Material Options
Glass-fibre reinforced PA66 p6g for EI/UI coil formers and PA66 p6g or CR-A3H2G3 black for selected potting housings
Laminated Core Geometry
EI / UI
Classic Laminated Core Transformer Applications
Coil formers and potting housings for EI and UI laminated core transformer applications, including small transformers and protection class transformer concepts.
Product Family
Family Overview.
EI / UI 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.
Small TransformersLaminated Core TransformersProtection Class TransformersPower Transformers50/60 Hz Transformer Applications
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
PA66 p6g with RTI +125°C and CR-A3H2G3 black with RTI +110°C depending on variant
Soldering Resistance
Maximum soldering temperature up to +350°C for short-term exposure up to 2 seconds for solderable variants
Pin & Blade Materials
Tin bronze, tin-plated solder pins or brass, tin-plated solder blades depending on connection technology
Design System
EI horizontal coil formers, EI vertical coil formers, UI coil formers and potting housings for protection class transformers
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
EJ 19 - EJ 78 Horizontal
EI Horizontal Coil Formers
Horizontal EI coil formers for EJ laminated core transformer applications with multiple connection technologies.
Core Range: EJ 19 - EJ 78Orientation: HorizontalMaterials: PA66 p6g
02
EJ 19 - EJ 60 Vertical
EI Vertical Coil Formers
Vertical EI coil formers for EJ laminated core transformer applications with flexible connection technologies.
Core Range: EJ 19 - EJ 60Orientation: VerticalMaterials: PA66 p6g
03
2UJ 30 - 2UJ 60 Horizontal
UI Coil Formers
UI coil formers for laminated core transformer applications with flexible connection technologies.
Core Range: 2UJ 30 - 2UJ 60Orientation: HorizontalMaterials: PA66 p6g
04
EJ 30/vlc - EJ 54/vlc Potting Housings
Accessory / Potting Housing
Potting housings for protection class EJ transformer applications and encapsulated transformer assemblies.
Core Range: EJ 30/vlc - EJ 54/vlcFunction: Potting and protectionMaterials: PA66 p6g and CR-A3H2G3 black
Advantages
Product Advantages.
Classic coil former system for EI and UI laminated core cuts
Horizontal and vertical EI coil former versions available
UI coil formers for laminated core transformer designs
Different connection technologies including press-fit pins, bent pins and solder blades
Potting housings for protection class transformer applications
Requirements
Technical Requirements.
Reliable Insulation
Creepage And Clearance Distance
Mechanical Stability
Radial And Axial Wire Termination
Transformer Safety Concepts
Engineering Features
Designed For Reliable Manufacturing.
Every product detail supports reliable winding, assembly, insulation and long-term production stability.
01
EI and UI coil formers are designed for laminated core cuts used in small transformers
02
Different construction forms and connection technologies support radial and axial wire termination
03
Connection technologies include press-fit pins, bent pins and solder blades depending on application
04
Potting housings support protection class transformer concepts and required creepage and clearance distances
05
Special forms allow constructive changes through interchangeable mold inserts
06
Modular tooling concepts support short manufacturing times for injection molds
07
Radiation cross-linked thermoplastics are recommended for high-temperature soldering processes
Materials
Engineered Materials.
Material selection supports electrical insulation, thermal stability and long-term reliability in demanding industrial applications.
PA66 p6g / RTI +125°CCR-A3H2G3 black / RTI +110°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 PA66 p6g with RTI +125°C for EI and UI coil formers
02
PA66 p6g with RTI +125°C and CR-A3H2G3 black with RTI +110°C for selected potting housings
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
Dimensions available in millimetres and inches depending on variant
07
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
Open the central document center for released technical and compliance documentation.
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Technical Resource
Drawing Information
Select a product group and article to access released article-specific technical drawings directly.
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Technical Resource
Application Support
Clarify product suitability, material questions and production-related requirements with NORWE.
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Technical Resource
Quote Preparation
Move from technical interest to quotation preparation with product and project context already included.
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Product documentation
Ordering Information
Family-specific ordering guidance for complex configurations, assembly options and order-code interpretation.
Open article ordering data →Product documentation
Supplementary Product Information
Additional technical information for this product family and its article variants.
Request current Supplementary Product Information →Downloads & Drawings
224 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
EI/UI Ordering ExampleEI/UI Product InformationPotting Housing InformationSolder Pin OverviewSolder Blade OverviewLaminated CoresPlastic Material ListRadiation Cross-Linking
Technical FAQ
Frequently Asked Questions.
EI / UI coil formers are winding bodies for laminated core transformer applications. They are used in small transformers, power transformers and protection class transformer concepts.
Horizontal EI coil formers support horizontal transformer assembly concepts, while vertical EI coil formers support upright transformer layouts. The correct version depends on the mechanical design, PCB layout and winding concept.
Depending on the variant, EI/UI coil formers can support press-fit pins, bent pins, solder pins and solder blades. These allow radial or axial wire termination for different applications.
EI and UI coil formers typically use glass-fibre reinforced PA66 p6g with RTI +125°C. Potting housings may use PA66 p6g or CR-A3H2G3 black depending on variant.
Potting housings are used for encapsulated transformer assemblies, especially protection class transformers where creepage and clearance distance requirements must be supported.
Yes. Special forms, alternative dimensions, accessories and radiation cross-linked material versions can be evaluated on request depending on application and production requirements.
Industries
Related Industries.
NORWE supports applications across industries where quality, reliability and technical confidence matter.
Energy SystemsIndustrial ElectronicsIndustrial Automation
Inquiry Engine
Move From Product Interest To Engineering Clarity.
Start with EI / UI. NORWE can support your team with technical documents, sample requirements, quotation preparation and application-specific engineering questions.
Discuss Your Application.
Talk to NORWE about EI / UI components, technical requirements and application-specific solutions.