Dupont Nomex 410 and The 400 Series Electrical Insulation Paper

The Industry Standard for Electrical Insulation DuPont™ Nomex® 410 is a calendered insulating paper that offers a unique balance of properties. It has been used for decades in almost every known electrical insulation application. This aramid fiber-based material is famous for its ability to maintain its integrity at temperatures exceeding 220°C, providing a safety margin and reliability that synthetic substitutes cannot match. Available in 11 thicknesses ranging from 0.05 mm to 0.76 mm (2 mil to 30 mil).

Key Performance Benefits

• Exceptional Dielectric Strength: Provides superior electrical protection even in thin gauges, allowing for more compact equipment designs.

• Thermal Stability: UL-rated for continuous use at 220°C, with the ability to withstand significantly higher short-term temperature peaks.

• Mechanical Toughness: Highly resistant to tearing and abrasion, making it suitable for heavy-duty winding and automated insertion processes.

• Chemical Compatibility: Excellent resistance to most solvents and acids; fully compatible with all classes of insulating varnishes and adhesives.

Custom Fabrication & Die-Cutting We offer extensive converting capabilities for the Nomex® 400 series. Our facility provides precision slitting for custom-width rolls and advanced die-cutting for complex parts such as slot liners, washers, and spacers. By providing ready-to-use Nomex® components, we help you reduce production waste and ensure that your high-voltage motors and transformers meet the strictest quality standards.