Material Options
PET rtg natural, PA66 A3X2G10 and special materials on request depending on variant
Economic Flat Design
EFD
Low-Profile Transformer Applications
Low-profile coil formers, potting housings and clamping brackets for compact transformer applications where reduced height and reliable PCB assembly are essential.
Product Family
Family Overview.
EFD 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.
Low-Profile TransformersSwitch-Mode Power SuppliesLED DriversCompact Power SuppliesIndustrial Electronics
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 rtg natural with RTI +155°C and PA66 A3X2G10 with RTI +115°C depending on variant
Soldering Resistance
z6 versions support maximum soldering temperature 300/350°C up to 2 seconds; z8 versions support +350°C up to 2 seconds
Pin Materials
Tin bronze, tin-plated solder pins
Design System
EFD coil formers with z6 solder pins, EFD coil formers with z8 solder pins, EFD potting housings and SB-EFD clamping brackets
Special Materials
Radiation cross-linked thermoplastic materials are recommended for high-temperature soldering processes and 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
EFD 15 - EFD 30 With z6 Solder Pins
EFD Coil Formers With z6 Solder Pins
EFD coil formers with straight press-fit z6 solder pins for radial wire termination and low-profile transformer applications.
Core Range: EFD 15 - EFD 30Pin Type: Straight press-fit z6 solder pinsMaterials: PET rtg natural
02
EFD 15 - EFD 30 With z8 Solder Pins
EFD Coil Formers With z8 Solder Pins
EFD coil formers with stable z8 solder pins for radial wire termination and applications using thicker wires.
Core Range: EFD 15 - EFD 30Pin Type: Straight press-fit z8 solder pinsMaterials: PA66 A3X2G10
03
EFD Potting Housings
Accessory / Housing
Potting housings designed for standard EFD coil formers with z6 or z8 solder pins.
Function: Potting and protectionApplication: Standard EFD coil formers with z6 or z8 solder pinsMaterials: PET rtg natural
04
SB-EFD 15 - SB-EFD 30 Clamping Brackets
Assembly Component
Steel clamping brackets for connecting EFD ferrite core halves with stable pressure over temperature changes.
Core Range: SB-EFD 15 - SB-EFD 30Function: Mechanical clamping of ferrite core halvesMaterial: Steel
Advantages
Product Advantages.
Developed for low transformer construction heights
z6 and z8 solder pin versions available
Potting housings for protected EFD assemblies
Steel clamping brackets for ferrite core fixation
Spacer elements help prevent blind soldering on the PCB
Requirements
Technical Requirements.
Low Profile
Compact Design
Reliable PCB Assembly
Thermal Processing Stability
Automated Winding
Engineering Features
Designed For Reliable Manufacturing.
Every product detail supports reliable winding, assembly, insulation and long-term production stability.
01
EFD ferrite cores are based on the classic E-series but use a flattened, lower center leg
02
The winding structure is embedded inside the coil former and ferrite core halves
03
z6 solder pin versions support radial wire termination and very short soldering times for thin wires
04
z8 solder pin versions support particularly thick wires
05
Wire guidance and strain relief pins support reliable winding and connection handling
06
Spacer elements to the printed circuit board help prevent blind soldering caused by covered PCB holes
07
Potting housings are dimensioned for standard EFD coil formers with z6 or z8 solder pins
08
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 rtg natural / RTI +155°CPA66 A3X2G10 / RTI +115°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
PET rtg natural with RTI +155°C for z6 coil formers and potting housings
02
PA66 A3X2G10 with RTI +115°C for z8 coil formers
03
Tin bronze, tin-plated solder pins
04
z6 versions support maximum soldering temperature 300/350°C for up to 2 seconds
05
z8 versions support maximum soldering temperature +350°C for up to 2 seconds
06
Steel SB-EFD clamping brackets for ferrite core fixation
07
Dimensions available in millimetres and inches depending on variant
08
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
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
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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
14 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
EFD Ordering ExampleEFD Product InformationSolder Pin Overview For EFD SeriesEFD Ferrite CoresPlastic Material ListRadiation Cross-Linking
Technical FAQ
Frequently Asked Questions.
EFD coil formers are winding bodies for Economic Flat Design ferrite core geometries. They are developed for transformer applications where low construction height and compact PCB integration are required.
z6 versions use straight press-fit z6 solder pins and are suitable for radial wire termination with very short soldering times for thin wires. z8 versions use stable z8 solder pins and are suitable for particularly thick wires.
Depending on the variant, NORWE uses PET rtg natural with RTI +155°C or PA66 A3X2G10 with RTI +115°C. Special materials and radiation cross-linked versions are available on request.
EFD potting housings are designed for standard EFD coil formers with z6 or z8 solder pins and support protected, encapsulated EFD transformer assemblies.
SB-EFD clamping brackets are steel components used to hold EFD ferrite core halves together. One bracket is required per core set and coil former.
Spacer elements create defined distance to the printed circuit board and help prevent blind soldering caused by covered PCB holes.
Industries
Related Industries.
NORWE supports applications across industries where quality, reliability and technical confidence matter.
Industrial ElectronicsEnergy SystemsTelecommunications
Inquiry Engine
Move From Product Interest To Engineering Clarity.
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Discuss Your Application.
Talk to NORWE about EFD components, technical requirements and application-specific solutions.