{"id":1055,"date":"2025-06-17T16:13:36","date_gmt":"2025-06-17T07:13:36","guid":{"rendered":"https:\/\/hem.co.jp\/global\/?page_id=1055"},"modified":"2025-09-24T17:05:08","modified_gmt":"2025-09-24T08:05:08","slug":"e-special-d-type-s3","status":"publish","type":"page","link":"https:\/\/hem.co.jp\/global\/e-special-d-type-s3","title":{"rendered":"Oxygen-Free Copper (OFC) Battery Terminal (Conversion Type)"},"content":{"rendered":"\n
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Battery Terminals Preferred by Auto Electrical Repair Professionals<\/h1>\n<\/div>\n<\/div>\n\n\n\n
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Oxygen-Free Copper (OFC) Battery Terminal (Conversion Type)<\/h2>\n<\/div>\n<\/div>\n\n\n\n
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Oxygen-Free Copper (OFC) Battery Terminal (Conversion Type)
DXL SET \/ DXL PEAR SET Series<\/p>\n\n\n\n

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Oxygen-Free Copper (OFC) Battery Terminal (Conversion Type)
DXS SET \/ DXS PEAR SET Series<\/p>\n\n\n\n

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\nBy bringing together proprietary technologies and know-how cultivated through years of professional use, we create new value in battery terminals.\n<\/div>\n\n\n\n

To ensure the efficient and stable delivery of power from lead-acid batteries used in automobiles to various electrical components, we have adopted oxygen-free copper (OFC) of exceptional quality\u2014with a purity of 99.96% or higher and minimal impurities or additives\u2014as the main material. Renowned for its outstanding conductivity, OFC enables superior electrical performance. Drawing on over half a century of expertise as a specialized manufacturer of automotive replacement parts, we have infused this product with our accumulated know-how. Manufactured entirely in Japan to meet Hero Electric\u2019s exacting standards, this battery terminal is truly one of a kind.<\/p>\n\n\n\n

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When automotive audio systems are upgraded or in-vehicle theater systems are installed, the overall power demand increases significantly. To accommodate this higher demand, it becomes necessary to install higher-capacity lead-acid batteries, which, by design, feature thicker battery poles (electrodes).<\/p>\n\n\n\n

This groundbreaking battery terminal functions as an adapter, enabling the use of the vehicle\u2019s original terminal designed for smaller-diameter posts, even when upgrading to a high-capacity battery. It eliminates the need to replace the vehicle-side terminal, allowing for a smooth and modification-free installation.<\/p>\n<\/div>\n\n\n\n

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\"MADE IN JAPAN\" \u2013 a mark of trust and reliability<\/h3>\n\n\n\n
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By integrating the extensive knowledge and specialized expertise that Hero Electric has cultivated over more than half a century into every aspect of the design phase\u2014and manufacturing exclusively at domestic facilities under innovative technologies and a rigorous, comprehensive quality control system\u2014we achieve exceptionally high precision and reliability in the products themselves.<\/p>\n<\/div>\n\n\n\n

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To meet the supreme mission of achieving both \"quality\" and \"durability\" as professional-use products, all of our products are designed and developed entirely in-house.<\/p>\n<\/div>\n<\/div>\n\n\n\n

Uses Oxygen-Free Copper (OFC) with impurities removed to the utmost limit<\/h3>\n\n\n\n

For the first time in Japan's automotive aftermarket industry, we adopted Oxygen-Free Copper (OFC) as the core material for our battery terminal bodies. OFC is significantly purer and more conductive than standard copper, and is widely used in electronics and high-performance cables.<\/p>\n\n\n\n

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Oxygen-Free Copper (OFC) Main Body<\/figcaption><\/figure><\/div><\/div>\n<\/div>\n\n\n\n

Images are for illustration purposes.<\/em>
Not available for sale in bare (non-plated) form.<\/p>\n\n\n\n

