Enameled wire
（I）Product Overview
Enameled wire is the core conductive winding material of transformers, composed of high-purity metal core and insulating enamel layer, formed by wire drawing, enamel coating and baking, with excellent conductivity, insulation and mechanical properties, suitable for various transformer windings.
（II）Core Materials and Classification
1. Core Wire Material
The mainstream is electrolytic pure copper (first choice); pure aluminum or copper-clad aluminum core wires are available for lightweight scenarios, balancing performance and cost.
2. Common Classification (by Insulation Performance)
(1) QA Polyurethane: Easy to solder, excellent high-frequency performance, suitable for low-voltage windings of small transformers; (2) QZ Polyester: Heat and oil resistant, suitable for medium and high-voltage windings of oil-immersed transformers; (3) QY Polyesterimide: Heat resistance 180℃, suitable for high-power power transformers; (4) QF Polyimide: Temperature resistance ≥220℃, suitable for special high-temperature transformers.
（III）Key Technical Parameters
Core diameter 0.05-12.0mm (customizable); heat resistance grade Class B/F/H/C; breakdown voltage ≥1.5kV (thin enamel), ≥3.0kV (thick enamel); copper core conductivity ≥58MS/m, aluminum core ≥37MS/m; strong enamel adhesion, suitable for winding process.
（IV）Product Advantages and Applications
Advantages: Low conductive loss, stable insulation, strong mechanical toughness, oil and aging resistance; applications cover power, electronics, new energy and other fields, suitable for various distribution, power and new energy transformers.
