Explore our catalog of high-performance copper conductors and custom stamping components engineered to meet global standards.
An in-depth look at technical specifications, industrial relevance, and application engineering of 25 mm² conductors.
In modern industrial and heavy-power settings, a 25 Sq Mm flexible copper stranded wire represents the gold standard for high-current, low-voltage connectivity. The core challenge of distributing high electrical current lies in balancing thermal efficiency with physical flexibility. Solid copper bars present installation constraints, whereas finely stranded copper wires offer the flexibility required to navigate tight bends and absorb structural vibrations.
At Zhejiang Xingma Copper Industry Co., Ltd., our 25 Sq Mm wires are manufactured utilizing high-purity electrolytic copper (Cu-ETP, copper content ≥99.9%). The flexible stranding architecture consists of hundreds of ultra-thin, annealed copper wire filaments (typically 0.15mm to 0.20mm in diameter) bundled together. This specific configuration minimizes the skin effect at high frequencies, optimizes thermal dissipation, and yields an ultra-low electrical resistance profile that ensures compliance with international standards such as IEC 60228 Class 5 and Class 6.
Furthermore, our materials are highly compatible with automated crimping and welding operations, which reduces contact resistance at critical connection interfaces.
| Parameter | Value / Specification | Test Standard / Notes |
|---|---|---|
| Material Purity | ≥ 99.90% Copper (T1 / T2 Red Copper) | GB/T 467-1997 / ASTM B5 |
| Electrical Conductivity | ≥ 100% IACS | Standard Annealed Copper Condition |
| DC Resistance (at 20°C) | ≤ 0.780 Ω/km (Bare), ≤ 0.795 Ω/km (Tinned) | IEC 60228 / BS EN 60228 |
| Wire Class | Class 5 (Flexible) / Class 6 (Extra Flexible) | DIN VDE 0295 |
| Filament Diameter Range | 0.15 mm - 0.20 mm | Precision drawn on Fuchuan beam machines |
| Tensile Strength | 200 - 250 N/mm² | Annealed mechanical state |
| Elongation at Break | ≥ 25% | Ensures high bending durability |
Analyzing the macro-economic forces pushing high-flexibility heavy cables into the center of the electrification wave.
With electric vehicle (EV) architectures shifting toward high-voltage systems (800V and above), robust 25 Sq Mm copper cables are essential. They act as reliable battery busbar connections, handling high charging currents while enduring constant shock and vibration.
Robotic arms and dynamic machinery rely on multi-axis movements. Standard rigid conductors fail under continuous bending cycles. Our Class 6 extra-flexible copper stranded wire prevents wire fatigue and failure in robotic drag chains.
Decentralized energy sources like wind turbines and commercial solar systems require durable grounding and terminal lines. High-grade tinned stranded copper wire prevents environmental degradation in coastal wind installations and desert solar farms.
Highly engineered, bend-resistant connections crafted at our ISO-certified facilities.
Deploying 25 Sq Mm copper connections across high-voltage and heavy industrial sectors globally.
Used extensively in electric vehicle (EV) battery management systems, power train routing, and charging ports. Our 25 mm² conductor supports rapid charging currents while withstanding vehicle vibration and temperature fluctuations.
Essential for clean grounding in telecommunications switches and data centers. Provides pathing for stray voltages and limits electromagnetic interference (EMI) to protect high-frequency signal systems.
Acts as bridge connectors between moving contacts in circuit breakers, high-voltage isolators, and power switchboards. The ultra-low contact resistance prevents thermal hot-spots during heavy-duty utility routing.
Deployed in electrochemical plants, induction furnaces, and heavy machinery mining equipment. Provides high durability under harsh environments where chemical exposure or physical movement is standard.
Connecting solar inverter systems, offshore wind turbines, and utility-scale energy storage battery racks. Resists atmospheric corrosion via advanced tin-coating technology.
Located in Liushi, the electrical capital of China, Zhejiang Xingma Copper Industry operates a comprehensive, modern processing ecosystem.
Located in Liushi, the capital of electrical appliances in China, with integrated local logistics. Offers direct access to national logistics hubs and major international export terminals, including Shanghai Port and Ningbo Port.
Our raw material supply chain benefits from regional concentration. Proximity to major copper refining markets ensures access to high-purity copper and reduces material transport times, stabilizing lead times for high-volume orders.
Our workshop handles the entire process, including wire drawing, precision cutting, spot welding, and metal stamping. Equipped with advanced machinery like Fuchuan beam machines and Dingtian drawing systems, we control quality from raw rod to finished connection.
