Material Options
Glass-fibre reinforced PET SKYT.5220FR and PA66 A RV250 natural depending on variant and application
Economic Transformer Design
ETD / EER
High-Frequency Power Transformers
Coil formers and system components for switch-mode power supplies, converters and high-frequency transformer applications.
Product Family
Family Overview.
ETD / EER is part of NORWE's product system for demanding electrical and electronic applications. The family combines proven core geometry compatibility with reliable manufacturing, material expertise and application-specific configuration options.
Switch-Mode Power SuppliesConvertersHigh-Frequency TransformersPower ElectronicsBattery Chargers
Family Technical Data
Technical Foundation.
The product family is defined by material options, thermal behavior, insulation requirements and manufacturing features that support reliable long-term performance.
RTI Performance
PET SKYT.5220FR with RTI +155°C and PA66 A RV250 natural with RTI +100°C depending on variant
Soldering Resistance
Maximum soldering temperature up to +350°C for short-term exposure up to 2 seconds
Pin & Blade Materials
Tin bronze, tin-plated solder pins and brass, tin-plated solder blades depending on configuration
Design System
ETD Standard with solder pins, ETD Standard with solder blades, ETD lr low-height versions and EER variants
Special Materials
Radiation cross-linked materials and special executions are available on request
Product Groups
Select A Product Group.
Choose a product group to access verified NORWE types, order codes, technical product visuals and article-specific request actions.
01
ETD Coil Formers Horizontal
Horizontal ETD Coil Formers
Horizontal ETD coil formers for switch-mode power supplies, converters and high-frequency transformer applications.
Series: ETD HorizontalOrientation: HorizontalMaterials: PET SKYT.5220FR
02
ETD Coil Formers Vertical
Vertical ETD Coil Formers
Vertical ETD coil formers for upright transformer assemblies and SMPS applications.
Series: ETD VerticalOrientation: VerticalMaterials: PET SKYT.5220FR
03
ETD Protection Class Coil Formers / Concentric Design
Protection Class Coil Formers
ETD protection class coil formers in concentric design for transformers with separated primary and secondary windings.
Series: ETD Protection ClassDesign: Concentric designMaterials: PA66 A RV250 natural
04
EER Coil Formers Horizontal
Horizontal EER Coil Formers
Horizontal EER coil formers in modern design with solder pins for high-frequency transformer applications.
Series: EER HorizontalOrientation: HorizontalMaterials: PET SKYT.5220FR
05
EER Coil Formers Vertical
Vertical EER Coil Formers
Vertical EER coil formers in modern design with solder pins for upright transformer applications.
Series: EER VerticalOrientation: VerticalMaterials: PET SKYT.5220FR
06
ETD Potting Boxes Horizontal
Accessory / Housing
Horizontal ETD potting boxes for protected and encapsulated ETD transformer assemblies.
Function: Potting and protectionApplication: ETD horizontal coil former assembliesMaterials: PA66 A RV250 natural
07
ETD lr Potting Boxes Horizontal
Accessory / Housing
Reduced-height ETD lr potting boxes for ETD lr versions with minimized weight and shorter overall height.
Function: Low-height potting and protectionApplication: ETD lr horizontal coil former assembliesMaterials: PA66 A RV250 natural
08
ETD Potting Boxes Vertical
Accessory / Housing
Vertical ETD potting boxes for encapsulated ETD vertical coil former assemblies.
Function: Potting and protectionApplication: ETD vertical coil former assembliesMaterials: PA66 A RV250 natural
09
Protection Class With Distance Ring DR
Distance Ring / Protection Class Component
Distance rings DR for protection class transformer concepts and improved creepage and clearance distances.
Function: Distance ring for insulation conceptsApplication: Protection class transformers with round winding cross-sectionMaterials: PA66 A RV250 natural or PET SKYT.5220FR
10
Spring Clips FK-ETD
Assembly Component
FK-ETD spring clips for connecting ETD core halves in horizontal and vertical designs.
Function: Connection and fixation of ETD core halvesApplication: Horizontal and vertical ETD assembliesMaterial: Stainless steel
Advantages
Product Advantages.
