This catalogue of coilformers contains information on all our products of the new ETD-Series and EER-Series.

Components of the ETD-series and EER-series are on-developments of the well known EC-range. They have been developed specially for converters in switch-mode power supplies.

We can supply coilformers made in high quality thermoplastics, matching your production requirements.

Accessories, such as potting boxes, safety class spacers and clips, are included in this catalogue.

All dimensions in mm/inch. The permissible deviations according to DIN 16901 apply as tolerances.

Whereever high-temperature soldering processes are used in connection with ETD/EER-Series coilformers, we recommend irradiation cross-linked plastics. This ensures that the mechanical properties, - in particular those of grf-polyamides - are maintained and breakages are reduced. For this reason NORWE offers all plastic components of the ETD/EER-Series in irradiated cross-linked materials.

In the short term, the cross-linked materials can be exposed to very high temperatures. Apart from improved aspects in production there may be interesting cost advantages, and a discussion with us could be useful.

Should you need further assistance, be it technical or to assist when placing your order, we look forward to hearing from you.

Fully tagged or pinned coilformers are - in small quantities - available from stock. We can quote for coilformers with pins or tags fitted to your requirements. All lead-times are relatively short.

Our extensive range of modular tooling allows almost unlimited constructional changes to meet custormers specification, often by simple changes of tool inserts.

In addition the modular tooling system allows extremely short tooling times and can be very cost effective.

ETD Coilformers Horizontal

The coilformers are made in gfr Polyethylene Terephthalate PET of type rtg nat. (RTI long-range temperature +155°C). Pin material is tin bronze, tinned for solder-pins and brass, tinned for solder-tags. Max. solder temperature 350°C, 2 sec. Special materials - e.g. irradiated cross-linked - and designs on request, dimensions in mm/inch.

The coilformers are avialable are avialable in the latest design ETD lr and in the well-establisched versions ETD standard with solder-pins and ETD standard with solder-tags. For each application the most suitable solution - inform yourself about the individual qualtities of the different designs on catalogue informations.

ETD Horizontal

ETD Coilformers Vertical

The coilformers are avialable in the well-establisched versions ETD standard with solder-pins and ETD standard with solder-tags. For each application the most suitable solution - inform yourself about the individual qualtities of the different designs on catalogue informations.

ETD Vertical

ETD Safety Class Coilformer Concentric Design

The coilformers are made in gfr Polyamide PA66 of type x2g5 (RTI long-range temperature +120°C). The solder-tags are punched from brass and are subsequently tinned. Soldering temperature 350°C max. up to 2 sec. Special materials - e.g. irradiated cross-linked - and designs on request, dimensions in mm/inch.

The ETD safty class coilformers have the advantage that the primary and secondary windings are wound seperately on the coilformer halves, with the two windings pushed together to form a complete winding assembly.

ETD Safety Class

ETD Potting Boxes Horizontal

The material used is gfr Polyamide PA66 of type x2g5 (RTI long-range temperature +120°C) Special materials - e.g. irradiated cross-linked - and design on request, dimensions in mm/inch.

The boxes are suitable as enclosures for horizontal ETD standard coilformers. When ordering please quote type and order-code.

ETD Potting Boxes Horizontal

ETD lr Potting Boxes Horizontal

The material used is gfr Polyamide PA66 of type x2g5 (RTI long-range temperature +120°C) Special materials - e.g. irradiated cross-linked - and design on request, dimensions in mm/inch.

The potting boxes with a height reduced by about 3 mm/0.118 inch are specially suitable for the new design of coilformers ETD lr which feature a minimized weight and overall height. When ordering please quote type and order-code.

ETD lr Potting Boxes Horizontal

ETD Potting Boxes Vertical

The material used is gfr Polyamide PA66 of type x2g5 (RTI long-range temperature +120°C) Special materials - e.g. irradiated cross-linked - and design on request, dimensions in mm/inch.

The boxes are suitable as enclosures for vertical ETD coilformers. (Not suitable für ETD coilformers with side-wrapping pins/tags.) When ordering please quote type and order-code.

ETD Potting Boxes Vertical

Safety Class with Spacers DR

Spacers are made in gfr Polyamide PA66 of type x2g5 (RTI long-range temperature +120°C), or gfr Polyethylene Terephthalate PET of type rtg nat. (RTI long-range temperature +155°C). Special materials - e.g. irradiated cross-linked - and designs on request, dimensions in mm/inch.

The application of spacers DR in round winding section is advantageous for achieving required creepage and clearances between primary and secondary, and to the core. The spacers can be used cumulative for all dimensions. When ordering please quote type and order-code.

Spacers DR

Clips FK-ETD

Suitable types of glues, such as Araldite, can be used to put ETD cores together. Constant pressure must be maintained on the core-halfes until the glue has hardened. More advantageous and economic are the easily assembled clips FK. They are in stainless steel and can be used for both horizontal and vertical assemblies.

The clamping pressure on the core-halves remains practically constand regardless of temperature, and no pull is exerted on the coilformer. Two clips are required per coilformer. A drop of glue may be used to connect coilformer and ferrite, also preventing frequency-noise. Other material thicknesses on request. When ordering please quote type and order-code.

FK-ETD 19 - FK-ETD 59

EER Coilformers Horizontal

The coilformers are made in gfr Polyethylene Terephthalate PET of type rtg (RTI long-range temperature +155°C). Pin material is tin bronze, tinned. Max. solder temperature +350°C, 2 sec. Special materials - e.g. irradiated cross-linked - and designs on request, dimensions in mm/inch.

The coilformers are available in the latest design with solder-pins. For each application the most suitable solution - inform yourself about the individual qualities of the different designs on catalogue informations.

EER Coilformers Horizontal

EER Coilformers Vertical

Ordering Example

Please kindly take all details which are necessary to execute your order correctly from the ordering example (pdf-file).

ETD Ordering Example

Additional Catalogue Informations

For explanatory and more detailed information on this coilformer-series, analogous to printed catalogue version, please kindly see the attached pdf-file.

ETD Catalogue-Infos