Products
- Individual winding technology for customized inductors
- Wide power range from 0.5 VA to over 50 kVA and from µH to mH at up to 500 A
- Standard-compliant production in accordance with EN 61558, IEC 60076, EN 60601, UL 5085
Over 60 years of experience
in the electrical engineering and electronics industry
Short delivery times
through optimized warehousing
Germany and Switzerland
Dual location strength and reliability
Our range of customized inductors
Transformers
Our transformers cover a broad spectrum from control transformers with outputs from 50 to 500 VA, through safety transformers in the 10 VA to 2 kVA range, to mains transformers with 500 VA to over 50 kVA. The designs range from toroidal to printed circuit board transformers.
These components are used in machine control systems, medical technology, laboratory and testing applications as well as in industrial power supplies. They offer galvanic isolation, overvoltage protection and EMC-optimized behaviour. Our production is based on EN 61558, UL 5085, IEC 60076 and EN 60601, so that international approvals and maximum safety are guaranteed.
These components are used in machine control systems, medical technology, laboratory and testing applications as well as in industrial power supplies. They offer galvanic isolation, overvoltage protection and EMC-optimized behaviour. Our production is based on EN 61558, UL 5085, IEC 60076 and EN 60601, so that international approvals and maximum safety are guaranteed.
Control transformers
Ideal for automation - reliable power supply for control components
| Performance | 50–500 VA |
| Function | Supply of control logic & relays |
| Use | Machine control, field devices |
| Specifications | Primary 120/240 V, Inrush-VAs, UL/VDE |
Safety transformers
For maximum safety - certified protective transformers for device and personnel insulation
| Performance | 10 VA–2 kVA |
| Function | Galvanic isolation for device safety |
| Use | MedTech, laboratories, IT protection |
| Specifications | EN 61558, UL 5085, insulation test up to 6 kV |
Isolating transformers
Cleanroom & test-compatible - highly insulated industrial transformers
| Performance | 100 VA–10 kVA |
| Function | Protection against overvoltage |
| Use | Clean rooms, test benches |
| Specifications | Insulation ≥4 kV, high-quality winding |
Autotransformers
Efficient voltage adjustment - compact & precise for industry
| Performance | 100 VA–5 kVA |
| Function | Divide voltage without insulation |
| Use | Machines, railroad technology |
| Specifications | Accuracy <1 %, EMC-optimized |
Mains transformers
Power supply - robust mains transformers for buildings & systems
| Performance | 500 VA–50 kVA+ |
| Function | System mains supply |
| Use | Industry, buildings |
| Specifications | IEC 60076, thermal / hum tests |
Toroidal transformers
Efficient & quiet - space-saving toroidal transformers for EMC-sensitive systems
| Performance | 50 VA–5 kVA |
| Function | Compact & EMC-optimized |
| Use | SMPS, audio, EMC-critical areas |
| Specifications | Low wastage, quiet |
Printed circuit board transformers
PCB assembly made easy - insulated PCB transformers
| Performance | 0,5–50 VA |
| Function | PCB assembly with insulation |
| Use | Embedded, sensors, audio |
| Specifications | UL/VDE-compliant, thermal |
Medical transformers
Medical protection standard - EN 60601-compliant and reliable
| Performance | 5 VA–2 kVA |
| Function | Protection between network & patient |
| Use | OP, diagnostic devices |
| Specifications | EN 60601, ≥4 kV insulation test |
Throttles
Rotima chokes and coils are specially developed for power and signal conditioning. Suppression chokes with inductances from 10 µH to 10 mH and currents up to 50 A ensure effective suppression of high-frequency interference in power supply units and drives. Storage chokes for DC/DC converters operate in ranges from 50 µH to 5 mH at currents up to 500 A and support reliable smoothing and energy storage.
By using heat-optimized windings, EMC-compliant designs and materials with high current carrying capacity, we ensure a high level of operational reliability. Typical applications include energy storage systems, photovoltaic systems and industrial power electronics.
By using heat-optimized windings, EMC-compliant designs and materials with high current carrying capacity, we ensure a high level of operational reliability. Typical applications include energy storage systems, photovoltaic systems and industrial power electronics.
