Explore our advanced manufacturing capabilities across critical industrial, medical, and green energy applications.
Shenzhen STHL is a high-quality provider of electronics manufacturing services (EMS) in China, serving 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.
Established in 2006, STHL brings 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 come from the USA, Germany, Italy, UK, Poland, New Zealand, Argentina, Brazil, Turkey, Korea, Thailand, and other 90 regions of the world.
As an IATF16949, ISO9001, ISO14001, and ISO13485 certificated electronics assembly manufacturer, we produce products exactly complying with RoHS standards and quality guarantees. 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), highly 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.
Surface Mount Technology (SMT) is the backbone of modern high-density electronics. At STHL, we leverage advanced automated placement systems to handle a wide range of complex and micro-miniature components with high precision.
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 assembly and structural integrity of solder joints.
While SMT dominates high-density designs, Through-Hole Technology (THT) remains indispensable for components subjected to mechanical stress, high power, or high voltage. STHL PCBA excels in delivering robust THT assembly services.
From design verification to final box build, we offer a complete suite of electronics manufacturing services.
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 assemblies 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 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.
Why global tech leaders choose Shenzhen STHL as their long-term electronics manufacturing partner.
Located in Shenzhen, the global epicenter of electronics manufacturing, STHL leverages a highly integrated local supply chain. We source raw laminates, specialized substrates, and electronic components within a 50-mile radius. This geographical advantage drastically reduces lead times and allows us to respond rapidly to engineering changes and component shortages.
Our facility houses state-of-the-art SMT lines capable of placing 01005 components, fine-pitch BGAs, and Package-on-Package (PoP) devices. By combining high-speed automation with rigorous quality management systems (IATF16949 for automotive, ISO13485 for medical), we deliver high-yield production runs that meet stringent international standards.
China's optimized manufacturing ecosystems allow us to offer highly competitive pricing. We pass these savings to our clients through optimized panel utilization, automated optical inspection (AOI), and in-house functional testing, ensuring that lower costs never compromise the reliability of your mission-critical PCBs.
Our engineering team performs comprehensive Design for Manufacturability (DFM) and Design for Testing (DFT) reviews before production begins. This proactive approach identifies potential layout issues, thermal management challenges, and component mismatches early, saving time and preventing costly revisions.
Staying ahead of technological shifts to support next-generation electronic designs.
As devices shrink and demand higher processing power, HDI technology with stacked and staggered microvias is becoming standard. We support multi-layer HDI designs with laser-drilled microvias, enabling high-speed signal transmission and reduced electromagnetic interference (EMI).
Rigid-flex PCBs eliminate connectors and cables, reducing weight and improving reliability in dynamic environments like aerospace, medical implants, and wearable technology. STHL provides seamless integration of flexible polyimide layers with rigid FR4 boards.
5G communications, radar systems, and high-power LED applications require specialized substrates like Rogers, Teflon, or metal-clad (aluminum) PCBs. We specialize in managing thermal dissipation and maintaining signal integrity for high-frequency RF applications.
Engineered for reliability in demanding operating environments across diverse industries.
From Electronic Control Units (ECUs) and Electronic Parking Brakes (EPBs) to Battery Management Systems (BMS) for electric vehicles, our IATF16949 certified processes ensure our PCBs withstand extreme thermal cycling, vibration, and electrical stress.
Compliance with ISO13485 is critical for life-supporting devices. We manufacture highly reliable PCBA for digital X-ray machines, telemedicine equipment, smart hearing aids, and patient monitoring systems where failure is not an option.
Our PCBs power heavy-duty industrial machinery, wind turbine control systems, and environmental monitoring equipment. Designed for continuous 24/7 operation, these boards feature robust THT components and conformal coating for harsh environments.
We manufacture specialized photovoltaic module monitors and power distribution boards that optimize energy conversion and monitor system health in real-time, supporting the global transition to clean energy.
How we guarantee reliability, traceability, and compliance for global enterprises.
Our quality management framework is built on international standards including IATF 16949 for automotive safety, ISO 13485 for medical devices, ISO 9001 for general quality management, and ISO 14001 for environmental responsibility. We employ strict component traceability systems, ensuring that every resistor, capacitor, and IC is sourced from authorized distributors and documented throughout the manufacturing lifecycle.
Mitigating supply chain risks, ensuring IP protection, and streamlining cross-border logistics.
In today's volatile market, component obsolescence and sudden lead-time extensions can halt production. STHL's dedicated procurement team works closely with global distributors (Mouser, DigiKey, Arrow) and verified local manufacturers to secure alternative parts, perform cross-reference checks, and maintain buffer stocks for long-term projects.
We understand that your Gerber files, schematics, and firmware are your most valuable assets. STHL enforces strict non-disclosure agreements (NDAs), secure internal data servers, and segmented production access to ensure your intellectual property remains fully protected.
With customers spanning North America, Europe, and Asia-Pacific, we provide multilingual engineering support and transparent project tracking. We handle all export documentation, customs clearance, and offer flexible shipping terms (FOB, EXW, DDP) to ensure hassle-free delivery to your warehouse.
All materials used in our lead-free assembly processes are fully compliant with RoHS and REACH directives. We provide complete material declarations and compliance certificates upon request, ensuring your products meet environmental regulations in target markets.
Find answers to common questions about our high-tech PCB manufacturing and assembly services.
Discover more of our specialized manufacturing services for global industrial and medical applications.
STHL PCBA
