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Precision-engineered copper alloy plates optimized for connector and terminal applications
C11000, also known as Electrolytic Tough Pitch (ETP) copper, is the most widely used commercial copper grade in the world. With a minimum copper purity of 99.90% and a precisely controlled oxygen content of 0.02–0.05%, C11000 copper plate delivers an exceptional combination of electrical conductivity (≥101% IACS), thermal conductivity, and mechanical workability that no other base metal can match at comparable cost.
In the connector and terminal manufacturing industry, C11000 copper plate serves as the foundational raw material. Whether stamped into automotive electrical terminals, rolled into PCB edge connectors, or machined into high-current bus bar connectors, C11000's consistent microstructure and predictable mechanical response make it the preferred substrate for engineers worldwide.
The global connector market, valued at over USD 85 billion in 2024 and projected to exceed USD 130 billion by 2032, is increasingly reliant on premium copper substrates. As device miniaturization accelerates and current densities rise, the material quality of the copper plate used for connectors and terminals becomes a decisive competitive factor.
| Property | Value / Range |
|---|---|
| Copper Content | ≥ 99.90% |
| Oxygen Content | 0.02% – 0.05% |
| Electrical Conductivity | ≥ 101% IACS |
| Thermal Conductivity | 388 W/(m·K) |
| Density | 8.89 g/cm³ |
| Tensile Strength (annealed) | 220 – 260 MPa |
| Elongation | ≥ 30% |
| Hardness (HRB) | 40 – 65 (temper-dependent) |
| Melting Point | 1083 °C |
| Available Forms | Plate, Strip, Foil, Sheet |
| Thickness Range | 0.05 mm – 50 mm |
| Standard | ASTM B152 / EN 1652 / GB/T 2040 |
Six macro forces reshaping the global connector and terminal copper materials landscape
Every electric vehicle contains 3–5 kg of copper in its high-voltage connectors, battery terminal plates, and charging interface components alone. With global EV production surpassing 14 million units in 2023 and accelerating, demand for C11000 copper plate in automotive-grade terminals is growing at over 18% CAGR. C11000's superior conductivity minimizes resistive heat loss in high-current applications up to 800A.
5G base stations require up to 4× more copper connectors than 4G equivalents, driven by massive MIMO antenna arrays and high-density RF connector assemblies. C11000 copper plate is the substrate of choice for SMA, N-type, and 2.4mm RF connectors due to its skin-depth conductivity advantage at microwave frequencies. Global 5G capex is expected to exceed USD 1.1 trillion through 2030.
Hyperscale data centers powering AI workloads demand ultra-low-resistance copper bus bars, server backplane connectors, and power distribution terminals. C11000 copper plate enables the dense power delivery architectures required by GPU clusters and high-performance computing nodes. The global data center copper demand is projected to grow 22% by 2027.
Industry 4.0 deployments require millions of precision sensor connectors, servo motor terminals, and PLC interface components. C11000 copper plate's excellent stamping and deep-drawing characteristics allow terminal manufacturers to achieve tolerances under ±0.01mm at high production volumes, reducing scrap rates and tooling wear compared to alternative alloys.
Solar inverter terminals, wind turbine slip ring contacts, and smart grid switchgear connectors all rely on C11000 copper plate for its combination of conductivity and corrosion resistance. With global renewable energy capacity additions reaching record levels annually, the grid-side copper connector market represents one of the fastest-growing segments for C11000 plate consumption.
Consumer electronics and wearable device connectors are shrinking below 0.3mm pitch while carrying higher currents. C11000 copper plate's exceptional ductility (elongation ≥30%) and fine-grain microstructure enable the ultra-thin stamping and precision etching processes required for next-generation micro-terminal arrays without cracking or delamination.
From automotive high-voltage systems to precision medical devices — where C11000 is indispensable
C11000 copper plate is stamped and formed into battery pack terminal blocks, cell interconnect busbars, and high-voltage junction box contacts for BEV and PHEV platforms. The material's 101% IACS conductivity reduces I²R losses in 400V/800V battery systems, directly extending driving range. Automotive-grade C11000 plate is typically supplied in H02 or H04 temper with surface roughness Ra ≤0.8μm for reliable crimp and weld joints.
Thin C11000 copper plate (0.1–0.5mm) is etched and plated to form edge card connectors, card-edge fingers, and ZIF socket contacts in consumer electronics and server motherboards. The base material's purity ensures consistent electroplating adhesion for gold, silver, and tin finishes, while its low work-hardening rate accommodates the multiple bending operations required during connector stamping.
DC fast-charging connectors (CCS, CHAdeMO, GB/T) operating at 250A–500A continuous current require C11000 copper terminals with precision-controlled spring-back behavior for reliable mating force over 10,000+ insertion cycles. C11000 plate in CDA 110 specification is the industry standard for Type 2 and CCS2 charging pistol pin contacts in European and Asian EV markets.
Lithium battery management relays and industrial contactors use C11000 copper plate bridges as the moving contact element. The material's thermal conductivity (388 W/m·K) rapidly dissipates arc energy during switching, while its softening resistance under cyclic thermal load ensures stable contact resistance over millions of operations. Kepai supplies C11000 plate specifically optimized for relay contact bridge applications.
