CUPAL sheets, washers, stripscut to your custom size
Galvanic-corrosion-free Cu/Al transitions for electrical assemblies — German-sourced material, cut to spec, with EN 10204 mill certificate and a 1-business-day quote.
- German-sourced material
- Quote within 1 business day
- EU-wide shipping
Describe briefly what CUPAL material you need:
Drag and drop files here
Up to 10 files · 4 MB total
We respond within 1 business day
CUPAL.hu is the dedicated CUPAL line of HIDRA-MIX Kft.hidramix.eu →Our Products
Copper-aluminium bimetal — 5 product lines
How to order — 4 simple steps
Tell us what you need
Via chat, email or the form — specify size, thickness and quantity. Attach a drawing if you have one.
Receive a quote quickly
We respond on business days within a few hours with a tailored quote. Not days, not weeks.
We cut to your specifications
Precision-cut to your exact shape and size. Circles, strips, rectangles, bespoke contours — anything.
Delivered across the EU
Carefully packaged and shipped fast. Within Hungary and throughout the entire European Union.
Tell us what you need
Via chat, email or the form — specify size, thickness and quantity. Attach a drawing if you have one.
Receive a quote quickly
We respond on business days within a few hours with a tailored quote. Not days, not weeks.
We cut to your specifications
Precision-cut to your exact shape and size. Circles, strips, rectangles, bespoke contours — anything.
Delivered across the EU
Carefully packaged and shipped fast. Within Hungary and throughout the entire European Union.
What is CUPAL?
CUPAL is a cold-roll bonded copper-aluminium bimetal composite: 70% aluminium, 30% copper. It is not an alloy — the two metals are joined by diffusion welding, and each side retains its original properties. Used wherever aluminium and copper conductors meet and galvanic corrosion must be prevented.
Know what you need?
Get a quote in 2 minutes — we respond within a few hours on business days.
Applications
Where CUPAL solves the problem
Six industries where the copper-aluminium transition is the weak link: from switchgear and lightning protection to EV fast chargers.
Switchgear
Corrosion-free transitions from aluminium busbars to copper cable lugs
Cable Lugs
Copper-aluminium joints that remain stable — no loosening, no corrosion
Lightning Protection
Outdoor Cu-Al-steel transitions built to last decades
Renewable Energy
Solar, wind, BESS, EV chargers — Cu/Al transitions that last 15+ years without galvanic corrosion.
Electric Vehicles
Lightweight, corrosion-free transitions for EV fast chargers
Busbars
Transition plates for corrosion-free copper-aluminium busbar connections
— Material standards
DIN 17007, DIN 1787, ISO 9001
CUPAL material standards (Al 3.0255 / Cu 2.0065) + WMH Westdeutscher Metall-Handel GmbH ISO 9001:2015 certified supply chain.
View details— Shipping
Stock sizes in 2–10 working days, custom cut in 5–10
From stock in Hungary; a custom order is 2–4 weeks EU door to door. We tell you exactly when it arrives.
View detailsKnowledge Base — CUPAL Technical Resources
10/26/2026
Laser cutting or punching? Custom CUPAL parts from a drawing — which process pays off when
A custom copper-aluminium part can be cut from CUPAL sheet in three ways: on a shear, by laser or with a punching tool. What decides between them, what is different with a bimetal, and what to put in your quote request to get an accurate price first time.
Read the full article →9/8/2026
Transition washer: toothed or bimetallic? How to tell which one your drawing means
Two physically different parts are sold as a transition washer — a toothed copper-alloy washer and a roll-bonded copper–aluminium bimetal disc. How to tell them apart, which suits which joint, and the 11 bimetal sizes from M6 to M20.
Read the full article →9/8/2026
Connecting Copper to Aluminium: Which Part for Which Joint
Copper meets aluminium in five different joints, and each one takes a different part — including one where the answer is not us. Which lug, splice, washer or cut plate fits, in what size, and which way round it goes.
Read the full article →Frequently asked questions about CUPAL
Questions? Or ready to order?
We reply within a few hours on business days — pick what's convenient.
Or talk to us directly: