Custom Low-Temperature Outdoor Working Condition Connector Shell Material Selection Comparison

In low-temperature outdoor scenarios like polar energy storage stations, outdoor charging piles, and cold-region electric vehicle applications, the shell material of high-current anti-spark connectors directly dictates product lifespan and operational safety. Engineers often struggle with material selection here—ordinary materials become brittle, crack easily, and lose corrosion resistance at low temperatures, triggering connector failure and even safety hazards. This article compares shell material options for QS Antispark connectors in custom low-temperature outdoor conditions to guide optimal choices.

Problems Caused by Unsuitable Shell Materials in Low Temperatures

At temperatures below -20℃, material properties deteriorate drastically. First, brittleness surges, making shells prone to cracking under impact or vibration, damaging internal conductive structures. Second, poor low-temperature resistance impairs sealing; deformation lets water vapor and dust infiltrate, causing short circuits and terminal corrosion. Third, altered thermal expansion coefficients loosen shell-internal component connections, raising contact resistance and causing abnormal temperature rise.

QS Antispark Connector Shell Material Comparison (Low-Temperature Scenarios)

Youwei Technology optimized QS Antispark connector shells for low temperatures, testing modified nylon and modified PBT at -40℃ to evaluate impact resistance, corrosion resistance, dimensional stability, and sealing.

1. Low-temperature impact resistance: The modified nylon shell withstands 50 impacts at -40℃ without cracking (impact strength: 15kJ/m²); ordinary PBT cracks after 15 impacts (impact strength: 8kJ/m²). Toughening agents in modified nylon boost low-temperature toughness, preventing impact damage.
2. Corrosion resistance: After 500 hours of salt spray testing (low-temperature, high-humidity conditions), modified nylon scores grade 9 (ISO) with no corrosion; modified PBT scores grade 7 with minor surface corrosion. Anti-corrosion additives in modified nylon adapt to harsh outdoor, high-salt, high-humidity environments.
3. Dimensional stability & sealing: After 24 hours at -40℃, modified nylon has a dimensional change rate of 0.02% with tight sealing; modified PBT has a 0.08% change rate with slight sealing gaps (risk of water vapor infiltration). Modified nylon’s low thermal expansion coefficient ensures structural and sealing stability in cold.

Conclusion & Customization Tips

Modified nylon shells for QS Antispark connectors outperform PBT in low-temperature impact resistance, corrosion resistance, and dimensional stability, solving core low-temperature shell issues. For scenarios below -50℃, Youwei Technology offers custom material solutions with enhanced low-temperature additives.If you have any request please contact with my tech team http://www.youweic.com