What is Oxygen-Free Copper (OFC) ?<\/h4>\n\n\n\n
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Oxygen-Free Copper (JIS H 3100, C1020)<\/figcaption><\/figure>\n<\/div>\n\n\n\n
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High-purity copper with a purity of 99.96% or more<\/h5>\n\n\n\n

Oxygen-Free Copper is an exceptionally pure type of copper with minimal trace elements, impurities, and oxygen, resulting in a significantly higher purity compared to general copper.<\/p>\n\n\n\n

High Electrical Conductivity<\/h5>\n\n\n\n

Oxygen-Free Copper has excellent electrical conductivity and is widely used in electronics, wiring, and conductors. Its high conductivity allows efficient transmission of electrical signals.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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\u25a0Types, Grades, and Symbols of Materials Used in Oxygen-Free Copper (OFC) Battery Terminals<\/h5>\n\n\n\n
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Name<\/th>\n\t\t\tType<\/th>\n\t\t\tGradea)<\/sup><\/th>\n\t\t\tType Symbol<\/th>\n\t\t\tKey Features and Representative Applications (Reference Only)<\/th>\n\t\t<\/tr>\n\t\t
Alloy Number<\/th>\n\t\t\tForm<\/th>\n\t\t<\/tr>\n\t\t
Oxygen-Free Copper (OFC) <\/td>\n\t\t\tC1020<\/td>\n\t\t\tStrip<\/td>\n\t\t\tStandard Grade<\/td>\n\t\t\tC1020Rb)<\/sup><\/td>\n\t\t\tIt has excellent electrical and thermal conductivity, ductility, and drawability. It also offers good weldability, corrosion resistance, and weather resistance. Even when heated to high temperatures in a reducing atmosphere, it does not risk hydrogen embrittlement.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

(Reference): Japanese Industrial Standard JIS H 3100:2018 Copper and Copper Alloy Plates and Strips<\/p>\n\n\n\n

[Note]
b) For plates and strips used for electrical conduction, a \"C\" shall be added after the type symbols P, PS, R, or RS.<\/p>\n\n\n\n

\u25a0 Chemical Composition of Oxygen-Free Copper (Alloy Number: C1020)<\/h5>\n\n\n\n
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Alloy Number<\/th>\n\t\tChemical Composition (%)<\/th>\n\t
Cu<\/th>Pb<\/th>Fe<\/th>Sn<\/th>Zn<\/th>Al<\/th>Mn<\/th>Ni<\/th>P<\/th>Zr<\/th><\/tr>\n\t
C 1020<\/td>\"Minimum99.96%\"<\/td>\uff0d<\/td>\uff0d<\/td>\uff0d<\/td>\uff0d<\/td>\uff0d<\/td>\uff0d<\/td>\uff0d<\/td>\uff0d<\/td>\uff0d<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u25a0 Mechanical Properties of Materials Used in Oxygen-Free Copper (OFC) Battery Terminals<\/h5>\n\n\n\n
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Alloy Number<\/th>\n\t\tGrade<\/th>\n\t\tProduct Symbol<\/th>\n\t\t Tensile Test<\/th>\n\t\tBending test a)<\/sup><\/th>\n\t\tHardness test a)<\/sup>(for reference)<\/th>\n\t<\/tr>\n\t
Thickness<\/span> Rangemm<\/th>\n\t\tTensile Strengthb)<\/sup><\/span>N\/mm2<\/sup><\/th>\n\t\tElongationb)<\/sup><\/span>\uff05<\/th>\n\t\tThickness<\/span> Rangemm<\/th>\n\t\tBending Anglee)<\/sup><\/th>\n\t\tInner Radiuse)<\/sup><\/th>\n\t\tThickness<\/span> Rangemm<\/th>\n\t\tVickers Hardnessb)<\/span><\/sup>HV<\/th>\n\t<\/tr>\n\t
C1020<\/td>\n\t\t\u00bdH<\/td>\n\t\tC 1020P-\u00bdHd)<\/sup>C 1020PS-\u00bdHd)<\/sup><\/td>\n\t\t0.10~<0.15<\/td>\n\t\t235~315<\/td>\n\t\t-<\/td>\n\t\t0.10~2.0<\/td>\n\t\t180\u00b0<\/td>\n\t\t1xThickness<\/span><\/td>\n\t\t0.20~20<\/td>\n\t\t75~120e)<\/sup><\/td>\n\t<\/tr>\n\t
0.15~<0.30<\/td>\n\t\t\u226710<\/td>\n\t<\/tr>\n\t
0.30~20<\/td>\n\t\t245~315<\/td>\n\t\t\u226715<\/td>\n\t<\/tr>\n\t
C 1020R-\u00bdHd)<\/sup>C 1020RS-\u00bdHd)<\/sup><\/td>\n\t\t0.10~<0.15<\/td>\n\t\t235~315<\/td>\n\t\t-<\/td>\n\t\t\u22670.20<\/td>\n\t<\/tr>\n\t
0.15~<0.30<\/td>\n\t\t\u226710<\/td>\n\t<\/tr>\n\t
0.30~4.0<\/td>\n\t\t245~315<\/td>\n\t\t\u226715<\/td>\n\t\t\u22664.0<\/td>\n\t<\/tr>\n<\/table>\n<\/figure>\n\n\n\n

