FAQ - Frequently asked questions about coil manufacturing, PCB assembly and assembled electronic components

On this page you will find answers to the most important questions about our worldwide service in coil manufacturing and PCB assembly. For specific concerns, we are always happy to receive your enquiry via the web contact form.

 

  • For which application areas does KUK manufacture coils and electronics?

KUK Group has been an established supplier to automotive, medical technology and industrial customers for many years. KUK manufactures high-precision coils and complete solenoid valve units for automotive suppliers. In the medical and sensor systems field, KUK is a technology partner for miniaturised coils and electronics. KUK supplies the industrial sector with tailor-made coils and complete assemblies for a wide range of customer segments. The range extends from coils in drive technology to electronic components for building automation.

  • Does KUK offer a standard range of coils?

No, at KUK Electronic AG every coil is custom-made. We are able to manufacture air core coils (baked varnish coils or self-supported coils), windings on bobbins, windings on magnetic cores, toroidal coils, transformers and chokes in small and large series - regardless of shapes and dimensions. We also take care of the varnishing, sealing and insert molding of your coil.

  • Which coils does KUK wind?

As one of the world's leading coil manufacturers, we can offer you a wide range of coils: KUK Electronic AG winds air core coils (baked varnish coils or self-supported coils), toroidal core coils, transformers and chokes. Windings on bobbins and windings on magnetic cores are also part of our speciality - all in small as well as large runs. For us, every coil is unique, for which we work with you to find the best technical and commercial solution. We are also happy to support you in the development phase.

  • What service does KUK offer in the assembly of printed circuit boards (PCB)?

KUK Electronic AG is your flexible supplier and full-service partner for both SMD (surface mount device) and conventionell THT (through-hole technology) PCB assembly. We take care of all work steps for you, from procurement to PCB assembly and quality control.

  • Can I order assembled units from KUK?

Yes, thanks to our assembly service, with KUK Electronic AG you have a supplier who can provide you with assembled electronic components from a single source, for example coils, electronics and insert molding.

  • I only need a small quantity of coils or assembled PCBs. Is it still worthwhile to enquire with KUK?

Absolutely! As one of the world's leading manufacturers of coils and electronics, customised products, from small to large series, are our speciality. You can contact us easily via our web contact form.

  • My demand exceeds several million coils per year. Does KUK have this capacity?

Absolutely! As one of the world's leading manufacturers of coils and electronics, customised products, from small to large series, are our speciality. If a continuous decrease is contractually agreed with the customer, KUK establishes a flow production. Such a material flow can be defined and operated across several locations (global sourcing).

  • KUK is a proven specialist for miniature coils/micro coils manufacturing. What minimum dimensions do you offer?

KUK Group has extensive experience in winding miniature coils/micro coils with an ultra-fine wire of 0.010 mm diameter (pure copper); together with the insulating layer, the effective outer diameter is 0.0133 mm. With windings directly on magnetic cores, minimum diameters of the miniature coils/micro coils from 0.3 mm are thus possible, as they are used in the medical and sensor systems field, among others. 

  • On which core material does KUK wind micro coils?

KUK Group is able to produce miniature coils with different core materials, for example amorphous core material, ferrite or mu-metal. The minimum diameter is 0.1 mm. Which core material is optimal for the production of your micro coil must be assessed on a case-by-case basis.

  • Which performance or magnetic fields can be achieved with micro coils from KUK?

As a purely customer-specific coil manufacturer, KUK Group leaves the design of the coil to the customer, who can best determine the requirements of his product. We are happy to support you in the development and manufacturing process so that the required dimensions can also be realised. Please note that the cut quality of the core material has a higher impact on the magnetic field than the windings.

  • How does KUK contact micro coils with the surrounding components?

The contacting process with the other components is a great challenge due to the dimensions. Over the years, KUK Group has developed an innovative soldering technology whose stable manual process enables clean and commercially attractive processing. Of course, KUK always strives to automate as many technological steps as possible. Thanks to in-house plant construction, there is proven experience for tailor-made automation solutions.

