The standard of low-voltage automobile wire varies in different countries and regions, mainly because of the different background of the automobile industry, climatic conditions and user needs. Below is a detailed overview of the GB, Japanese, German and American standard cables and their characteristics, as well as the main differences between them:

A low voltage automotive wire four series of standards

1. GB Cable (GB/T 8139)

Reference standard: GB/T 8139 is the Chinese national standard, covering the design, manufacturing and testing specifications of low-voltage automotive wires.

GB Cable Features:

Weather resistance: Taking into account China's vast area and diverse climate, the GB cable has strict requirements in high temperature resistance, low temperature resistance, humidity and heat resistance. Especially in the cold environment in the north and the hot and humid environment in the south, the cable needs to have good anti-aging and anti-ultraviolet performance.

Materials: GB standard cables mostly use polyvinyl chloride (PVC), cross-linked polyethylene (XLPE) and other materials, these materials in chemical corrosion resistance, wear resistance, insulation performance and other aspects of excellent.

Application: GB standard cable is widely used in domestic production of automobiles, covering a variety of needs from economic vehicles to high-end models.

2.  Japanese standard cable (JASO D608, D609, D611)

Reference Standards: JASO (Japanese Automotive Standards Organization) D608, D609, D611 standards.

Japanese standard cable Features:

Flexibility: Japanese standard cables are usually required to have better flexibility to adapt to the wiring needs of compact vehicles, especially in narrow Spaces inside the car.

Heat resistance: The summer temperature in Japan is high, so the Japanese standard cable usually has higher requirements on heat resistance, and the typical operating temperature range is -40°C to 125°C.

Lightweight: In order to improve fuel efficiency, Japanese standard cable often use lighter materials, such as special thermoplastic elastomers (TPE) to reduce vehicle weight.

Environmental protection: Japan has strict environmental protection requirements, and Japanese standard cables pay more attention to environmental protection and recyclability in material selection, reducing the use of harmful substances, such as lead, halogen and so on.

3. Germany Standard Cable (ISO 6722)

Reference standard: ISO 6722 is the International Organization for Standardization standard for automotive wires, which is widely used in Europe, especially in Germany.

Germany Standard Cable Features:

High temperature performance: Germany Standard Cables are highly demanding in terms of high temperature resistance and oxidation resistance, with typical operating temperatures ranging from -40°C to 150°C, suitable for high performance engines and harsh environment applications.

Mechanical strength: Wires specified in the ISO 6722 standard need to have a high mechanical strength to prevent wear and fracture caused by vibration and friction during prolonged use of the vehicle.

Flame retardant: Germany Standard cables need to meet strict flame retardant requirements to ensure that they will not accelerate the spread of fire in the case of fire.

Long-term reliability: The German automotive industry is known for precision manufacturing, so the Germany standard cable has a very high standard in durability and stability, suitable for highly demanding automotive electronic systems.

4. American standard cable (SAE J1128, SAE J1678, US-CAR-21)

Reference standards: J1128, J1678 of the Society of Automotive Engineers (SAE), and US-CAR-21 standards.

American Standard cable Features:

Variety: American Standard cables cover a wide range of applications from economy to high performance vehicles, and the applicable temperature range and electrical performance requirements vary by vehicle model, and the flexibility is high.

Extreme environment resistance: The geographic and climatic conditions of the United States are diverse, and American standard cables need to maintain good performance in extreme temperature, humidity and chemical corrosion environments. Its operating temperature range is generally -40°C to 105°C.

Resistance to mechanical damage: American standard cables tend to use thicker sheath materials and stronger tensile resistance designs to cope with mechanical damage in extreme environments, such as those common in off-road vehicles or commercial vehicles.

Standard flexibility: American standards are generally more flexible, allowing manufacturers to adjust the design of cables according to different models and use environments, with higher market adaptability.

The difference between different standards

1- Application region and market

GB standard: Mainly used in the Chinese market, adapt to China's climate and environmental characteristics.

Japanese standard: Used in Japan and other Asian markets, the design takes into account compact cars and high humidity environments.

German standard: widely used in the European market, especially German cars, suitable for high-demand, high-precision automotive systems.

American standard: Widely used in the North American market, emphasizing the diversity of cables and adaptability under extreme conditions.

2- Performance requirements

Temperature range: Different standards have different temperature requirements for wires, German standards generally require tolerance to higher temperatures, while American standards are more concerned about performance under extreme low and high temperature conditions.

Mechanical properties: German and American standards have higher requirements for mechanical damage resistance and tensile strength, while Japanese standards pay more attention to the flexibility and lightweight of the cable.

3- Test method

GB standard: usually includes high temperature aging, low temperature bending, oil resistance, acid and alkali resistance and other tests, the test method is relatively comprehensive.

Japanese standard: has unique requirements for testing flexibility and durability, such as testing at small bending radii.

German Standard: Emphasizes aging test and flame retardant test in high temperature environment, more stringent test method.

Us Standard: A wide range of tests, especially for durability and mechanical damage in extreme environments.

4- Suitable vehicle type

GB standard: Suitable for all kinds of domestic models, from passenger cars to commercial vehicles.

Japanese standard: mainly used in Japanese brands of compact vehicles and small and medium-sized passenger cars.

German standard: widely used in high-end German brands, such as BMW, Mercedes-Benz, Audi, etc., requiring precision and high reliability.

American standard: Suitable for American vehicles, especially large SUVs, trucks and off-road vehicles, to adapt to a variety of complex terrain and climate conditions.

These standards not only reflect the characteristics of the automotive industry in each country, but also profoundly influence the product design and production processes in their respective markets. Choosing the right cable standard is critical to ensuring the performance, safety and durability of your vehicle.