Suppressor chokes
EMI-capable filters - effective HF protection in networks
| Inductance/current | 10 µH–10 mH; ≤50 A |
| Function | Filter HF interference |
| Applications | Power supply units, drives |
| Challenges | ≥60 dB EMV, UL 94 V-0 |
Storage chokes
Storage chokes for power electronics - efficient current limiting and energy storage at high loads.
| Inductance/current | 50 µH–5 mH; ≤500 A |
| Function | DC/DC smoothing |
| Applications | Energy storage, PV |
| Challenges | Heat mgmt, Inrush design |
Mains/motor chokes
Mains rectification - EMC-certified chokes for motor control
| Inductance/current | 1–100 mH |
| Function | Harmonic reduction |
| Applications | Inverter applications |
| Challenges | Temp class F/H, EN 61558, UL 5085 |
Baking lacquer/air coils
Flexible HF filters - space-saving air coils for demanding frequencies
| Function | Contactless current measurement |
| Applications | Power monitoring, transient meas. |
| Challenges | Linearity, up to 1 MHz - Appleton, Elliott, Rockwell, Schneider, Rocoil |
Rogowski coils
Precise current sensors - contactless, up to 30 kA, ideal for AC current measurement Switch monitoring
| Function | µH–10 mH |
| Inductance/current | HF filter |
| Applications | HF circuits, automation |
| Challenges | ≥5 kHz, compact |
Transformer
For applications in high-frequency technology, we supply transformers and HF components that are specially designed for compact construction, low losses and frequency-optimized behaviour. Whether as signal transformers, planar transformers or RF chokes - our solutions cover the range from the smallest PCB units to complex assemblies for high-frequency modules.
They are used in embedded systems, sensor technology, communication technology and audio electronics, among others. By using UL-compliant materials, optimized winding techniques and stringent EMC tests, we guarantee high signal quality and reliable function in frequency-critical applications.
They are used in embedded systems, sensor technology, communication technology and audio electronics, among others. By using UL-compliant materials, optimized winding techniques and stringent EMC tests, we guarantee high signal quality and reliable function in frequency-critical applications.
HF/signal/SMPS transformer
HF transformer - compact, efficient isolation for switching & audio applications
| Performance | 1–100 VA |
| Function | HF power & insulation |
| Applications | SMPS, audio, control technology, DC/DC, resonant converters |
| Specifications | 20 kHz-MHz, low leakage inductance |
Ferrite/toroid designs
Ferrite toroidal transformers - compact, low-loss and EMC-optimized for high-frequency applications.
| Performance | 1 VA–10 kVA |
| Function | HF isolation/interference suppression |
| Applications | Radio, EMC filter, DC/DC, resonant converters |
| Specifications | UL 1446, low leakage inductance |
Toroidal HF transformer
Toroidal RF transformer - precise RF isolation for telecommunications and RF technology
| Performance | like HF transformers |
| Function | HF isolation & matching |
| Applications | Telekom, RF |
| Specifications | Compact, precise insulation |
EMC components
Electromagnetic compatibility is a central component of modern electronics. Our EMC components offer filter properties of over 60 dB and are tested in accordance with UL 94 V-0. This ensures effective suppression of interference in power supply units, drive systems and sensitive control systems.
The construction is designed for safe thermal management, minimal inrush currents and durable insulation. This makes our EMC solutions particularly suitable for automated production systems, power supply systems and medical devices where trouble-free operation is a top priority.
The construction is designed for safe thermal management, minimal inrush currents and durable insulation. This makes our EMC solutions particularly suitable for automated production systems, power supply systems and medical devices where trouble-free operation is a top priority.
Common mode choke
Effective common mode filters - strong interference suppression for mains/signal lines
| Current/Power | several 100A possible |
| Function | Suppression of common mode interference |
| Applications | Converters, industry, automation, IT |
| Requirements | ≥60 dB, EN 61000‑6x, RoHS |
Suppressor chokes
Reliable surge protection - suppressor coils for safe grid systems
| Current/Power | 0,1–50 A |
| Function | Overvoltage protection |
| Requirements | UL 94 V-0, high transient resistance |
Customized inductors for precise industrial applications
We manufacture customer-specific inductors that are precisely tailored to technical requirements. As an industrial company with many years of experience, we develop transformers, chokes and coils that are precisely adapted to your projects in terms of performance, size and electrical safety.