(Reference): Japanese Industrial Standard JIS H 3100:2018 Copper and Copper Alloy Plates and Strips<\/p>\n\n\n\n

[Notes]
a) Products that fall outside the specified thickness categories are not subject to bending or hardness tests.
b) Numerical values are rounded to the nearest whole number.
d) Also applicable to plates and strips used for electrical purposes.
e) Minimum test force is 1.961 N. <\/p>\n<\/div>\n<\/div>\n\n\n\n

[Reference] Comparative Table of Conductivity of Various Materials Commonly Used for Battery Terminals<\/h5>\n\n\n\n
Comparative Materials<\/th>\nOxygen-Free Copper (OFC)
(Material used in our products)<\/td>\n		Brass<\/td>\nZinc Alloy Die-Cast<\/td>\nLead<\/td><\/tr>\n
Material Conductivity (% IACS)<\/th>\n\t101%<\/td>\n\t28%<\/td>\n\t26%<\/td>\n\t9%<\/td><\/tr>\n<\/tbody><\/table><\/figure>\n\n\n\n

*1. IACS refers to the International Annealed Copper Standard, which defines 100% IACS as the conductivity of annealed standard copper.
*2. The above values are general reference values and not absolute (guaranteed) values.
(*Note) Cu-Zn alloys are referred to as brass; the academic term is \"\u9ec4\u9285\" (\u014dd\u014d).
\u3000\u3000\u3000\u3000\u3000(Reference): Osawa, Nao. \"Illustrated Introduction to the Basics and Mechanisms of Copper.\" Shuwa System, 2010, p.106.<\/p>\n\n\n\n

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[Point] Easy-to-understand conductivity explained with illustrations<\/h5>\n\n\n\n

Conductivity can be compared to \"road width,\" where smoother traffic flow represents higher efficiency.<\/p>\n\n\n\n

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Copper is a critical material for realizing a sustainable, decarbonized society through renewable energy and electric vehicles<\/h3>\n\n\n\n
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\u25a0Renewable Energy Generation
Copper plays a vital role in renewable energy systems. Solar and wind power equipment requires large amounts of copper wiring. Copper's high conductivity and durability enhance the efficiency and sustainability of renewable energy generation.<\/p>\n\n\n\n

\u25a0Electric Vehicles and Charging Infrastructure
Copper is an essential material in the production of electric vehicles. Motors, batteries, and charging infrastructure for electric vehicles require large amounts of copper. Its excellent conductivity and durability contribute to improved performance and efficiency in electric vehicles.<\/p>\n\n\n\n

