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 worldwide. Welcome to visit STHL factory at any time.
Surface Mount Technology (SMT) is the backbone of modern electronics. Our high-speed placement lines achieve optimal precision even for high-density interconnect projects. We handle a wide range of advanced components, including:
Our commitment to quality goes beyond component expertise. We utilize advanced inspection techniques, including AOI (Automated Optical Inspection) and 3D X-Ray Inspection, to guarantee flawless assembly and structural reliability under thermal pressure.
While SMT dominated miniaturization, THT remains essential for high-stress interfaces, high-power modules, and mechanical robustness. STHL PCBA excels in Through-Hole Technology (THT) assembly. Our services encompass:
The global printed circuit board assembly (PCBA) sector is currently transitioning through a paradigm shift. Rising component complexities, shorter product lifecycles, and localized supply chain constraints make obtaining a fast, accurate OEM PCB quote more than just a matter of price—it is a critical phase of hardware design engineering.
Raw materials fluctuate due to copper clad laminate (CCL) supply chains. Modern quotes must evaluate substrate alternatives like FR-4 (high TG), Rogers, and ceramic cores early to optimize system expenditures.
With global semiconductor changes, real-time BOM analysis prevents design lock-ins on obsolete components. STHL utilizes API-linked sourcing to track real-time manufacturer lead times and availability.
Smart devices require high layer counts, microvias, and rigid-flex configurations. Modern manufacturing must adapt to handle ultra-high frequency signal layouts and fine pitch margins.
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 electrical 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, fully qualified, and ready for deployment.
As electronic boards scale down and logic speeds escalate, the boundary between design and manufacturing becomes blurred. At STHL, our engineering team mitigates assembly faults during the quotation phase through advanced Design for Manufacturing (DFM) guidelines.
Ensuring continuous transmission speeds in IoT and telecom boards via customized trace layouts and specialized dielectric selections.
Utilizing copper vias, aluminum backplanes, and strategic thermal routing for high-brightness LEDs and vehicle control systems.
Routing fine-pitch BGAs down to 0.4mm pitch using blind and buried microvias, avoiding crosstalk and mechanical failures.
Different industries maintain distinct compliance frameworks and stress profiles. A simple consumer board cannot survive in a deep-well industrial drill or inside an automotive sensor array. STHL adapts assembly rules to these stringent needs:
Compliant with IATF16949 standards, we engineer T-Boxes, ADAS autopilot cards, and dashboard systems that endure thermal cycling, vibration, and moisture ingress.
Ensuring reliable diagnostic components under ISO13485 constraints. From blood pressure monitors to specialized therapeutic equipment, stability is our primary focus.
High-voltage isolation, thick-copper power routing, and robust mechanical structures designed for harsh environments, such as deep-well drilling platforms.
To receive an accurate and timely OEM PCB quote, you should provide: (1) ODB++ or Gerber RS-274X files, (2) A complete Bill of Materials (BOM) detailing manufacturer part numbers (MPNs), quantities, and package types, (3) Assembly drawings indicating critical components, polarities, and dimensional constraints, and (4) Test protocols if you require full functional testing (FCT).
We maintain strict component procurement policies. Our component sourcing team buys directly from original component manufacturers (OCMs) or authorized franchises like Digi-Key, Mouser, and Arrow. For hard-to-find components, we utilize trusted, audited suppliers and run incoming visual, X-ray, and electrical testing to ensure authenticity.
Yes, STHL is fully compliant with RoHS and REACH regulations. We operate dedicated lead-free wave soldering and reflow lines to ensure no cross-contamination occurs for projects requiring strict environmental compliance.
Every PCBA leaving our facility undergoes automated optical inspection (AOI). For BGA and micro-component boards, we utilize X-Ray inspection to test for voiding and alignment. We also conduct In-Circuit Testing (ICT), custom functional testing (FCT) based on customer test fixtures, and thermal aging to simulate field operation.
STHL PCBA
