Japanese Standard Flat Twin Wire

For applications requiring reliable, space-saving, and safe electrical connections, the Japanese Standard Flat Twin Wire represents a pinnacle of design and engineering. This specialized cable, adhering to stringent Japanese manufacturing standards (JIS C 3306), is engineered for durability and consistent performance in demanding environments. Its flat, parallel twin-core configuration is ideal for wiring within appliances, control panels, lighting fixtures, and internal machinery where a low-profile, flexible solution is paramount. A key variant within this category is the Japanese VFF Flat Twin Core Wire, known for its fine-stranded conductors offering superior flexibility. For scenarios demanding robust insulation, the Japanese VHF PVC Insulated Flat Cable provides enhanced protection. The standard offering, often referred to as PVC Insulated Japanese Flat Twin Wire, combines a polyvinyl chloride sheath with parallel conductors for general-purpose use. Collectively, these products exemplify the Japanese Style Double Core Flat Wire approach, prioritizing precision, safety (typically rated 300V), and efficient use of space.


The Japanese Standard Flat Twin Wire is characterized by a set of precise technical parameters that define its performance and suitability for specific applications. The construction typically involves two parallel tinned copper conductors, which provide excellent conductivity and corrosion resistance. These conductors are individually insulated with a high-grade PVC compound, color-coded (usually red and white or black and white) for easy polarity identification during installation. The insulated cores are then laid parallel and sheathed together in a final layer of durable PVC, forming the characteristic flat profile. This design ensures not only physical protection but also enhances heat dissipation. Key specifications include the conductor size (cross-sectional area), overall dimensions, electrical ratings, and temperature range. The following table and list detail the standard specifications for common models of this wire.

Key Product Specifications

  • Standard Compliance: Manufactured to JIS C 3306 standards.
  • Conductor: Tinned annealed copper, stranded for flexibility.
  • Insulation: High-quality Polyvinyl Chloride (PVC).
  • Sheath/Jacket: Tough, durable PVC outer sheath.
  • Voltage Rating: 300V.
  • Temperature Rating: -10°C to +60°C for general use.
  • Flame Retardancy: Compliant with standard flame-retardant requirements.
  • Core Identification: Insulation is color-coded for easy polarity distinction.
Model / Size (mm²) Conductor Structure (No./mm) Finished Outer Dimensions (Approx. mm) Max. DC Resistance at 20°C (Ω/km) Current Rating (A) *
0.5 sq mm 20/0.18 2.0 x 4.0 39.0 7
0.75 sq mm 30/0.18 2.2 x 4.4 26.0 12
1.25 sq mm 50/0.18 2.7 x 5.4 15.6 17
2.0 sq mm 37/0.26 3.2 x 6.4 9.74 23

* Current rating is indicative and can vary based on installation conditions and ambient temperature. Always consult relevant engineering guidelines for specific applications.

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