Top 10 Dip Plug-in Welding Suppliers in Slovenia

Founded in 2005, Slovenian Electronics Solutions (SES) has grown from a small local workshop to one of Slovenia's leading providers of one-stop smt + dip assembly service . Based in Ljubljana's tech hub, SES prides itself on offering end-to-end solutions that seamlessly integrate dip plug-in welding with SMT assembly, component sourcing, and functional testing—eliminating the hassle of managing multiple vendors.

What sets SES apart is its investment in automated wave soldering equipment, which ensures consistent solder joint quality across high-volume runs. The company's 5,000-square-meter facility houses three wave soldering lines, each equipped with pre-heating zones and nitrogen atmosphere capabilities to minimize oxidation and defects. For low-volume or prototype projects, SES also offers manual dip welding stations staffed by certified technicians with decades of experience.

SES serves a diverse clientele, from automotive suppliers in Maribor to medical device startups in Zagreb. Its certifications include ISO 9001 (quality management) and ISO 14001 (environmental management), and it strictly adheres to RoHS 2.0 standards, making it a trusted partner for EU-based clients. "We once helped a client reduce their time-to-market by 40% by combining dip welding with in-house SMT and testing," notes Marko Kranjc, SES's sales director. "Our goal is to be more than a supplier—we're an extension of our clients' engineering teams."

Key Services: Dip plug-in welding (wave and manual), SMT assembly, component sourcing, functional testing, PCB design support. Industries served: Automotive, industrial automation, consumer electronics. USP: Fast turnaround (as little as 3 days for prototypes) and transparent pricing with no hidden fees.

Located in Koper, Slovenia's busiest port city, Adriatic Circuits specializes in dip plug-in and smt mixed assembly service , catering to clients across Europe and beyond. Since 2010, the company has carved a niche in high-precision assembly for industries where failure is not an option: medical devices, aerospace, and defense.

Adriatic Circuits' strength lies in its ability to handle complex mixed-technology PCBs, where SMT components (like ICs and sensors) coexist with through-hole parts (such as connectors and transformers). The company's wave soldering machines are equipped with advanced fluxing systems and temperature profiling tools to prevent thermal damage to sensitive SMT components during the dip welding process. For medical clients, Adriatic Circuits holds ISO 13485 certification, ensuring compliance with strict regulatory requirements for devices like patient monitors and diagnostic equipment.

"Our team includes engineers with backgrounds in both mechanical and electrical engineering, which helps us solve unique assembly challenges," explains Ana Horvat, Adriatic's quality manager. "Last year, we worked with a Croatian medical startup to assemble PCBs for a portable ultrasound device, where space constraints required precise placement of both SMT and through-hole parts. By optimizing the wave soldering parameters, we achieved a defect rate below 0.01%."

Key Services: Mixed SMT/dip assembly, high-reliability dip plug-in welding, conformal coating, sterile packaging for medical devices. Industries served: Medical, aerospace, defense. USP: ISO 13485 and AS9100 certifications, dedicated cleanroom assembly for sensitive applications.

Maribor-based Alpine Welding Tech has built its reputation on flexibility, serving clients from startups to Fortune 500 companies with dip soldering with functional testing as a core offering. Founded in 2012, the company focuses on bridging the gap between prototype development and mass production, making it ideal for businesses scaling from low-volume to high-volume runs.

Alpine's facility features two wave soldering lines—one optimized for small batches (50–500 PCBs) and another for mass production (10,000+ PCBs/month)—alongside a dedicated testing lab equipped with automated optical inspection (AOI) and in-circuit testing (ICT) tools. This allows the company to validate solder joint integrity and component functionality before shipping, reducing the risk of field failures. For clients without in-house component inventory, Alpine also offers component sourcing services, leveraging partnerships with global distributors to secure hard-to-find parts at competitive prices.

"We understand that startups need agility, while larger companies need consistency," says Luka Novak, Alpine's operations director. "A Slovenian robotics firm recently approached us with a prototype PCB for a warehouse automation system. We assembled 10 units using manual dip welding, then scaled up to 500 units/month with our automated line—all while maintaining the same quality standards. Their engineering team was impressed by how quickly we adapted."

Key Services: Low-to-high volume dip plug-in welding, functional testing, component kitting, prototype assembly. Industries served: Industrial automation, robotics, consumer electronics. USP: Scalable production capabilities, rapid prototyping turnaround (24–48 hours for small batches).

As an ISO certified dip welding factory with over 15 years of experience, Ljubljana Manufacturing Services (LMS) is a go-to partner for clients prioritizing quality control and regulatory compliance. Located just outside Ljubljana's city center, LMS specializes in rohs compliant dip soldering service , ensuring that all materials and processes meet EU restrictions on hazardous substances like lead and mercury.