Millimeter-wave 5G systems (24–100 GHz) demand connector body substrates with the lowest possible surface resistance. C11000 copper plate's high purity minimizes grain boundary scattering at RF frequencies, enabling silver-plated C11000 components to achieve insertion losses below 0.15 dB/connector at 28 GHz. This makes C11000 the preferred base material for SMA, 2.92mm, and 1.85mm precision RF connectors.
Switchgear bus bars, motor control center (MCC) terminals, and transformer tap connectors fabricated from C11000 copper plate handle currents from hundreds to thousands of amperes. The material's combination of high conductivity and adequate mechanical strength (220–260 MPa tensile) allows engineers to minimize conductor cross-section while meeting IEC 60439 temperature rise requirements, reducing cabinet size and material cost simultaneously.
High-purity C11000 copper plate is used in diagnostic imaging equipment connectors, patient monitoring terminal blocks, and surgical robot cable assemblies where signal integrity and biocompatibility of the plating substrate are paramount. The material's consistent purity (≥99.90% Cu) ensures predictable electroplating results for medical-grade gold and platinum surface finishes required by ISO 13485 certified connector manufacturers.
MIL-DTL-38999 and MIL-DTL-26482 series circular connectors use C11000 copper alloy pin and socket contacts as the current-carrying elements. Aerospace applications demand copper plate with tightly controlled grain size (ASTM 5–7) for consistent pin machining and plating adhesion across temperature ranges from -65°C to +200°C. C11000's proven performance in these demanding environments makes it a qualified material under MIL-C-17 and SAE AS standards.
Sichuan Kepai New Materials Co., Ltd., established in 2017, is a high-tech enterprise integrating research and development, production, and sales. Currently, the factory covers an area of approximately 9,000 square meters, with an office space of about 1,000 square meters. The company primarily engages in the production of strategic emerging new materials for the national 13th Five-Year Plan, including special copper alloys such as tellurium copper, high-conductivity oxygen-free copper, silver copper, and dispersion copper, while also focusing on the research and development of high-conductivity, easy-to-machine, high-strength copper alloys. The products are mainly applied in high-tech fields such as new energy vehicles, 5G technology, laser cutting, and lithium battery relays.
R&D at international cutting-edge levels in copper alloy science
Highest quality high-end copper alloy materials for global clients
Stable customer base across China and internationally renowned partners
Rooted in Sichuan, radiating nationwide, moving towards the world
Four pillars that make Kepai your trusted C11000 copper plate partner for connectors and terminals
Technological innovation is the core competitiveness of Sichuan Kepai New Materials Co., Ltd. The company has a research and development and production team composed of senior industry experts who keep pace with international cutting-edge technology trends and continuously explore the unknown boundaries in the field of new copper alloy materials. Through a combination of independent research and development and industry-university-research collaboration, Kepai has made breakthrough progress in several areas, including high-performance tellurium copper, lead copper, and sulfur copper. Many of its technological achievements have reached international advanced levels and have been successfully applied in various industries such as new energy vehicles, precision machining parts, plasma cutting, relays, and energy storage, earning widespread recognition and praise in the market.
Kepai's product line is rich and diverse, covering a comprehensive range of solutions from basic materials to high-end customization. We focus on providing customers with high-performance, high-quality high-end copper alloy products, including but not limited to pure copper, oxygen-free copper, oxygen-free high-conductivity tellurium copper, nickel tellurium copper, tin bronze, beryllium copper, lead bronze, sulfur copper, and chromium zirconium copper. These products play an important role in reducing production costs and enhancing product performance due to their excellent physical and chemical properties and environmental friendliness, creating significant economic and social benefits for customers.
In the face of global market competition, Sichuan Kepai New Materials adheres to the development strategy of "rooted in Sichuan, radiating nationwide, and moving towards the world." By continuously optimizing market layout and improving the sales network, we have established a stable customer base in multiple provinces and cities across the country and have formed long-term cooperative relationships with several internationally renowned enterprises. At the same time, the company actively expands into overseas markets, participates in international competition and cooperation, and strives to promote Kepai's brand influence on the global stage.
We understand that the long-term development of an enterprise is inseparable from an excellent corporate culture. We advocate the corporate spirit of "integrity, innovation, collaboration, and win-win," encouraging employees to explore boldly and innovate courageously, while also emphasizing teamwork and talent cultivation, striving to create a harmonious, open, and inclusive work atmosphere. We believe that only by continuously pursuing excellence and creating value can we win the trust of customers and the respect of society.
Quality certifications and market distribution credentials that validate our manufacturing excellence
State-of-the-art manufacturing and testing equipment ensuring C11000 copper plate meets the highest connector and terminal industry standards
Smelting
laying-off
extrusion
drawing
straightening
package
eddy current conductance instrument
Chemical composition test room
Metallographic sample polishing machine
Microcomputer controlled electro-hydraulic servo universal testing machine
Liquid crystal display electronic universal testing machine
Hardness tester
Explore our full portfolio of high-performance copper alloy materials engineered for precision electrical applications
Looking ahead, Sichuan Kepai New Materials Co., Ltd. will continue to uphold its original intention, with even greater enthusiasm and determination, to engage in research and application in the field of new materials, contributing to the development of the new copper alloy materials industry in China and globally. We look forward to working hand in hand with friends from all walks of life to create a brilliant future together!
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