Automotive Low-Voltage Wire Compound

The EPC9007 / EPC9257 / EPC9507 series is an irradiation-crosslinked, halogen-free automotive wire material platform developed for low-voltage in-vehicle wiring. The three grades share the same application route while providing clear temperature-class choices: EPC9007 for 100°C, EPC9257 for 125°C and EPC9507 for 150°C wire constructions.

The series is designed for automotive wire applications evaluated around JASO D611 and ISO 6722 requirements. Rather than treating the three grades as separate, highly repetitive products, this page allows cable manufacturers to select the appropriate material primarily by required temperature class, then compare mechanical, thermal, electrical and fluid-resistance data.

• Three temperature classes in one low-voltage automotive wire material platform: 100°C, 125°C and 150°C
• Designed around JASO D611 and ISO 6722 automotive wire requirements
• Irradiation cross-linking after extrusion; recommended dose 10–12 MRad
• Halogen content reported as 0 ppm for all three grades
• All three grades pass -40°C low-temperature winding in the supplied data
• Automotive fluid-resistance data include gasoline, diesel, engine oil, power-steering fluid and gear oil exposure
• Temperature-based selection reduces overlap and makes customer RFQs easier to qualify

• Low-voltage automotive primary wire
• Vehicle body wiring harnesses
• Instrument-panel and interior wiring
• Lighting and signal circuits
• Electrical and electronic control wiring
• Automotive auxiliary circuits
• Other in-vehicle low-voltage wire constructions requiring JASO D611 / ISO 6722-oriented performance

EPC9007, EPC9257 and EPC9507 are positioned for low-voltage automotive wire. They should be kept separate from the EV high-voltage cable family, where materials such as EPC9508 and other dedicated EV high-voltage grades are selected according to different cable constructions and requirements.

• All three grades can be processed on conventional PVC/PE cable extrusion equipment.
• Recommended electron-beam irradiation dose: 10–12 MRad.
• Control melt temperature below approximately 165°C and do not exceed 175°C.
• A low-compression screw and head are recommended, with a compression ratio of approximately 1:1–1:2.
• Optimize extrusion temperature, line speed, insulation thickness and irradiation dose according to the actual conductor and finished-wire construction.
• Final JASO D611 / ISO 6722 compliance must be validated on the complete finished automotive wire.

• With intact sealed packaging, special drying is normally not required.
• After extended storage in a humid environment, dry at approximately 70°C for 4 hours in a dehumidifying dryer.
• Natural-color compounds can be colored; matching color masterbatch solutions can be supplied.
• Final material suitability should be evaluated on the customer's actual finished-wire construction.

The supplied product catalogue states that EPC9007, EPC9257 and EPC9507 meet the JASO D611 and ISO 6722 application route and are used for environmentally friendly low-voltage in-vehicle wiring. The listed mechanical properties are measured after irradiation.

Important Compliance Note

JASO D611 and ISO 6722 are finished-wire / automotive-wire requirements. Raw compound selection alone does not guarantee finished-wire compliance. Conductor construction, insulation thickness, extrusion quality, irradiation conditions and final wire testing must all be considered.

• Target finished-wire temperature class: 100°C, 125°C or 150°C
• Applicable standard / customer specification: JASO D611, ISO 6722 or OEM specification
• Conductor size and conductor construction
• Insulation thickness and finished wire OD
• Required mechanical and thermal-aging performance
• Required fluid / oil / chemical resistance
• Required low-temperature performance
• Extrusion equipment and line speed
• Electron-beam irradiation equipment / dose window
• Required color, trial quantity and estimated annual demand