Product Description

Eureka Enameled Wire (0.516mm, 180°C Class)

Product Overview

Standard Designations & Core Material Foundation

• Alloy Grade: Eureka (CuNi40; equivalent to UNS C18400, DIN 2.0872)
• Key Specification: 0.516mm bare diameter (tolerance: ±0.003mm)
• Insulation Class: 180°C (Polyesterimide or Polyamide-imide enamel coating)
• Chemical Composition: Cu: 59-61%; Ni: 39-41%; trace impurities ≤0.5%
• Compliant Standards: IEC 60317, NEMA MW 1000, GB/T 6109
• Manufacturer: Huona New Material, certified to ISO 9001 and IATF 16949

Key Core Advantages (Centered on 0.516mm & 180°C Performance)

1. Ultra-Stable Electrical Performance

• High & Stable Resistivity: Exhibits a resistivity of 0.49 μΩ·m (20°C), which is significantly higher than pure copper, allowing for compact resistor designs.
• Ultra-Low TCR: The temperature coefficient of resistance is as low as ±40 ppm/°C (0-100°C), ensuring minimal resistance drift (≤0.004%/°C) even under fluctuating temperatures. This stability is critical for precision current sensing and voltage regulation.

2. Superior 180°C Thermal Endurance

• Continuous High-Temperature Operation: The enamel insulation is rated for continuous use at 180°C, with a short-term overload capability up to 200°C.
• Thermal Shock Resistance: The enamel coating maintains adhesion and dielectric strength even after 10,000 hours of aging at 180°C, far exceeding the performance of standard 155°C class wires.

3. Optimized 0.516mm Mechanical & Process Properties

• Balanced Strength & Flexibility: The 0.516mm diameter provides a tensile strength of ≥550 MPa (hard drawn) while maintaining sufficient ductility for winding on small mandrels (minimum bending radius ≥2× diameter).
• Excellent Solderability: The enamel layer is designed for easy stripping or direct soldering (depending on coating type), facilitating high-speed automated assembly in resistor manufacturing.

Technical Specifications

Product Specifications

Typical Application Scenarios

• Precision Resistors: Used in high-precision wirewound resistors and potentiometers where stability is paramount.
• Current Shunts: Ideal for high-current measurement shunts in battery management systems (BMS) and power inverters.
• Automotive Electronics: Heating elements for seat warmers, defrosters, and engine sensors due to its corrosion resistance and thermal stability.
• Aerospace & Defense: Critical resistance components in avionics and radar systems requiring reliability under extreme conditions.