Buyers who source copper clad aluminum wire from China ask the same questions. Can the factory hold tight tolerances? Which copper ratios are available? Can the wire be tinned, enameled or stranded? How much does it save compared with pure copper?
This guide answers those questions. It is written for importers, distributors, cable makers, coil winders and procurement teams that need a reliable copper clad aluminum wire manufacturer in China. All technical data comes from the CCA range produced by Junrun in Zhangjiagang, Jiangsu.Copper clad aluminum (CCA) wire has an aluminum core and an outer copper layer, joined by a metallurgical bonding process. The result is a conductor that is lighter and lower in cost than solid copper, with a copper surface for soldering and termination. Junrun also supplies CCAM wire, which uses a magnesium-containing aluminum alloy core.
CCA Wire from 0.1mm to 4.5mm with ±0.005mm Diameter Tolerance
Our standard copper clad aluminum wire covers round diameters from 0.1mm to 4.5mm. Diameter tolerance is ±0.005mm.
Tolerance matters because it controls resistance, drawing behavior and winding quality. A stable diameter gives you predictable resistance per meter. It also reduces breaks during stranding, coiling and stripping. When you compare suppliers, ask for the tolerance in writing and ask how they check it.
If your project needs a diameter outside this range, send the target size and application. Our team will confirm what is possible.
8%–42% Copper by Volume, 58%–80% IACS Conductivity
The copper ratio is the most important specification of any CCA wire. More copper raises conductivity, density and cost. Less copper lowers weight and cost, but also lowers conductivity.
Our CCA wire is available from 8% to 42% copper by volume, which equals 22% to 70% by weight. Conductivity ranges from 58% to 80% IACS. The table below summarizes the full range.
| Parameter | CCA Wire, Flat Wire, Strip and Foil |
| Copper layer material | TU0, TU1, T1, T2, brass, Ag-Cu alloy, Cu-P alloy; OFE C101, C102, C110 |
| Aluminum core | 1060, 1070, 1080, 1350, 5154, 6061, 8030 |
| Round wire diameter | 0.1mm – 4.5mm (tolerance ±0.005mm) |
| Flat wire thickness | 0.03mm – 2mm (tolerance ±0.003mm) |
| Flat wire width | 0.3mm – 12mm (tolerance ±0.03mm) |
| Density | 3.19 – 5.3 g/cm³ |
| Copper by volume | 8% – 42% |
| Copper by weight | 22% – 70% |
| Resistivity | 0.022 – 0.027 Ω·mm²/m |
| Conductivity | 58% – 80% IACS |
| Forms available | Bare, tinned, enameled and stranded |
| Cost vs. copper wire (product data) | About 40%–50% lower (bare); about 50%–60% lower (tinned, enameled, stranded) |
How to choose the copper ratio
Start with your target resistance and your weight limit. Then choose the lowest copper ratio that still meets the resistance requirement. For high-frequency signals such as RF and coaxial cable, current travels near the surface of the conductor. That is why CCA suits many communication cable designs.
If you are unsure, share your drawing or current copper wire specification. We can match a CCA structure to it.
Round Wire, Flat Wire, Strip and Foil, Made to Your Specification
Junrun supplies CCA in more than one shape. Round wire is the most common. Flat wire, strip and foil are available for busbars, ribbons and windings.
- Round wire: 0.1mm to 4.5mm diameter, for cables, harnesses, coils and stranding.
- Flat wire, strip and foil: thickness from 0.03mm to 2mm (±0.003mm) and width from 0.3mm to 12mm (±0.03mm).
- Custom structure: width, thickness and copper layer ratio can be adjusted to your requirement.
The flat profile has rounded corners, a uniform cross-section and a smooth surface without peeling or bubbles. Compared with pure copper flat wire, weight drops by more than 40%. The flat shape also gives good heat dissipation and saves installation space.
Copper Layer in TU0, TU1, T2 or Brass, on 1060–8030 Aluminum Cores
Material choice affects conductivity, strength and processing. We offer a range of copper layer and aluminum core options.
- Copper layer: oxygen-free copper (TU0, TU1), T1, T2, brass, Ag-Cu alloy and Cu-P alloy. OFE grades C101, C102 and C110 are also available.
- Aluminum core: 1060, 1070, 1080, 1350, 5154, 6061 and 8030.