LMS's quality management system is rigorous: every batch of PCBs undergoes AOI inspection post-soldering, and critical projects include X-ray inspection to verify hidden solder joints (e.g., in BGA components paired with through-hole parts). The company also invests in staff training, with all technicians certified by the IPC (Association Connecting Electronics Industries) to IPC-A-610 standards for acceptability of electronic assemblies.

"Compliance isn't just about paperwork—it's about building trust," says Petra Zupan, LMS's compliance officer. "We recently worked with a German automotive supplier to assemble PCBs for electric vehicle charging stations. Their audit team was particularly impressed by our traceability system, which tracks every component from receipt to shipping, including batch codes and RoHS certificates. This level of transparency is non-negotiable in the automotive sector."

Key Services: RoHS-compliant dip plug-in welding, AOI/X-ray inspection, PCB repair, and rework. Industries served: Automotive, renewable energy, consumer electronics. USP: IPC-A-610 certification, full material traceability, and dedicated compliance team.

Nestled near the scenic Lake Bled, Julian Alps Electronics (JAE) offers a unique blend of natural beauty and cutting-edge manufacturing. Founded in 2008, JAE has positioned itself as a global through-hole welding service provider , with clients in over 20 countries, including the U.S., Germany, and Japan. The company's strength lies in its ability to combine dip plug-in welding with SMT assembly, testing, and logistics—offering true turnkey solutions.

JAE's 8,000-square-meter facility includes a dedicated export department that handles customs documentation, shipping, and even on-site installation support for international clients. For large-scale projects, the company offers vendor-managed inventory (VMI) programs, where it stores components on behalf of clients and assembles PCBs on-demand to reduce lead times. JAE's wave soldering lines are compatible with lead-free and tin-lead solders, giving clients flexibility based on their application requirements.

"We recently completed a project for a Japanese industrial client that required 50,000 PCBs for factory automation controllers," says Matej Kos, JAE's export manager. "By leveraging our VMI program, we were able to reduce their inventory holding costs by 30% while maintaining a 99.8% on-time delivery rate. Our bilingual team (English, German, Japanese) also helped streamline communication, which is crucial for global partnerships."

Key Services: Turnkey dip/SMT assembly, global logistics, VMI, and after-sales support. Industries served: Industrial automation, telecommunications, marine electronics. USP: Multilingual support, global shipping expertise, and cost-effective high-volume production.

Based in the coastal town of Piran, near the Italian border, Coastal Assembly Solutions (CAS) has earned a reputation for high precision dip soldering for pcbs in niche industries like aerospace and defense. Since 2010, CAS has focused on serving clients with demanding requirements for solder joint strength, thermal cycling resistance, and long-term reliability—often in harsh environments.

CAS's wave soldering process is fine-tuned for aerospace-grade PCBs, which often feature thick copper layers and heat-resistant substrates. The company uses nitrogen-enriched wave soldering to minimize oxidation, ensuring solder joints with excellent wetting and reduced porosity. For defense clients, CAS holds ITAR registration, allowing it to work on projects involving classified technology. The company also offers conformal coating services, applying protective layers (such as acrylic or silicone) to PCBs to shield against moisture, dust, and chemical exposure.

"Aerospace components must withstand extreme conditions—from -55°C to 125°C—and thousands of thermal cycles," explains Nika Pavlič, CAS's engineering lead. "Last year, we partnered with a Slovenian defense contractor to assemble PCBs for a radar system. Our soldering process was validated through 1,000 thermal cycle tests, and the boards passed with zero failures. That level of rigor is why clients trust us with their most critical projects."

Key Services: High-precision dip plug-in welding, ITAR-compliant assembly, conformal coating, environmental testing. Industries served: Aerospace, defense, oil and gas. USP: ITAR registration, aerospace-grade quality, and extreme environment testing.

For businesses prioritizing cost without sacrificing quality, Central Slovenia Manufacturing (CSM) in Celje is a top choice. Founded in 2015, CSM specializes in low cost dip soldering processing by optimizing workflow efficiency and leveraging economies of scale. The company's lean manufacturing approach—combined with strategic partnerships with local component suppliers—allows it to offer competitive pricing for high-volume orders, particularly in consumer electronics and home appliances.

CSM's facility is designed for mass production, with automated component insertion machines feeding into high-speed wave soldering lines capable of processing up to 500 PCBs per hour. The company also invests in energy-efficient equipment, reducing operational costs that are passed on to clients. Despite its focus on affordability, CSM maintains ISO 9001 certification and conducts 100% AOI inspection on all PCBs to ensure defect rates stay below 0.1%.