\u25a0Electronic Devices
Copper is also essential in electronics manufacturing. Copper wiring is used in computers, smartphones, and TVs. Its excellent heat conduction makes it suitable for use in cooling systems. As high-performance electronics become increasingly important in a decarbonized society, copper plays a crucial role in supporting this demand.<\/p>\n\n\n

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To prevent oxidation of the copper itself, tin plating is applied to the surface<\/h3>\n\n\n\n

Since oxygen-free copper (OFC) tends to lose its excellent conductivity due to surface oxidation when left uncoated, a tin plating with low contact resistance and long-term stability is applied as the surface treatment.Tin plating is widely used in electrical components. By forming a coating layer, it shields the material from exposure to air, thereby protecting the base metal while ensuring both reliable conductivity and corrosion resistance.<\/p>\n\n\n\n

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Before tin plating<\/figcaption><\/figure><\/div><\/div>\n\n\n\n
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After tin plating<\/figcaption><\/figure><\/div><\/div>\n<\/div>\n\n\n\n

Developing products with a strong emphasis on unleashing maximum performance<\/h3>\n\n\n\n

To ensure the highest priority of achieving both reliability and robustness as battery terminals under the extremely harsh conditions of automotive engine compartments, we have established key specifications that include thickened materials and a slitless structure\u2014free from notches or cracks. From the design stage onward, our in-house product development integrates the technical expertise and know-how that Hero Electric has cultivated over the years.<\/p>\n\n\n\n

Development Concept<\/th>Background Behind the Development Concept<\/th><\/tr><\/thead>
Enhanced Durability through Thicker Base Material<\/td>
  1. Structural Reinforcement
    While copper is a relatively soft material, increasing its thickness enhances its strength, thereby improving both rigidity and durability.<\/li>\n
  2. Improved Electrical Conductivity
    While oxygen-free copper (OFC) already offers excellent electrical conductivity, increasing its volume through thicker material design further enhances the efficiency of electrical signal and power transmission.<\/li><\/ol><\/td><\/tr>
Slitless Structure<\/td>
  1. Enhanced Strength and Durability
    The absence of slits (cuts or cracks) improves the overall strength and durability of the product.<\/li>
  2. Reduced Risk of Product Damage
    The slitless structure minimizes the risk of cracks or fractures, helping to avoid issues like poor contact and voltage drops.<\/li><\/ol><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    Wall Thickness Evaluation of Oxygen-Free Copper (OFC) Battery Terminal (Conversion Type)<\/h4>\n\n\n\n
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    Products\/th>\n\t\t\t\tWall Thickness<\/th>\n\t\t\t<\/tr>\n\t\t<\/thead>\n\t\t
    Conversion Type<\/td>\n\t\t\t\tDXL SET \/ DXL PEAR SET Series<\/td>\n\t\t\t\t1.8 mm<\/td>\n\t\t\t<\/tr>\n\t\t\t
    DXS SET \/ DXS PEAR SET Series<\/td>\n\t\t\t\t1.5 mm<\/td>\n\t\t\t<\/tr>\n\t\t<\/tbody>\n\t<\/table>\n<\/figure>\n\n\n\n

    (Dimensional tolerance: \u00b10.1 mm \/ \u00b10.039 in)<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n

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    [Reference] Validation Based on Real-World Use Cases of Slit-Type Battery Terminals<\/h5>\n\n\n\n
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    Slits (cuts or cracks) can weaken the strength of objects or structures. When external force or load is applied to the slit, that area may become a point of weakness, increasing the likelihood of cracking or breakage.<\/p>\n\n\n\n

    Furthermore, Slit-type battery terminals that develop cracks due to vibrations from automobiles may cause unexpected vehicle issues, as increased contact resistance or poor connections can lead to voltage drops.<\/p><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n

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    Verified by \"Vibration Test\" Based on JIS Standards (Test materials: DTPL and DTPS)<\/h3>\n\n\n\n
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    [Overview of Vibration Testing Equipment]<\/p>\n\n\n\n

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