As a general rule, 1000-series cores favor conductivity, while alloy cores such as 5154 and 6061 favor strength. Tell us your priority and your process, such as fine drawing, winding or stranding. We will recommend a combination and confirm it with a sample.
Direct Factory Supply of Bare, Tinned, Enameled and Stranded CCA Wire
As a copper clad aluminum wire factory, Junrun supplies the full range of finished forms from one source. This reduces the number of suppliers you manage.
- Bare CCA wire, for cables, harnesses and general conductors.
- tinned copper clad aluminum wire, for soldering, terminals and better oxidation resistance.
- Enameled copper clad aluminum wire, for motors, transformers, inductors and precision coils.
- Stranded CCA wire, for flexible cables and lead wires.
Our product data shows that tinned, enameled and stranded CCA wire can cost about 50%–60% less than the equivalent copper wire. Bare CCA wire can cost about 40%–50% less. Actual savings depend on the copper and aluminum market prices at the time of your order.
Custom CCA and CCAM Wire Made in Zhangjiagang, Jiangsu, China
Junrun produces in Zhangjiagang City, Suzhou, Jiangsu Province. The factory makes standard sizes and custom orders. Custom options include diameter, copper ratio, surface treatment, stranding structure and packaging.
For projects that need more mechanical strength, our copper clad aluminum alloy wire range uses alloy cores, including magnesium alloy cores (CCAM). Ask our team for the data sheet that matches your diameter and temper.
Enameled copper clad aluminum alloy wire is also possible for winding applications. Send your insulation class, diameter and coil design so we can confirm feasibility.
Your Trusted CCA Wire Supplier, with Sampling and Fast Quotation
A reliable copper clad aluminum wire supplier should make the buying process simple and testable. Our process has four steps.
- Send your brief: material, diameter, surface, structure, quantity and packing needs.
- Our team matches the specification and confirms the details with you.
- We prepare samples for soldering, winding, cabling or terminal validation.
- You test the samples, and we send a quotation for the confirmed specification.
Supplier selection checklist
- Tolerance is stated in writing, not only as a general claim.
- Copper ratio is given by both volume and weight.
- The copper layer is bonded evenly, with no delamination.
- Samples are available before you place a full order.
- Spool type, packing and labeling match your production line.
- Batches are consistent from one shipment to the next.
From Bonding and Drawing to Annealing: One-Stop CCA Production
Consistent CCA wire depends on controlling every step of the process. Junrun manages the full route in one workflow:
- Bonding and welding of the copper layer to the aluminum core.
- Drawing to the target diameter.
- Annealing to set the mechanical properties.
- Surface treatment, such as tinning or enameling.
- Take-up onto spools and outgoing inspection.
We focus on batch stability, surface appearance and outgoing inspection. For each order, ask for the test data that matches your batch and your acceptance criteria.
Lightweight Copper Clad Aluminum Wire That Cuts Conductor Cost by 40–50%
Aluminum is much lighter than copper. Our CCA wire has a density of 3.19–5.3 g/cm³, compared with about 8.9 g/cm³ for pure copper. You get more meters of wire per kilogram, which lowers material cost. Lower weight also reduces freight and handling cost, and it makes installation easier.
Our product data shows a cost advantage of about 40%–50% against copper wire. Treat this as a reference figure. Copper prices change often, so the real saving depends on the market on the day you order. Ask for a current quotation and compare it against your copper price.
A Lower-Cost, Lighter Alternative to Pure Copper Wire
CCA is a practical replacement for pure copper in many designs. It is not a replacement in every design. Buyers should weigh both sides.
Where CCA performs well
- Weight-sensitive products, such as harnesses and portable equipment.
- Cost-sensitive volume production, such as coils and internal wiring.
- Signal and RF conductors, where surface conduction matters.
- Applications that need a copper surface for soldering.
What to check first
- Conductivity is 58%–80% IACS, below pure copper. For the same resistance, you may need a slightly larger diameter or a higher copper ratio.
- Some cable standards and local codes require solid copper. Category data cables and power-over-Ethernet cables are common examples. Confirm the rules for your product and market.
- Terminals and connectors must suit the conductor. Test a sample before mass production.
Being clear about these limits helps you choose the right structure and avoid problems after delivery.