Designed for SMPS transformer applications
Horizontal and vertical versions available
ETD lr low-height design available
EER variants for modern transformer designs
System components for protection class and potting concepts
Requirements
Technical Requirements.
High Frequency
High Power
Thermal Stability
Reliable Insulation
Lead-Free Solder Compatibility
Engineering Features
Designed For Reliable Manufacturing.
Every product detail supports reliable winding, assembly, insulation and long-term production stability.
01
ETD and EER series are developed for converters in switch-mode power supplies
02
ETD series and EER series are further developments of the established EC series
03
ETD lr design supports minimized weight and shorter overall height
04
Protection class coil formers allow separated primary and secondary winding sections
05
Distance rings DR support creepage and clearance distances in protection class designs
06
Modular tooling concepts support fast customer-specific adaptations
Materials
Engineered Materials.
Material selection supports electrical insulation, thermal stability and long-term reliability in demanding industrial applications.
PET SKYT.5220FR / RTI +155°CPA66 A RV250 natural / RTI +100°CRadiation cross-linked materials on request
Material access
Standard materials, UL data and application-specific support.
Review NORWE standard plastic materials and UL-related data, or discuss alternative materials for specific thermal, electrical, processing or compliance requirements.
Technical Capabilities
Verified Technical Performance.
The product family is engineered around material performance, soldering resistance, connection technology and reliable processing.
01
Glass-fibre reinforced PET SKYT.5220FR with RTI +155°C for ETD and EER coil former variants
02
PA66 A RV250 natural with RTI +100°C for protection class components and potting boxes
03
Maximum soldering temperature up to +350°C for up to 2 seconds
04
Tin bronze, tin-plated solder pins depending on configuration
05
Brass, tin-plated solder blades depending on configuration
06
Radiation cross-linked materials and special executions available on request
Downloads & Drawings
Technical Documents Without Friction.
Technical documentation is connected to the product structure at article level. Current released drawings are supplied through NORWE with the exact product context preserved for engineering and procurement workflows.
Technical Resource
Technical Data
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Technical Resource
Drawing Information
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Technical Resource
Application Support
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Technical Resource
Quote Preparation
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Product documentation
Ordering Information
Family-specific ordering guidance for complex configurations, assembly options and order-code interpretation.
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Supplementary Product Information
Additional technical information for this product family and its article variants.
Request current Supplementary Product Information →Downloads & Drawings
91 released drawings available directly through the articles.
Select the matching product group and article. Released drawings can then be opened directly without submitting a request.
Existing Resource Categories
ETD/EER Ordering ExampleETD/EER Product InformationDistance Ring DescriptionSolder Pin OverviewSolder Blade OverviewPlastic Material ListRadiation Cross-LinkingETD Ferrite CoresEER Ferrite Cores
Technical FAQ
Frequently Asked Questions.
ETD and EER coil formers are winding bodies for high-frequency transformer applications, especially converters and switch-mode power supplies. They are based on established ferrite core geometries and support reliable winding, insulation and assembly concepts.
ETD lr is a reduced-height ETD design with minimized weight and shorter overall height. It is supported by dedicated ETD lr potting boxes for compact assemblies.
Typical ETD and EER coil former variants use glass-fibre reinforced PET SKYT.5220FR with RTI +155°C. Protection class components and potting boxes may use PA66 A RV250 natural with RTI +100°C depending on the variant.
Depending on configuration and material, ETD / EER coil former assemblies can support short-term soldering temperatures up to +350°C for up to 2 seconds.
Distance rings DR are used in protection class transformer concepts to support creepage and clearance distances between primary and secondary windings and to the core.
Yes. Special materials, radiation cross-linked materials and customer-specific executions are available on request depending on application, processing and insulation requirements.
Industries
Related Industries.
NORWE supports applications across industries where quality, reliability and technical confidence matter.
Industrial ElectronicsEnergy SystemsE-Mobility
Inquiry Engine
Move From Product Interest To Engineering Clarity.
Start with ETD / EER. NORWE can support your team with technical documents, sample requirements, quotation preparation and application-specific engineering questions.
Discuss Your Application.
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