Our products meet the highest standards in terms of energy efficiency, electromagnetic compatibility and thermal stability. By working closely with developers and purchasers, we ensure that each solution can be optimally integrated into existing systems. We take into account standards such as EN and IEC as well as specific test requirements for international markets.
With our expertise in winding technology and material selection, we produce inductors for a wide range of applications in automation, medical technology, energy supply and testing technology. In this way, we support companies in developing reliable and durable electronic systems and using them successfully on the market.
Our products meet the highest standards in terms of energy efficiency, electromagnetic compatibility and thermal stability. By working closely with developers and purchasers, we ensure that each solution can be optimally integrated into existing systems. We take into account standards such as EN and IEC as well as specific test requirements for international markets.
With our expertise in winding technology and material selection, we produce inductors for a wide range of applications in automation, medical technology, energy supply and testing technology. In this way, we support companies in developing reliable and durable electronic systems and using them successfully on the market.
Customized winding technology
Flexible designs: Toroidal core, printed circuit boards, planar and more
More information on customized inductors:
Do you have questions about customized inductors?
Tailor-made inductors with tested quality and conformity to standards
Our customized inductors combine voltage adjustment, filtering and energy storage with clearly defined safety and efficiency requirements. We attach great importance to ensuring that all products not only meet the electrical characteristics, but also pass international standards and tests. These include insulation tests up to 6 kV, EMC tests with interference suppression above 60 dB and thermal stress tests.
We support purchasers with traceability and complete specification documents, while engineers benefit from simple integration into complex systems. Whether in medical technology, energy supply or industrial automation, our solutions are versatile. The variety of designs - from toroidal core and PCB variants to multilayer windings - allows precise adaptation to the respective application.
By using materials tested in accordance with UL 94 V-0, EN 60601 or IEC 60076, we achieve consistently high quality and international approvals. This ensures that every customer-specific inductor is a reliable and durable element of your technology.
We support purchasers with traceability and complete specification documents, while engineers benefit from simple integration into complex systems. Whether in medical technology, energy supply or industrial automation, our solutions are versatile. The variety of designs - from toroidal core and PCB variants to multilayer windings - allows precise adaptation to the respective application.
By using materials tested in accordance with UL 94 V-0, EN 60601 or IEC 60076, we achieve consistently high quality and international approvals. This ensures that every customer-specific inductor is a reliable and durable element of your technology.
Do you have any questions about our range of other customized winding products?
Customized winding technology for efficiency and EMC-compliant design
In our developments, we focus on maximum energy efficiency and a consistently EMC-compliant design. Whether it's suppressing high-frequency interference in drives, smoothing in DC/DC converters or galvanic isolation in control circuits - our solutions are always adapted to the specific project.
We manufacture inductors with values ranging from a few microhenries to several millihenries and currents of up to 500 amperes. Transformers from our production cover voltage ranges from 10 VA to over 50 kVA. For engineers, this means the availability of solutions with low leakage losses, optimized heat dissipation and robust insulation. Buyers can rely on calculable costs, predictable delivery times and individual advice.
Thanks to modern winding technology, the use of high-quality materials and stringent quality tests, we create inductors that are durable and reliable. At the same time, we ensure compliance with international standards and EMC directives so that you can implement systems with maximum efficiency and operational reliability.
We manufacture inductors with values ranging from a few microhenries to several millihenries and currents of up to 500 amperes. Transformers from our production cover voltage ranges from 10 VA to over 50 kVA. For engineers, this means the availability of solutions with low leakage losses, optimized heat dissipation and robust insulation. Buyers can rely on calculable costs, predictable delivery times and individual advice.
Thanks to modern winding technology, the use of high-quality materials and stringent quality tests, we create inductors that are durable and reliable. At the same time, we ensure compliance with international standards and EMC directives so that you can implement systems with maximum efficiency and operational reliability.
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What can we do for you?
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Further information on our customized inductors products
In our FAQ section, we answer the most frequently asked questions about customer-specific inductors. As a manufacturer of transformers, chokes, coils and transformers, we know that technical details and clear information are crucial for engineers and purchasers alike. We give you an overview of power ranges, standards, areas of application and manufacturing processes. We also explain how we develop tailor-made solutions using precise winding technology, tested insulation and EMC-optimized designs.
