01Component Procurement
BOM review, alternate-part proposals for obsolete or long-lead items, and purchasing through 100+ agents and suppliers with lot-level traceability.
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Watch: Inside the STHL SMT workshop 2006Founded in Shenzhen
20 years in EMS
20 years in EMS
About STHL · Shenzhen, China 
Custom PCBA Manufacturer & Turnkey Electronics Assembly Partner
Shenzhen STHL Electronics Co., Ltd. is an electronics manufacturing services (EMS) provider founded in 2006. We give OEMs, hardware start-ups and industrial brands one accountable supply chain: PCB layout, component sourcing, PCB fabrication, SMT and THT assembly, cable assembly, box build and full functional testing.
Our 10,000+ m² facility in Bao'an, Shenzhen runs 7 SMT lines, 2 DIP/THT lines, 2 functional test lines and 2 finished-device assembly lines, staffed by 220+ people including 50+ engineers. Every work order is traced through ERP and MES systems—from incoming material to the outgoing carton.
We currently build for customers in the USA, Germany, Italy, the UK, Poland, New Zealand, Argentina, Brazil, Turkey, Korea, Thailand and 90+ other countries and regions.
- Founded
- 2006, Shenzhen
- Team
- 220+ staff, 50+ engineers
- Production Lines
- 7 SMT · 2 THT · 4 Test/Box
- Order Size
- No MOQ, prototype to volume
STHL manufacturing capacity in numbers
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Years of EMS Experience
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Manufacturing Facility
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Professional Engineers
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Production & Test Lines
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On-Time Delivery Rate
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Qualified Shipment Rate
Integrated EMS Services
End-to-End PCB Assembly Services from One Accountable Supplier
Splitting fabrication, sourcing and assembly across vendors adds hand-offs, freight and finger-pointing. STHL keeps the whole build under one quality system, so you get a single quote, a single schedule and a single point of responsibility.
01
02PCB Fabrication
Standard FR-4, flex, rigid-flex, HDI, aluminum, Rogers, ceramic, thick copper, high-Tg and halogen-free boards built to your stack-up.
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03PCB Assembly (SMT / THT)
Surface-mount, through-hole and mixed-technology assembly including BGA, from quick-turn prototypes and low volume to high-volume production.
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04Value-Added Services
IC programming, conformal coating, functional testing, cable and wire harness assembly and complete box build—shipped ready for your end customer.
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How Your Project Moves from BOM to Shipment
Each stage has a defined owner, a quality gate and a record in our MES system, so you always know where your boards are and what has been verified.
STEP 01
NDA & DFM Review
NDA signed before RFQ. Engineers check Gerber, BOM and centroid files and return DFM/DFA feedback.
STEP 02
Component Sourcing
Parts purchased from qualified channels, inspected on arrival and logged for traceability.
STEP 03
PCB Fabrication
Bare boards produced to your stack-up, surface finish and impedance requirements.
STEP 04
SMT & THT Assembly
Paste printing, placement and reflow, followed by through-hole insertion and soldering.
STEP 05
Inspection & Testing
Optical and X-ray inspection for hidden joints, plus functional testing to your test plan.
STEP 06
Box Build & Packing
Coating, programming, enclosure integration and ESD-safe packaging.
STEP 07
Global Delivery
Shipped worldwide with a 99.5% on-time delivery record.
For Sourcing Engineers
PCBA Capability Overview at a Glance
Use this summary to check whether STHL fits your project before you send files. It reflects the services and systems we run in production today, not a marketing wish list.
Exact tolerances, lead times and test coverage depend on your design. Send your Gerber, BOM and pick-and-place files and our engineers will confirm feasibility in writing.
| Order volume | Prototype, low-volume and high-volume builds — no minimum order quantity |
|---|---|
| Assembly technology | SMT, THT (DIP), mixed technology, BGA assembly, single- and double-sided placement |
| PCB types | Standard FR-4, flexible, rigid-flex, HDI, aluminum, Rogers, ceramic, thick copper, high-Tg, halogen-free |
| Component sourcing | Turnkey or customer-supplied parts; access to 500k+ part numbers via 100+ agents and suppliers |
| Value-added services | PCB layout, IC programming, conformal coating, cable & wire assembly, box build |
| Testing | Inspection & functional testing on 2 dedicated test lines, built around your test specification |
| Quality systems | IATF 16949 · ISO 9001 · ISO 13485 · ISO 14001, with ERP & MES traceability |
| Performance | 99.5% on-time delivery · 99% qualified shipment rate |
| Confidentiality | NDA signed before RFQ review |
Why STHL
Why Global Buyers Choose STHL as Their PCBA Partner
Overseas buyers tell us their biggest risks are hidden quality gaps, unreliable lead times and IP exposure. These are the safeguards we put in place against each one.
