworks for global OEMs.
The electronic equipment manufacturing industry is highly dependent on speed and availability of physical inputs. Operating in Shenzhen places STHL at the heart of the world's most dense electronic cluster. The localized supply chain ecosystem means that bare PCBs, complex silicon, passives, structural plastics, custom metal stampings, and connectors are all sourced within a 50-kilometer radius. This proximity reduces component transit times from weeks to hours.
For global procurement teams, this reduces working capital requirements. Sourcing components through a Chinese EMS partner like STHL mitigates the friction of multi-country logistics coordination during the early prototype and NPI (New Product Introduction) phases. Our local presence allows us to interact directly with original component manufacturers (OCMs) and authorized regional agents, guaranteeing faster resolution of technical discrepancies and component allocation issues.
A key element of successful electronic contract manufacturing is Design for Manufacturability (DFM). When raw schematic designs and Gerber files are generated in Europe or North America, they must be parsed for local manufacturing capabilities. Our engineering team acts as a bridge, checking for:
Modern global markets require rigorous safety and process compliance. STHL operates under an advanced Quality Management System certified by international governing bodies.
Our IATF 16949 Certification ensures that automotive-grade assemblies (such as in-vehicle Bluetooth devices and Inertial Measurement Units) undergo strict Failure Mode and Effects Analysis (FMEA) and Statistical Process Control (SPC).
For medical equipment, our ISO 13485 Certification dictates strict record tracking and raw material traceability, assuring that portable ultrasound systems and pulse oximeter boards are fully validated and trace-auditable back to the chemical batch of the solder paste.
Meeting the demands of next-generation hardware through precision engineering and advanced system integration.
The transition to renewable energy systems requires high-reliability PCB assemblies capable of managing high-current paths, thermal dissipation, and precise voltage balancing. Our BMS assemblies are built with heavy-copper PCBs, thick-film resistors, and advanced thermal interface materials (TIMs) to ensure long-term stability in electric vehicles and solar street light controllers.
Avionics and high-performance industrial sensors require unparalleled stability under extreme mechanical stress. Products like Air Data Computers (ADC), Inertial Measurement Units (IMU), and Air Data Inertial Reference Units (ADIRU) are manufactured with highly controlled soldering processes, underfill coatings, and extensive burn-in testing to guarantee flawless operation under high vibration and extreme temperature fluctuations.
Medical hardware like portable ultrasound systems and pulse oximeters demand continuous calibration and component reliability. Under our ISO 13485 framework, we guarantee cleanroom assembly conditions, ESD controls, and automated optical and X-Ray inspections to eliminate any possibility of open joints or microscopic solder voids that could lead to signal degradation.
Smart home components, including video doorbells, intercoms, and ecological monitoring platforms, rely on compact, power-efficient, RF-optimized layouts. We execute precise impedance control tests and build advanced shielding enclosures during the box build phase to prevent electromagnetic interference (EMI) and ensure high wireless transmission range.
Critical information for procurement directors, product engineers, and hardware designers.
Browse our advanced electronics manufacturing capabilities across specialized monitoring and medical applications.
STHL PCBA
