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Always in buzzbar standard

CoppAl® busbars, conductive and lightweight

CoppAl® busbars, also called Cuponal, are made of our composite material, which optimally combines a highly conductive copper sheath with the lightness of the aluminium core.

We stand for innovative busbars

Do you quickly need a lightweight busbar prototype or a small series of CoppAl® busbars?

Whether for switchgear, control cabinets or other applications, we manufacture and supply solid busbars according to your design. Use our contact form for a quick and easy quotation and purchase process for busbars to buzzbar standard. 

✓ CuAL
✓ Cuponal
✓ Cupal
✓ Copper-clad aluminium busbars
✓ Bi-metal composite material 

buzzbar CoppAl®-Stromschienen
Deko Dots
buzzbar Kupfer-Stromschiene 4fach-Biegung
buzzbar CoppAl®-Stromschienen

Possible applications

CoppAl® is a bi-metal composite material that is used as an electrical connection in control cabinets, switchgear and distribution boards.


The machining processes such as drilling, bending, punching and sawing are comparable to those of copper busbars. CoppAl® busbars are available in buzzbar standard dimensions.

Special features of CoppAl® busbars

Our CoppAl® busbars are composite busbars made of copper and aluminium, also called CuAL or Cuponal. 

The copper sheath encloses the aluminium core of the busbars and is inseparably connected to it. In this way, we can optimally combine the positive properties of highly conductive copper with the low weight of aluminium. CoppAl® busbars are cheaper with the same current-carrying capacity, and thus a cost-saving alternative to copper busbars.

buzzbar manufacturing

Your possibilities

The buzzbar manufacturing standards are already a benchmark for the industry. This enables us to offer competitive prices with consistently high quality.

The real challenge is not high quality per se – but consistently high quality!

Our ambitious team guarantees compliance with the defined standards in order to further improve our products such as busbars. The buzzbar manufacturing ensure compliance with standards and tolerances.

buzzbar Ikon
buzzbar Logistik


Simply process CoppAl® in the same way as you are used to with conventional copper bars. Even bends of more than 90° are no problem. Neither the copper sheath nor the aluminium core will be damaged with a bending mandrel.

No. Under normal conditions, such as those found in electrical operating rooms, no increased corrosion occurs.

Outside of electrical operating rooms, with increased humidity and the presence of electrolytes (e.g. sea air), you must expect increased corrosion at the cut edges and in the area of the holes. In case of doubt, we therefore recommend additional corrosion protection (e.g. galvanic finishing, paint coating, grease, acid-free Vaseline).

Yes. Galvanised screws or stainless steel screws can be used under normal conditions without any problems.

In most cases, the same holder spacing can be used as for copper rails.

Most commercially available holders can be used here. If you decide to use CoppAl® , however, you should note that an approximately 20 % larger cross-section must be used compared to copper bars for the same rated current.

The thermal behaviour is similar to that of copper rails. The dynamic properties are between copper and aluminium rails.

For CoppAl® busbars, DIN 43 670, Part 2 (copper-clad busbars made of aluminium) applies.

CoppAl® semi-finished products as a basis

Properties CoppAl®

  • Composite rail made of aluminium core EN-AW1350 and copper sheath Cu-ETP blank
  • Tensile strength 130-170 MPa (N/mm²) 
  • Electrical conductivity min. 37.7 MS/m
  • Standard length: 4000 mm (tolerance: -0, +9 mm)
  • Thickness 5 to 12 mm
  • Width 20 to 120 mm
  • In some cases with rounded [RD] or sharp edges [SH]

Technical details CoppAl®

The standard rail length is 4000 mm. Other dimensions are also available as saw cuts on request!

For CoppAl® busbars, the current-carrying capacity applies according to DIN 43670 – Part 2, copper-clad busbars made of aluminium.

* Current load values: Ambient temperature 35 °C, AC current AC.

Heating of the busbar as a function of: Current intensity, ambient temperature, heat dissipation, type of routing, installation, application Multiplication factor 1.72 when using 2 busbars, multiplication factor 2.25 when using 3 busbars in parallel arrangement.

Get a busbar quote quickly & easily!

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1. Busbar variation

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