10,000+ m² highly automated, dust-free factory
20 years of PCB & PCBA manufacturing experience
Global sourcing: 500k parts via 100+ agents & suppliers
Certified: IATF 16949, ISO 9001, ISO 14001, ISO 13485
ERP & MES system tracking for full traceability
Engineering team focused on cost-down proposals
No MOQ: prototypes and large-quantity orders
NDA signed before RFQ to protect your IP
Fast, predictable delivery worldwide
Industries We Serve
PCBA Applications for High-Reliability Industries
From automotive electronics to medical devices and IoT products, each market has its own compliance and reliability expectations. Our certifications and process controls are built around them.
Medical & Healthcare
Built under an ISO 13485 quality system with documented traceability for device makers.
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Automotive Electronics
IATF 16949 certified processes for control modules, lighting and in-vehicle electronics.
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Computer & Storage
High-density boards with BGA and fine-pitch components for computing hardware.
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Industrial Control
Robust assemblies for automation, motor drives and long-life industrial equipment.
View solution Virtual Factory Audit
Take a 360° Virtual Tour of the STHL Factory
Can't fly to Shenzhen yet? Walk through our SMT, THT, testing and assembly areas online and see the equipment and workflow behind your boards.
Cooperation Network
Cooperative Brands & Component Supply Partners
Brands we have cooperated with and the component channels behind our sourcing program.
Authority & Compliance
Certified Quality Management Systems
Independent third-party audits verify that our processes meet the requirements of the automotive, medical and environmental standards your customers expect. Click a certificate to view it in full.
ISO 9001
Quality management system covering design, sourcing and production.
IATF 16949
Automotive quality standard for defect prevention and supply chain control.
ISO 13485
Medical device quality management with documented traceability.
ISO 14001
Environmental management for responsible, compliant manufacturing.
Customer Experience
What Engineers and Buyers Say About STHL
Feedback from hardware engineers and business owners across North America, Europe, South America and Asia-Pacific.
Excellent team to work with and fast delivery with high-quality boards. We are very happy to work with such a good supplier. Thanks again.
PauloR&D Engineer · United States
Please extend my thanks to your team for the hard work in preparing these samples. This experience has strengthened my confidence in your company, and I look forward to discussing bulk orders soon.
OliviaHardware Engineer · Germany
We are satisfied with the last order. You did a great job on those boards and the lead time was short. I will place a new order soon.
WilliamCEO · Italy
The order was perfect—exactly as specified, with top quality. Highly recommend this reliable supplier.
DmitryCEO · Brazil
Very fast delivery, professional supplier and professional product. We will place a new order very soon!
SohiabHardware Engineer · Turkey
We have tested all the boards and I am highly pleased. I will repeat my order soon. Thank you again for your excellent service.
AnnaSr. Hardware Designer · New Zealand
It's always a pleasure ordering. Very professional team and good quality—thanks for your great service.
JohnsonR&D Engineer · United States
Satisfied with the sample products delivered. Very good product, quick delivery and a good understanding of my requirements.
SarahHardware Engineer · United Kingdom
Their professionalism shows in seamless communication, efficient processing and reliable service. A trustworthy and commendable partner.
Dmitry IvanovCEO · Romania
Buyer Questions
PCBA Sourcing FAQ
Straight answers to the questions overseas purchasing and engineering teams ask most before qualifying a new PCB assembly supplier.
What PCBA services does STHL provide?
We cover the full electronics manufacturing chain: PCB layout, component sourcing, PCB fabrication, SMT and THT assembly, BGA assembly, IC programming, conformal coating, cable and wire harness assembly, box build and functional testing.
Is there a minimum order quantity (MOQ)?
No. We accept prototype, low-volume and high-volume orders, so you can validate a design with a small batch and scale on the same lines and quality system.
Which quality certifications does STHL hold?
IATF 16949 (automotive), ISO 9001 (quality management), ISO 13485 (medical devices) and ISO 14001 (environmental management). Work orders are traced through ERP and MES systems.
How do you protect my design files and IP?
We sign a Non-Disclosure Agreement before RFQ review, so your Gerber files, BOM and firmware are protected before any engineering evaluation begins.
What files do you need to start a PCBA project?
Typically Gerber files, a BOM with manufacturer part numbers, a pick-and-place (centroid) file, assembly drawings and your test requirements. Our engineers return DFM feedback before production starts.
Which countries do you ship to?
We ship to the USA, Germany, Italy, the UK, Poland, New Zealand, Argentina, Brazil, Turkey, Korea, Thailand and 90+ other countries and regions, with a 99.5% on-time delivery record.
Engineering Insights
Latest PCBA Manufacturing Insights
Practical articles from our production and quality teams on process control, cost reduction and what really happens on the factory floor.
Next Step
Get the STHL PCBA Capability Catalog
See our full equipment list, process capabilities, certifications and industry case studies in one document—ideal for supplier qualification and internal review.