  • How does KUK achieve sufficient stability in miniature coils?

As one of the world's leading manufacturers of coils and electronics, KUK Group has extensive experience with potting in various medical tubing. This process has proven itself in coil production with miniature coils from 0.3 mm (outer diameter). 

  • What kind of measurements can KUK perform in the production of micro coils?

As part of coil production, KUK Group measures ohmic resistance and inductance serially of miniature coils. Further measurements can be assessed according to customer requirements.

  • What kind of manufacturing lines does KUK use for coil and electronics production?

At KUK Group, customer-specific coils and electronic assemblies are largely produced on automated plants developed in-house. This means that we can offer you a very attractive coil production process in terms of quality and commerce, tailored to your volume and technical specifications.

  • Can I make an enquiry online?

We are always happy to receive your enquiry via the web contact form and will get back to you within 24 hours (weekdays). Ideally, you should also submit any existing drawings with the form so that we can quickly respond to your request in a very concrete manner.

  • In what time frame can KUK deliver a sample?

Samples for coils, printed circuit boards and complete assemblies can be produced within a very short time. Simple tools are created to achieve this, allowing significant findings to be gathered for the series production process even at this stage. Enquire simply via the web contact form.

  • How long do you need for a quotation?

A high-quality service according to Swiss standards naturally includes a quick quotation. Once all the specifications have been clarified, you will receive a quotation from us within five to ten working days. Simply send us an enquiry using the web contact form.

  • At which locations does KUK manufacture?

As one of the world's leading manufacturers of coils and electronics, KUK Electronic AG manufactures in Europe and Asia, close to the customer. We operate plants in Switzerland, China, Slovakia, France, the Netherlands and Thailand. Quality standards are harmonised worldwide and are controlled and monitored according to the same processes.

  • Is it possible for KUK to manufacture the same product redundantly at different locations?

Depending on requirements and volume, we can also produce your order at several locations simultaneously (global sourcing). The quality standards are harmonised worldwide and are controlled and monitored according to the same processes.

  • Swiss suppliers are too expensive due to the cost pressure in our industry. What alternative does KUK offer?

As one of the world's leading manufacturers of coils and electronics, KUK Electronic AG manufactures in Europe and Asia close to the customer and offers quality at an excellent price-performance ratio. Thanks to several production sites in the EU area and in Asia, we can provide you with a tailor-made offer - simply enquire via the web contact form.

  • As a manufacturer in the EU area, Swiss suppliers are more costly for us in terms of customs. What alternative does KUK offer?

With plants in Slovakia, the Netherlands and France, KUK Electronic has three locations in the EU area. As a customer from another EU country, you will not incur any administrative or financial disadvantages when supplying from one of these plants. We are happy to work with you to determine the optimum production location for you - simply enquire via the web contact form.

  • Can you give me information on quality assurance at KUK?

In all our EMS services, the highest product quality forms the basis of our success - at Swiss level across all locations. All employees can access the specially developed production data management software (PDM) via tablet PC. It is possible to define test characteristics for any work step during production. In this way, productivity and quality become measurable in every step of the value chain. You can find more information in the Quality menu.

  • What documentation does KUK create during the manufacturing process?

As one of the world's leading manufacturers of coils and electronics, KUK Group stands for the highest quality standards. Requirements such as material traceability, achieved measured values or CPK values are stored in the production data management software (PDM) developed in-house and can be shared with customers. Customer-specific measurements can also be automatically documented in the PDM, depending on requirements.

  • Which certifications does KUK have?

The main certifications distinguish KUK as a reliable partner for the automotive, industrial and medicine & sensor sectors. All locations are ISO 9001 certified. The headquarters in Appenzell (Switzerland) is also ISO 14001 and IATF16949 certified. An overview of the certifications of all worldwide locations can be found here.


We wind coils and assemble PCB based on your individual specifications.

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