One - stop EMS Solution Provider

PCB Assembly Supplier

Zero Defects & Fast Service

KFEMS is a Chinese printed circuit board (PCB) assembly company established in 2012.
We have provided one-stop custom PCB assembly services to 1000+ customers worldwide.

Printed Circuit Board Assembly Services

Turn-Key PCB Assembly

PCB design, manufacturing, components procurement, assembly, functional test one-stop service.

Components Purchasing

The professional procurement team has more than 6 years of electronic component procurement experience.

Low & Hight Volume PCB Assembly

Flexible production capacity supports both low volume (1-1000 pcs) and high volume (more than 1000 pcs) PCB assembly.

Quick Turn Prototypes PCB Assembly

Best low cost prototype PCB assembly services. Free DFM & DFA Check


KFEMS strictly adheres to the standards of IPC-A-610 Class 2 and IPC-A-610 Class 3 for the production and assembly of PCB. We ensure that PCBA meets the ROHS standards, dedicated to promoting sustainable development that protects human health and the environment.

Rigid PCBA

Flexible PCBA

Rigid – Flex PCBA

Method of PCB Assembly

The choice of assembly method depends on the specific requirements of the project. KFEMS professional team is ready to guide you through the PCB assembly manufacturing process at any time, helping you select the most suitable method for your product.

THD/THT Assembly

THT stands for Through-Hole Technology. This technology involves inserting the pins of electronic components through the PCB board and soldering them to the other side of the PCB.

The advantages of THT:
Better mechanical strength, the pins of THT components pass through the PCB board and are soldered on the other side of the board, providing better mechanical support and connection strength.
Better heat resistance, since the solder joints are located on both sides of the PCB board, THT components typically have better heat resistance.
Easier maintenance, the pins of THT components are easy to observe and test, facilitating maintenance and replacement.

SMT Assembly

SMT stands for Surface Mount Technology. This technology involves directly mounting electronic components onto the surface of the PCB and connecting them to the PCB through surface soldering.

The advantages of SMT:
Higher component density,  SMT allows more components to be placed on the surface of the PCB, achieving higher component density.
Better electrical performance, the short pins and direct connection of SMT components can reduce the resistance and inductance of signal transmission, thereby improving circuit performance.
Better high-frequency characteristics, SMT technology is suitable for high-frequency circuit design because it can reduce the inductance and capacitance effects of the circuit, improving the high-frequency characteristics of the circuit.

SMT + THD Mixed Assembly

The advantages of SMT + THT mixed:
Combined advantages, integrating the strengths of SMT and THT, allow for achieving high-density component layouts while obtaining excellent mechanical strength and thermal performance.
Cost-effectiveness, allowing flexible selection between SMT and THT based on component types and production scales, to achieve optimized cost-effectiveness when needed.

KFEMS PCB Assembly Capabilities

KFEMS is a manufacturer integrating PCB manufacturing and assembly. Our factory has a complete ISO 9001 , ISO 13485 and IATF 16949 certification system. 

We have 200 skilled workers, 50 professional technicians, monthly production capacity:150,000 to 300,000 sets/month.

KFEMS has a 1000㎡ DIP electrostatic workshop. Equipped with a professional DIP post-welding team and advanced post-welding equipment. Equipped with 4 lead-free Lead-free Wave Soldering machines, with a daily production capacity of up to 100,000 pieces.
KFEMS has a 3000㎡ 100,000-level dust-free workshop, equipped with 7 fully automatic high-speed SMT assembly lines It also has online 3D SPI, online AOI, X-RAY machines, intelligent first-piece testers, fully automatic depaneling machines, selective conformal coating machines, and other equipment. The production yield of SMT reaches 99.9%.
3D-SPI Automatic solder paste testing machine

3D-SPI Automatic solder paste testing machine

G9+Automatic solder paste printing machine

G9+Automatic solder paste printing machine





Ten temperature-controlled zone nitrogen reflux furnace


Yamaha YSM10 chip mounter

Yamaha YSM10 chip mounter

Strict PCBA Test

Ultimate Quality Control with the Industry’s Strictest and Most Comprehensive 19-step Inspection Process.
KFEMS aims to serve customers with zero defects and worry-free delivery.

Our Repair And Return Policy

The first PCBA manufacturer in the industry to provide the ultimate in high-quality services.

Can be returned or exchanged

No physical objects, no photos, no reason to return or exchange, as long as you are satisfied.

If you want to have it repaired locally

We bear the cost of repairs

If you agree to return it for repair

We cover logistics and repair costs

If you do not agree to repair

We will replace you with a brand new product

If you do not agree to repair and replacement

We will refund you

Our Certificate

Customer Testimonials


Here are some questions our customers often ask, if there isn’t an answer you want to know, you can also send us an email.

·PCB: Quantity, Gerber file and Technic requirements

·PCBA: PCB information, BOM.

Your files are held in complete safety and security.We protect the intellectual property for our customers in the whole process.. All documents from customers are never shared with any third parties. 

There is no minimum order quantity in KFEMS.We are able to handle Small as well as large volume production with flexibility.

Normally 7-10 days for customize sample and 25-35 days for bulk order.

Our estimated delivery times start the day after you place your order, depending on the volume and complexity of your turnkey PCB assembly requirements.

Yes, we can ship to you no matter which country you are in.


Why us?

Zero Defects

Fast Services

Worry-Free Delivery

Contact Us

Get free DFMA report and quotation.

Step 1: Upload Production Files via The Form.

Our professional team will conduct DFMA analysis and product price calculation on your files.

Step 2: Get Free DFMA Report and Quotation.

We will send you the DFMA report within 3 hours and provide you with a quotation within 24 hours.

Step 3: Contract & Get Free Sample.

After signing the contract, we will provide samples for your confirmation free of charge

Step 4: Production.

If you notify us in advance about the components required for procurement, we can complete production within 7 days.

Step 5: Transportation.

We will ship the products to you through our efficient and secure logistics or through the logistics you request.

Get Free DFM Check and Sample

DFM inspection report available within 3 hours, PCBA quotation provided within 24 hours, sample fee refunded after placing an order.

Other Contact Information