Prototyping

Manufacturing of single PCBs with the use of a engraving machine. 

SMT line with high-speed paste dispensers. 

3D printing with a wide range materials. Rework station BGA 

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SMT&THT assembling

11 lines (JUKI, Yamaha, Hanwa) - 1 585 400CPH. 

Component size - 0201metric~50x150mm, H 28mm. Max  PCB size - 570x490. Reflow ovens - 11 zones, in air or N2. 

QC - SPI+AOI 100% control in lines, QR traceability, IPC-A-610

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Metal processing & powder coating

Radial component inserters. Semi-automatic and manual soldering. 

Wave soldering in nitrogen environment. IPC-A-610  

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Final assembly

Six manufacturing workshops for mass production, staffed by experienced professionals, handle final assembly, testing and packaging with precision and care. 

IPC-A-610  

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Prototyping & pilot production

 
 

SMT & Electronics Prototyping

Solder Paste & Material Dispensing

  • Precise solder paste and adhesive dispensing for prototypes and small batches
  • Fast setup without stencil production
  • Reliable results for fine-pitch SMD components

SMT Pick & Place Assembly

  • Fast and accurate placement of SMD components
  • Flexible assembly without waiting for high-volume production lines
  • Smooth transition from prototype to pilot series

Reflow Soldering

  • Controlled and repeatable soldering profiles
  • Industrial-grade soldering quality for prototypes
  • Lead-free and mixed technology processes


Rework, Repair & Engineering Changes

BGA & Fine-Pitch Rework

  • Safe removal and replacement of BGA, QFN and complex ICs
  • Design fixes without PCB redesign
  • Extension of prototype lifecycle

Precision Manual Soldering

  • High-accuracy manual assembly and rework
  • Modification of sensitive and fine-pitch components
  • Fast engineering support during development

Mechanical & Enclosure Prototyping

CNC Machining

  • Rapid manufacturing of mechanical parts and enclosures
  • Design iterations without external suppliers
  • High-precision parts for functional testing

3D Printing

  • Fast production of functional plastic parts

  • Early validation of mechanical design

  • Reduced time and cost before tooling 

High-volume, high-precision SMT & THT assembly in Europe   ​

At 4S4 Production, we operate 11 SMT lines with a total capacity of 1.58 million CPH, ensuring fast, reliable, and cost-efficient PCB assembly for projects of any scale.  With speed, scale, and certified quality, our SMT workshops are the ideal partner for companies in Europe & seeking to localize or expand electronics production in Europe

High-Speed Precision – JUKI, YAMAHA, and Hanwa (SAMSUNG) placement machines with advanced reflow ovens deliver consistent quality at industrial volumes.

Comprehensive Process Control – Automated solder paste inspection, AOI, and barcode verification guarantee 100% accuracy and traceability.

Flexibility for Every Project – From prototypes and small batches to high-volume production, we adapt capacity and technology to your needs.

Advanced Coating & Protection – Automated conformal coating lines provide long-term reliability under demanding conditions.

Integrated THT & Final Assembly – SMT workshops are seamlessly connected with THT soldering, functional testing, and final assembly, offering full-cycle production under one roof.

Certified Quality – All processes comply with IPC-A-610 and ISO standards (9001, 14001, 27001, 45001, 50001)

Metal processing & powder coating  

Laser cutting and engraving of acrylic

  • Achieve exceptional cutting precision—up to 0.1 mm accuracy—with no heat-induced deformation

  • Process large acrylic sheets (up to 1400×2300 mm) with ease

  • Intricate engraving for stunning designs & light-conducting surfaces

  • Fast, high-quality cutting of any material amount & contour complexity

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Production of colored cardboard packaging

Technical information for customers