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Buy CoppAl® semi-finished products from stock

We simplify your small quantity procurement with our large buzzbar semi-finished product range from stock. Our semi-finished product procurement is distributed among various suppliers due to the risk of failure. Our dealer structure is tested and approved!

Save on your own stock management with our CoppAl® semi-finished products

Do you want to save on stock management for large quantities and only order the production portion you need? 

With our CoppAl® semi-finished product range of standard busbars, you can also order individual busbars or small quantities from buzzbar. Simply give us the quantities and dimensions of your desired CoppAl® busbars. 

All semi-finished products have a standard length of 4000 mm and are provided for you on special wooden racks. We at buzzbar will take care of the commissioning and delivery immediately after receiving your order.

buzzbar CoppAl®-Schienen
Deko Dots
buzzbar Material Aluminium, Cuponal & Kupfer
buzzbar Kupferhalbzeuge ab Lager

Possible applications

Semi-finished products are used as raw material for the production of busbars or other products. The procurement of smaller quantities is usually not possible. 


The solution: Order semi-finished products from the buzzbar standard product range and get only what you really need! A standard length of 4000 mm allows you to be flexible in your further processing. Shorter busbars can be found in our saw cuts.

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, thanks to the hydrostatic pressing process, 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.


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.

Properties of CoppAl® semi-finished products

  • 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® semi-finished products

The standard rail length is 4000 mm. Other dimensions are 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 depending on: 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.

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1. Semi-finished product variation

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