Polyurethane Enameled Copper Round Wire (UEW, 130/155/180 °C)

Thermal Class: 130/155/180 °C
Dimension: 0.04-2.50 mm; AWG 10-46
Application: relays, contactors, voice coils, small motors

get a quote

Estimated Delivery:Oct 31 - Nov 04

Technical Specifications

130 °C (Class B) / 155 °C (Class F) / 180 °C (Class H) 0.04 – 2.50 mm IEC 60317 / NEMA MW 1000 / GB/T 6109

Product Name	Polyurethane Enameled Copper Round Wire
Enamel Code	UEW polyurethane enamel (GB code QA)
Conductor	Electrolytic copper, Cu ≥ 99.95%
Diameter Range	0.04 – 2.50 mm
Thermal Class	130 °C (Class B) / 155 °C (Class F) / 180 °C (Class H)
Insulation Grade	Grade 1, Grade 2, Grade 3
Solderability	Direct solderable; soldering temperature typically 360 – 400 °C
Colour	Natural amber, red, blue, green; custom colours on request
Standards	IEC 60317, NEMA MW 1000, GB/T 6109, JIS C 3202
Compliance	RoHS, REACH
Packing	PT-25 spool, 30 kg per spool

Product Overview

Polyurethane enameled copper round wire, commonly designated UEW, is the standard choice wherever direct solderability is required. The polyurethane enamel film decomposes cleanly at soldering temperature, allowing termination without mechanical or chemical stripping. This makes UEW wire the preferred grade for high-speed automated winding and soldering lines.

Available from 0.04 to 2.50 mm in thermal classes 130, 155 and 180, it is used across coils, relays, transformers and small motors in consumer, industrial and automotive electronics.

Key Advantages

Dual manufacturing hubs in Changzhou and Foshan, China, covering both fine-gauge and heavy-gauge production.
Full production range from 0.04 mm to 2.50 mm, supporting everything from micro-motors to large power equipment.
Monthly output of approximately 3,000 tons, with stable capacity for repeat and high-volume programmes.
ISO 9001 and ISO 14001 certified quality and environmental management systems.
RoHS and REACH compliant insulation systems for European and North American markets.
Wire manufactured in accordance with IEC, NEMA, GB and JIS international standards.
Direct solderability removes the stripping step and shortens the assembly cycle.
Ideal for high-speed automated winding and soldering equipment.
One of the broadest UEW diameter ranges available, from ultra-fine to heavy gauge.

Product Features

Direct solderability with clean, residue-free termination.
Excellent electrical properties and high breakdown voltage.
Good flexibility and adhesion for demanding winding operations.
Pinhole-resistant film with uniform thickness.
Optional self-bonding overcoat available for frameless coils.
Consistent quality suitable for automated production lines.

Typical Applications

Relays, contactors and small transformers.
Voice coils, speakers and vibration motors.
Instrument and sensor coils.
Small motors, fans and pump windings.
Automotive and consumer electronics coils requiring direct soldering.

Packing & Delivery

Spool Type	PT-25 – PT-270 plastic spool, or plywood spool for heavy-gauge and large-volume orders
Spool Weight	30 kg per spool (flat wire spools typically 30 – 150 kg)
Inner Packing	Moisture barrier wrap to protect the enamel film during transport
Outer Packing	Carton boxes on pallets, or plywood cases for sea freight
Customisation	Spool size, spool weight and pallet configuration can be tailored to your handling equipment

Quality Assurance & Certifications

Quality management system certified to ISO 9001; environmental management certified to ISO 14001.
Insulation systems compliant with RoHS and REACH directives for EU and North American supply chains.
Routine electrical and dimensional testing on every production batch before release.
Traceability maintained from raw conductor lot through to finished spool.
Products manufactured to IEC, NEMA, GB and JIS dimensional and performance standards.

Enamel Type Reference

The enamel designations below are the international equivalents of the Chinese GB codes. All five enamel systems are available on copper, aluminium and copper-clad aluminium conductors, and can be combined with the insulation grades and thermal classes shown on this page.

GB Code	International Code	Enamel Type	Thermal Class / Feature
QA	UEW	Polyurethane Enameled Wire	Direct solderable; 130 / 155 / 180 °C
QZ	PEW	Polyester Enameled Wire	130 / 155 °C
QZY	EIW	Polyesterimide Enameled Wire	180 °C
QXY	AIW	Polyamide-Imide Enameled Wire	200 / 220 / 240 °C
Q(ZY/XY)	EI/AIW (PEI/PAI)	Polyesterimide / Polyamide-Imide Composite	200 °C

Overseas customers normally work with the international codes (UEW, PEW, EIW, AIW). When specifying a grade, please state the international code together with the required thermal class, for example UEW 155 °C or EI/AIW 200 °C.

FAQ

What soldering temperature is recommended?

Direct soldering of UEW wire is normally carried out between 360 and 400 °C. The enamel decomposes at the termination point and leaves a clean solderable surface. We can advise on the optimum setting for your equipment and wire diameter.

How does UEW compare with PEW and EIW?

UEW offers the best solderability at the lowest thermal class. PEW and EIW provide higher thermal classes and better chemical resistance but require stripping before soldering. The right choice depends on your termination process and operating temperature.

Can you produce custom diameters, colours and thermal classes?

Yes. As a manufacturer operating two production bases, we can customise conductor diameter, enamel build, colour and thermal class to match your drawing or reference sample. Send us your specification and we will confirm feasibility and tooling lead time.

Do you provide samples for evaluation?

Yes. Standard specifications can be supplied as free samples for qualification testing; freight is normally arranged on a collect basis. Customised specifications may require a small sample charge, which is credited against your first bulk order.

What is the typical lead time?

Standard specifications are typically dispatched within 7 to 15 working days after order confirmation. Lead time for customised or high-volume orders is confirmed at the quotation stage.

How is the wire packed for export?

Wire is wound on plastic or plywood spools, individually wrapped to prevent moisture and mechanical damage, then packed in carton boxes on pallets or in plywood cases. Packing is suitable for both sea and air freight, and customised spool sizes and pallet configurations are available.

What documentation is supplied with each shipment?

Each shipment is accompanied by a packing list, commercial invoice and certificate of origin where applicable. Inspection and test reports covering conductor diameter, enamel thickness, elongation, flexibility and breakdown voltage can be provided on request.

Request a Quotation

Need Pricing or a Technical Datasheet?

Send us your conductor size, thermal class and quantity requirement. Our engineers will confirm the correct grade and enamel build, and issue a formal quotation within one working day.

Send Inquiry

Polyurethane Enameled Copper Round Wire (UEW, 130/155/180 °C)

Thermal Class: 130/155/180 °C
Dimension: 0.04-2.50 mm; AWG 10-46
Application: relays, contactors, voice coils, small motors

get a quote

Technical Specifications

Product Overview

Key Advantages

Product Features

Typical Applications

Packing & Delivery

Quality Assurance & Certifications

Enamel Type Reference

FAQ

Need Pricing or a Technical Datasheet?

Can I customize the packaging?

Collapsible tab heading?

How can I get a quotation?

Can I get a sample first? How long does it take?

You Might Also Like

Polyester Enameled Copper Round Wire (PEW, 130/155 °C)

Self-Bonding Enameled Copper Round Wire (130/155/180/200 °C)

Polyester-imide /Polyamide-Imide Enameled Copper Round Wire (PEI/PAI, 200/240 °C)

Polyamide-Imide Enameled Copper Round Wire (AIW,220 °C)