Customized Cuponal-Busbars

CoppAl® busbars (Cuponal) are made of our composite material with a highly conductive copper cover and lightweight aluminum core.



Conductor material

Cuponal-Busbars for your system-solutions

We look forward to hearing from you!

Light & conductive busbars

Innovative Cuponal or CoppAl® busbars

CoppAl® or Cuponal is a bi-metal composite material 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 bars. 

EMS CoppAl Busbars

The EMS Group is certified according to
DIN EN ISO 9001:2015

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Busbar manufacturing with quality & know-how

Our well-coordinated production in multi-shift operation ensures that we can react flexibly and produce your components and units in the desired quality.

In addition, we are able to produce single pieces, prototypes, small quantities, but also large busbars with expansive dimensions and in high quantities at consistently high quality.

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

Holistic system solutions
Customized Cuponal busbars
Engineering Service
Characteristics of CoppAl® busbars

Conductor material CoppAl® (Cuponal)

EMS Cuponal assembly

From cuponal semi-finished products to individual busbars

Our CoppAl® busbars are composite copper and aluminum busbars, also called CuAL or Cuponal. 

The copper sheath encases the aluminum core of the busbars and is inseparably bonded to it. In this way, we can optimally combine the positive properties of highly conductive copper with the low weight of aluminum. CoppAl® busbars are less expensive with the same current-carrying capacity, and are therefore a cost-saving alternative to copper busbars. For the individual design of your busbars, take advantage of our engineering know-how – we look forward to hearing from you!

Determined according to DIN 43670 - Part 2

Current carrying capacity CoppAl® busbars

Typenbez. / Type Breite / Width [mm] Dicke / Thickness [mm] Länge / Length [mm] Querschnitt / Cross-section [mm²] Gewicht / Weight [kg/4000mm] Scharfe Kanten / Sharp edges [SH] Gerundete Kanten / Rounded edges [RD] Strombelastung/ Current rating [A]* 65°C Art.-Nr. / Item no.
CUAL 20x5x4000 20 5 4.000 100 1,45 âś“ - 233 340042
CUAL 20x10x4000 20 10 4.000 200 2,90 âś“ - 357 340044
CUAL 30x5x4000 30 5 4.000 150 2,18 âś“ - 325 340043
CUAL 30x10x4000 30 10 4.000 300 4,37 âś“ - 481 340041
CUAL 40x10x4000 40 10 4.000 400 5,81 âś“ - 611 340008
CUAL 50x10x4000 50 10 4.000 500 7,26 âś“ - 736 340001
CUAL 60x10x4000 60 10 4.000 600 8,71 âś“ - 848 340009
CUAL 80x10x4000 80 10 4.000 800 11,62 âś“ - 1.074 340010
CUAL 100x10x4000 100 10 4.000 1.000 14,52 - âś“ 1.282 340002
Strombelastung/ Current rating [A]* 65°C

* 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 rails, multiplication factor 2.25 when using 3 rails in parallel arrangement.

EMS Logo
At EMS, we ensure that all components meet the defined requirements and, if required, we also take care of the installation of your busbar systems.

Our service


+ Individual offer
+ Detailed measurement
+ Guarantees
+ Contract conditions
+ Cost optimization
+ PPAP production release procedure
+ APQP guidelines
+ Audits


+ Project management
+ Technical engineering
+ Cross-section design
+ Magnetic field calculation
+ 3D layout creation
+ Feasibility check

Customized manufacturing

+ Processing standard DIN EN 13601
+ Connecting pieces in welding systems
+ Individual perforations
+ Bending
+ Deburring
+ Punching
+ Sawing
+ Soldering
+ Personalizations


+ Worldwide shipping
+ High quality packing
+ Upon request according to specification
+ Reliable & just-in-time
+ Dynamic capacity adjustment


+ Pre-assembly ex works
+ On-site installation
+ Supervision

After Sales

+ Maintenance
+ Spare parts requirement
+ Retro-fit

Engineering know-how

CoppAl® or Cuponal Busbars customized

System solutions for your market

Getting to know fields of application

We have years of experience in engineering individual solutions for your requirements. In addition, we have the necessary “workbench” to manufacture the associated components on site.

EMS Elektro Metall SchwanenmĂĽhle GmbH

+49 6307 9916 691

You have questions or need an offer? Then contact us - we look forward to hearing from you!

EMS DIN ISO 9001:2015 Zertifikat