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Polyurethane Series

QA (UEW) Enameled WireClass F & Class H Performance

Exceptional solderability, low dielectric loss, and easy pigmentation — engineered for modern electrical applications.

YIDA's Polyurethane Series delivers Class F 155°C and Class H 180°C temperature ratings, making it an industry leader in performance and durability. The polyurethane enamel enables direct soldering without stripping — a critical advantage for automated winding operations where production speed matters.

Available with optional Nylon overcoat (UEWN) for enhanced mechanical protection, the series covers diameters from 0.035mm to 1.6mm. Its low dielectric loss characteristics make it particularly suited for high-frequency transformers, sensor coils, and precision electronic components.

Broad Diameter Spectrum

Versatile range from 0.035mm to 1.6mm, covering fine-gauge windings to robust coils.

Unmatched Solderability

Solder-through capability eliminates stripping, reducing production time significantly.

Ease of Pigmentation

Formulated for easy coloring — meet aesthetic or wire coding requirements without compromise.

Low Dielectric Loss

Superior electrical performance with minimal energy loss, ideal for high-frequency circuits.

By connecting directly with our factory, customers get top-tier quality at competitive rates. With decades of manufacturing experience and rigorous quality control, YIDA delivers consistent product performance — backed by full IEC, GB/T, and NEMA compliance documentation.

YIDA Polyurethane enameled wire product range

YIDA Enameled Copper Wire Insulation Guide

Download Insulation Guide

Technical Specifications

Polyurethane Series Specifications

Available in 130°C, 155°C, and 180°C ratings with Nylon overcoat options.

Thermal ClassInsulation TypeYIDA Product CodeDiameter Range (mm)Diameter Range (AWG)IEC Standard (60317)GB/T (6109)NEMA Standard
130°CPolyurethane 130QA (UEW)0.035 – 1.6#14 – #4760317-196109.4MW75-C
155°CPolyurethane 155QA (UEW)0.035 – 1.6#14 – #4760317-206109.10MW79-C
155°CPolyurethane Nylon 155Q(A/X) (UEWN)0.035 – 1.6#14 – #4760317-216109.11MW80-C
180°CPolyurethane 180QA (UEW)0.035 – 1.6#14 – #4760317-516109.23MW82-C

Applications

Polyurethane enameled wire is widely used in high-frequency transformers, sensor coils, relay windings, telecommunications equipment, consumer electronics, and IoT devices. Its solder-through capability makes it the preferred choice for automated winding processes where stripping insulation would slow production. Also used in litz wire strand insulation for high-frequency power converters.

Frequently Asked Questions

Why is polyurethane enameled wire solderable without stripping?+
Polyurethane insulation thermally decomposes cleanly at soldering temperatures (around 370-400°C), allowing the solder to wet the copper conductor directly through the enamel. This eliminates the need for mechanical or chemical stripping before termination, significantly reducing production time in automated winding operations.
What is the difference between Class F (155°C) and Class H (180°C) UEW?+
Class F (155°C) polyurethane wire is the most common grade, suitable for the majority of electronic and electrical applications. Class H (180°C) uses a modified polyurethane resin that provides 25°C additional thermal headroom, making it better suited for applications with higher ambient temperatures or intermittent overload conditions. Both grades retain full solderability.
What is nylon overcoat and when should I use it?+
Nylon overcoat (UEWN) adds a thin polyamide layer over the polyurethane base coat. This improves abrasion resistance and mechanical durability during high-speed winding, making it ideal for applications involving tight slots or aggressive winding geometries. The nylon layer also improves resistance to solvents and varnishes used in impregnation processes, while still allowing solder-through termination.
What applications is polyurethane wire best suited for?+
Polyurethane enameled wire excels in applications requiring direct solderability, low dielectric loss, or easy pigmentation. Common uses include relay coils, small signal transformers, sensor windings, RFID antennas, hearing aid transducers, and high-frequency electronic components. Its low dielectric loss makes it particularly effective in RF and high-frequency circuits.
Can YIDA supply custom polyurethane wire specifications?+
Yes. YIDA can produce polyurethane enameled wire to custom specifications including non-standard diameters, specific insulation thickness tolerances, and color-coded enamel for wire identification. Our engineering team works directly with customers to match wire performance to application requirements. Contact us with your specifications for a tailored quote.

YIDA Wire has manufactured enameled copper wire since 1984. IATF 16949, ISO 9001, and UL certified. Trusted by industry leaders across 50+ countries. Contact us for specifications →