"We work with several Slovenian and Croatian appliance brands to assemble control boards for refrigerators, washing machines, and air conditioners," says Goran Mlakar, CSM's production manager. "By running our wave soldering lines in three shifts and negotiating bulk component prices, we've helped these clients reduce their per-unit assembly costs by 15–20% compared to their previous suppliers. Quality remains our top priority, though—we've never had a recall due to soldering defects."

Key Services: High-volume dip plug-in welding, SMT assembly, AOI inspection, and packaging. Industries served: Consumer electronics, home appliances, lighting. USP: Cost-effective mass production, lean manufacturing, and high throughput.

Karst Electronics, located in Postojna (famous for its limestone caves), has carved out a niche as an exporter of dip plug-in assembly to markets across Europe, the Middle East, and Africa. Founded in 2008, the company focuses on flexibility, offering everything from manual prototype assembly to automated mass production, with a particular expertise in dip plug-in and smt mixed assembly service for clients with diverse PCB designs.

Karst's team prides itself on quick response times, with quote requests typically answered within 24 hours and prototype orders shipped within 3–5 days. The company's facility includes a dedicated prototyping lab with manual soldering stations and a small-batch wave soldering machine, allowing engineers to test designs and make adjustments before scaling to mass production. For clients in regulated industries, Karst holds ISO 9001 and RoHS certifications, with additional compliance options (such as REACH) available upon request.

"We recently helped a startup in Serbia develop a smart home controller," says Tadej Jereb, Karst's founder. "They came to us with a rough PCB design and a tight deadline to demo at a trade show. Our engineers worked with them to optimize the layout for dip and SMT assembly, then built 20 prototypes in 48 hours. The demo was a success, and they've since scaled to 5,000 units/month with our automated lines."

Key Services: Prototyping, mixed SMT/dip assembly, small-to-medium volume production, export logistics. Industries served: IoT, smart home, industrial sensors. USP: Fast prototyping, flexible production volumes, and multilingual customer support.

Nestled in the scenic Soča Valley, Soča Valley Tech (SVT) caters to clients needing low volume dip plug-in assembly and prototype development. Founded in 2014 by a team of ex-aerospace engineers, SVT specializes in serving startups, research institutions, and small-to-medium enterprises (SMEs) with custom projects that require personalized attention and technical flexibility.

SVT's facility is intentionally scaled for low-volume work, with a focus on manual and semi-automated processes that allow for quick changes between projects. The company offers component sourcing for hard-to-find or obsolete parts, leveraging a global network of distributors and brokers to help clients keep legacy products alive. For academic clients, SVT provides discounted rates for research projects, supporting innovation in fields like renewable energy and robotics.

"We recently partnered with the University of Ljubljana to assemble PCBs for a solar-powered drone prototype," says Aljaž Peternelj, SVT's technical director. "The design required custom-shaped through-hole components that no standard supplier carried. We sourced the parts from a specialty manufacturer in Germany, then hand-soldered them to the PCBs to ensure precise alignment. The drone successfully completed its first test flight last month, and we're now scaling up for a small production run."

Key Services: Low-volume dip plug-in welding, prototype assembly, custom component sourcing, R&D support. Industries served: Academia, startups, renewable energy, robotics. USP: Specialized in custom and low-volume projects, research collaboration.

Rounding out our list, Triglav Manufacturing Group (TMG) in Kranj offers a comprehensive suite of services that go beyond dip plug-in welding to include finished product assembly , making it a true one-stop shop for electronics manufacturing. Founded in 2003, TMG serves clients across Europe with end-to-end solutions: from PCB design and component sourcing to dip/SMT assembly, enclosure integration, and final packaging.

TMG's 12,000-square-meter facility includes dedicated lines for PCB assembly, mechanical assembly (e.g., inserting PCBs into enclosures), and testing (including environmental and EMC testing). For clients with complex supply chains, TMG offers turnkey smt pcb assembly service with global component sourcing, ensuring parts are procured at the best price and delivered on time. The company's certifications include ISO 9001, ISO 14001, and RoHS, with a focus on sustainable manufacturing practices—such as waste reduction and energy efficiency.

"A Austrian client came to us needing a complete industrial sensor system—PCBs, enclosures, wiring, and packaging," explains Mojca Kovačič, TMG's project manager. "We handled everything: sourced the PCBs, assembled the electronics with dip and SMT components, integrated them into rugged enclosures, and even designed the packaging. By consolidating their supply chain with us, they reduced lead times by 50% and cut costs by 15%."

Key Services: Turnkey manufacturing, dip/SMT assembly, finished product assembly, testing, logistics. Industries served: Industrial sensors, smart meters, medical devices. USP: End-to-end manufacturing, sustainability focus, and large-scale production capabilities.