With the development of electric and electronic industry, self-solderable polyurethane enameled copper wire (2UEW/180) has been an important materials for high efficiency coil manufacturing. It is with good solderability, outstanding insulation, stable thermal resistance and the other features, suitable for all kinds of precision winding, such as motors, relays, transformers or sensors, etc.
What Is 2UEW/180 Enameled Copper Wire?
2UEW/180 is a Class 180 degreesC polyurethane enameled copper wire with self-solderable insulation coating. Being a self-solderable wire, it does not need to adhere mechanically the bare conductors, like conventional enameled wires, but instead, the insulation coating is removed directly by the hot soldering iron.
Key Identification:
- Type: 2UEW – Polyurethane (Self-solderable)
- Thermal Class: 180°C
- Conductor: 99.99% oxygen-free copper (OFC)
- Standards: IEC 60317-20 / JIS C3202 / NEMA MW-79-C (or equivalent)
Structural Composition
A high-quality 2UEW/180 wire consists of the following layers:
| Layer | Description | Function |
| Conductor | Oxygen-free copper | Excellent electrical conductivity |
| Primary enamel layer | Polyuretdane resin | Provides base insulation |
| Topcoat (optional) | Polyamide overcoat | Enhances mechanical & chemical resistance |
The polyurethane enamel ensures both thermal endurance and solderability, making it a versatile choice for automated production lines.
Main Properties & Technical Advantages
Self-solderability
Most notable feature -the insulation layer melts and vaporizes immediately at 375–420 degrees C thus enabling direct soldering without any chemical stripping or mechanical abrasion.
Excellent Thermal Resistance
Class 180 degreesC, 2UEW/180 is rated for continuous operation at high temperature, for use in high-density winding configurations and downsized electronic equipment.
Superior Electrical Performance
High breakdown voltage
Low dielectric loss
According to the literature118129130, No current flows across a capacitor in the absence of magnetic coupling. At low frequencies, when magnetic coupling is less than dramatic, the current faces the full capacitance, and the power dissipated across it depends on the dielectric loss. Dielectric loss determines the extent of the full current which is conducted across the dielectric. Therefore, the lower the loss tangent, the more conducting is the dielectric.
Work temperature and humidity tolerance conditions. Same as mentioned insulation resistance test. Constant humidity and heat.
Smooth Surface & Easy Winding
Enamel is even, well lubricated, resulting in a constant tension (no jumps), less wire breakage and outstanding coil formability on high speed winding.
Chemical & Solvent Resistance
Resist alcohol, fyron and standard motor varnishes–allowing for adaptation to various impregnation systems.
Technical Specifications (Typical Values)
| Property | Test Standard | Typical Value |
| tdermal Class | IEC 60317-20 | 180°C |
| Soldering Temperature | IEC 60851-6 | 375–420°C / 2–5 sec |
| Breakdown Voltage | IEC 60851-5 | > 7.0 kV (AWG 32) |
| Elongation | IEC 60851-3 | ≥ 20% |
| Adhesion (Peel Test) | IEC 60851-3 | Pass (no cracking) |
| Dielectric Loss | IEC 60247 | Low |
| Conductor Material | ASTM B33 | OFC Copper ≥99.99% |
Applications of 2UEW/180 Enameled Copper Wire
Because of its unique solderable insulation and excellent heat endurance, 2UEW/180 is widely used in:
Micro-motors and small transformers
Compact coil designs benefit from easy soldering and consistent winding.
Relays, coils, and solenoids
Simplifies mass soldering without stripping.
Sensors and precision instruments
Stable insulation for delicate signal transmission.
Telecommunication equipment
Ensures reliable connectivity with reduced production time.
Therefore, 2UEW/180 offers the best balance between solderability and high thermal performance.
Comparison with Other Enamel Types
| Type | tdermal Class | Solderable | Main Features |
| UEW/130 | 130°C | Yes | Basic self-solderable, limited temperature range |
| UEW/155 | 155°C | Yes | Moderate heat resistance |
| 2UEW/180 | 180°C | Yes | Excellent tdermal stability + solderability |
| AIW (Polyamide-imide) | 200°C | No | Superior chemical/abrasion resistance, but non-solderable |
Please do not expose for a considerable time to the UV or allow it to get into contact with water. Room temperature should be (10–35 degreeC)and humidity should not be more than 75%.
Use soft winding tension. To prevent cracking of the enamel.
Proper flux control shall be used in order to have a clean joint and welding obtained during the soldering process.
Why Choose LP Industry for 2UEW/180 Wires
Zhengzhou LP Industry Co., Ltd. is produced with over 15 years of experience in the production of enameled copper and aluminum electric wire and cable-producing enterprises.
We provide:
Precise control of size from AWG 10 (2.58 mm, 436) to AWG 46 (0.137 mm, 127).
Universal flat or round wire design.
Customizable soldering temperature and enamel thickness
ConcrudQins, adheres to the following standards: IEC, JIS and NEMA.
Our batch is rigorously tested for solderability, thermal shock, breakdown voltage and adhesion, which guarantees consistent experience even for extremely demanding applications.
Conclusion
2UEW/180 self-solderable polyurethane enameled copper wire is an ideal blend of high performance, production friendly and simple to process.
Knows for being able to kill pre-solder stripping, keep stable insulation at 180 degreesC, and solve the coil formation efficiently, combined with suitable properties, has emerged as state of the art for industry today, especially for electronic and electromechanical manufacturing.
If you are designing anything from precision relays to micro-transformers or automotive coils 2UEW/180 will enable you to improve productivity, reliability and performance over time.