With years of export experience, our products are trusted in Europe, the Americas, and the Middle East. Operating under ISO9001 and ISO14001 certifications, we ensure compliance with international manufacturing and environmental standards.
How Xingma Copper is positioning for the next decade of advanced electrical connection demands.
The electrical industry is transitioning toward extreme performance requirements. High-power density applications require conductors that run cooler under load, withstand higher mechanical stress, and maintain stable electrical contact over decades.
Our technical roadmap focuses on three main developments:
In step with global sustainability trends, we operate in compliance with environmental standards, working to lower carbon emissions per ton of processed copper, which has earned our status as an industry leader.
Established in 2019, leading the copper wire and metal stamping market from China's electrical capital.
Zhejiang Xingma Copper Industry Co., Ltd. was established in 2019 and is located in Liushi, the capital of electrical appliances in China. We are primarily engaged in metal products, wire and cable processing and sales, as well as the import and export of goods and technologies. The company is built around a modern enterprise mechanism and semi-automated to fully-automated mass production systems.
Our main products include copper wire, copper braided wire, copper stranded wire, soft copper stranded wire, carbon brush wire, soft connection series, and custom metal stamping parts. Our products are sold both domestically and internationally, earning trust from customers worldwide.
Our facility features a construction area of over 10,000 square meters and houses more than 100 employees. We operate over 300 domestic manufacturing machines, including: Dingtian wire drawing machines, Fuchuan beam machines, pipe twisting machines, braiding machines, annealing furnaces, middle drawing machines, automatic cutting machines, welding machines, air dryers, microscope hardness testers, automatic punching machines (up to 160-ton), wire dividing machines, flattening machines, large polishing machines, stamping parts cleaning lines, bench drills, and packaging lines, yielding an annual production capacity of over 2,000 tons.
The company abides by the Universal Declaration of Human Rights and major United Nations conventions, respects human and labor rights, opposes discrimination and harassment, and promotes a culture of mutual respect and continuous improvement. Relying on our manufacturing base and focusing on scientific and technological innovation, we continue to expand and develop related product sectors.
We achieved ISO9001 Quality System Certification and ISO14001 Environmental Management System Certification in 2020. In 2021, the company was recognized as a "Star Enterprise" and "Excellent Production Enterprise." Zhejiang Xingma is also a member unit of the Zhejiang Cable Accessories Industry Association and a member unit of the China Forging Association.
Answers to common technical, commercial, and engineering questions regarding 25 Sq Mm copper connections.
The ampacity rating of a 25 Sq Mm copper stranded wire depends on the installation method, environmental temperature, and insulation class. In open air at an ambient temperature of 30°C, a 25 Sq Mm conductor insulated with XLPE or PVC typically supports between 110A to 140A. For high-flexibility applications without insulation (bare copper braid), ratings may vary depending on airflow and exposure.
Tinned copper wire features a micro-layer of tin plating over the copper strands. This layer protects the underlying copper from oxidation in high-humidity, marine, or chemically corrosive environments. It also simplifies soldering processes. Bare copper is suitable for dry environments where cost efficiency is preferred and oxidation risk is minimal.
Under the IEC 60228 standard, Class 5 specifies standard flexible conductors, while Class 6 outlines extra-flexible conductors. Class 6 wires utilize thinner individual copper filaments (e.g., 0.15mm) and a higher thread count than Class 5. This makes Class 6 conductors suitable for applications involving continuous motion, such as drag chains and dynamic robotic links.
Yes. We specialize in custom-engineered connections. We can cut stranded wire, apply high-pressure stamping, and weld custom copper terminals using press-welding or spot-welding technology to match your drawings and dimensional requirements.
We conduct routine physical and electrical testing to ensure quality. Tests include DC resistance measurements with micro-ohmmeters, tensile strength and elongation tests, and microscopic hardness evaluations. All processes align with our ISO9001 certification.
Lead times depend on order size and customization specs. Standard spools of 25 Sq Mm copper wire ship in protective spools or reels. Custom cut-and-welded parts are packed in anti-oxidation wrapping and outer cartons to prevent damage during shipping.
Providing custom connectors and copper components for global industrial requirements.
Zhejiang Xingma Copper Co., Ltd. is ready to work together with you to achieve win-win results! Based on the national market and closely combining the characteristics of various industries, we dig deep into customer applications. Relying on strong manufacturing strength, integrating cutting-edge technical concepts, and quickly responding to changing needs of customers, we provide reliable, high-quality, and easy-to-expand product customization solutions.
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