Solderable, Corrosion-Resistant CCA Wire for Cable and Coil Makers
The copper outer layer gives CCA wire good solderability and oxidation resistance for typical use. Tinned CCA adds a tin surface, which helps soldering and terminal work and protects the copper during storage.
Follow a few handling rules for best results:
- Store spools in a dry, clean place, in their original packing.
- Avoid exposing the aluminum core at cut ends where moisture can reach it.
- Run a soldering or termination test on a sample before you approve a full order.
CCA Wire for Coaxial Cable, Coils, Motor Leads and Wire Harnesses
Our round CCA wire serves a wide range of end uses:
- Building wiring and civil electrical wires and cables.
- Communication cables and coaxial cable conductors.
- Internal wiring for home appliances.
- Motor leads and coils.
- Lighting wiring.
- Security monitoring cables.
- Photovoltaic auxiliary materials.
Each application has its own performance and standard requirements. Share yours, and we will suggest a suitable structure.
CCA and CCAM Conductors for Telecom, New Energy and Automotive Use
Three sectors account for much of the demand for lightweight composite conductors.
Telecom and network cabling: CCA conductors serve coaxial cable, RF transmission and signal links. Weight and cost savings add up over long cable runs.
New energy: solar, energy storage and charging equipment use CCA where weight, conductivity and surface finish must balance.
Automotive: lightweight conductors reduce harness weight in vehicles, including new energy vehicles. Bend resistance and process consistency matter most here.
For export orders, tell us your destination and packing requirements. We will include them in the quotation.
CCA Flat Wire and Ribbon for PV Solar, Busbar and Energy Storage
Flat CCA products suit high-current and space-limited designs. Typical uses include PV welding ribbon substrate, busbar trunking, transformer windings, energy storage connection bars, internal conductors for charging piles, electrical control equipment wiring and lapped coils.
For solar module makers, Junrun offers PV/solar tinned CCA ribbon for cell interconnection and busbar use. For black or reflective busbar ribbon, send your drawing, width and thickness targets so we can confirm the finish and size.
What Is CCA Wire? Specs, Copper Ratios and Uses Explained
Copper clad aluminum wire is a bimetallic conductor. An aluminum core carries most of the volume, and a copper layer covers the surface. Junrun's CCA wire measures 0.1mm to 4.5mm in diameter, contains 8%–42% copper by volume, and reaches 58%–80% IACS conductivity. It is used in cables, coils, harnesses, solar ribbon and energy equipment.
Frequently Asked Questions
What is copper clad aluminum wire?
Copper clad aluminum wire is a conductor with an aluminum core and a bonded copper outer layer. It costs less and weighs less than solid copper, and its copper surface supports soldering and connection.
How much cheaper is CCA wire than copper wire?
Our product data shows about 40%–50% lower cost for bare CCA wire and about 50%–60% for tinned, enameled and stranded types. Real savings depend on market metal prices, so request a current quotation.
What diameters and sizes are available?
Round wire ranges from 0.1mm to 4.5mm with ±0.005mm tolerance. Flat wire is available from 0.03mm to 2mm thick and 0.3mm to 12mm wide. Custom sizes can be discussed.
Can CCA wire be tinned, enameled or stranded?
Yes. Junrun supplies bare, tinned, enameled and stranded CCA wire, plus copper clad aluminum alloy wire for higher strength needs.
Is CCA as conductive as pure copper?
No. Conductivity is 58%–80% IACS, depending on the copper ratio. Pure copper is 100% IACS. Choose the copper ratio to meet your resistance target, and check that your cable standard allows CCA.
Can I get samples and a custom specification?
Yes. Send your material, diameter, surface, structure and quantity. We support specification matching, sample preparation for testing, and quotation.
Conclusion
Choosing a copper clad aluminum wire manufacturer comes down to clear specifications, consistent quality and honest technical advice. Junrun supplies CCA and CCAM wire from 0.1mm to 4.5mm, with copper content from 8% to 42% by volume, in bare, tinned, enameled and stranded forms, plus flat wire, strip and foil.
If you are comparing suppliers or planning a switch from pure copper, we are ready to help. Tell us your application, diameter range and target parameters. Our team can provide product details, samples, customization advice and a quotation. Contact our sales team or email sonia@junrun-supercon.com.