Solderable Polyurethane Enamelled Round Copper Wire, Class 155

Solderable polyurethane enamelled round copper wire, classified as Class 155. It is a specialized type of wire used in various electrical and electronic applications. This type of wire is characterized by its polyurethane insulation and its ability to withstand high temperatures up to 155°C.
The most outstanding characteristics of the wire is the possibilty of efficient and safe contacting of the wire ends by quick and exact soldering. No mechanical removal of the insulation film is required beforehand. Therefore, the manufacturing process is efficient and convenient.
Class 155 is a thermal class that requires a minimum temperature index of 155 and a heat shock temperature of at least 175℃. The temperature in degrees Celsius corresponding to the temperature index is not necessarily. It is recommended that the wire be operated and this will depend on many factors, including the type of equipment involved.

Specifications – IEC 60317-20-2013 Standard
Reference standard IEC 60317-20-2013 the requirements for solderable polyurethane enamelled round copper wire, class 155. The IEC 60317-20-2013 standard includes detailed testing methods to verify the wire’s compliance with the specified requirements. These methods ensure that the wire’s dimensions, electrical, thermal, mechanical, solderability, and chemical properties meet the necessary standards.
This part of lEC 60317 specifies the requirements of solderable enamelled round copper winding wire of class 155 with a sole coating based on polyurethane resin, which may be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements.
NOTE A modified resin is a resin that has undergone a chemical change, or contains one or more additives to enhance certain performance or application characteristics.
The range of nominal conductor diameters covered by this standard is:
-Grade 1: 0,018 mm up to and including 0,800 mm;
-Grade 2: 0,020 mm up to and including 0,800 mm.
The nominal conductor diameters are specified in Clause 4 of lEC 60317-0-1:2013.

Thermal Endurance: The wire must maintain its properties at temperatures up to 155°C, ensuring long-term reliability in high-temperature environments.
Heat Shock: Clause 9 of lEC 60317-0-1:2013 applies. The minimum heat shock temperature shall be 175 ℃. Tests for the wire’s ability to with stand rapid temperature changes without cracking or losing insulation integrity.
Cut-through: No failure shall occur within 2 min at 200℃.
Breakdown Voltage: Minimum breakdown voltage levels are defined to ensure the wire can withstand high voltages without insulation failure.
Tolerance Levels: Specific tolerance levels are provided to maintain the consistency of wire dimensions, which is crucial for winding processes.

Solderability
The wire must be able to be soldered without prior removal of the insulation. The standard specifies the conditions under which the solderability is tested, including the temperature and duration of exposure.
Nominal conductor diameters up to and including 0,100 mm.
The temperature of the solder bath shall be (390 ± 5)℃. The maximum immersion time (in seconds) shall be the following multiple of the nominal conductor diameter (in millimetres) with a minimum of 2s.
The surface of the tinned wire shall be smooth and free from holes and enamel residues.

Resistance to abrasion (nominal conductor diameters from 0,250 mm up to and including 0,800 mm)
The wire shall meet the requirements given in Table 1.
For intermediate nominal conductor diameters, the value of the next larger nominal conductor diameter shall be taken.

Performance Features:
1.Efficiency in Manufacturing: The solderable nature of the polyurethane enamelled wire simplifies the manufacturing process by eliminating the need for enamel stripping.
2.Cost-Effective: Reduces labor costs and increases production speed due to its easy-to-solder characteristics.
3.Direct Solderability: The polyurethane enamel coating can be soldered directly, saving time and effort in the manufacturing process.
4.Electrical Insulation: Provides excellent insulation properties, ensuring safety and reliability in electrical applications.
5.Flexibility: The enamel coating offers good flexibility, making the wire suitable for complex winding and tight spaces. Good result in humidity – resistance performance and performance in high speed winding.
6.High thermal properties. Ideal for applications requiring F Level thermal endurance. For example industrial motors, coils, and automotive electronics.
7.Good resistance: Increases the longevity and reliability of components exposed to higher temperatures.

Solderable polyurethane enamelled round copper wire is a specialized type of magnet wire used in various electrical and electronic applications. Its unique properties make it ideal for situations where direct soldering without prior stripping is required. This type of wire is distinguished by its enamel insulation, which is made from polyurethane.
This type of enamelled copper wires fulfills the technical requirements of modern winding techniques. And it can be well impregnated and cast with compounds in accordance with the manufacturer’s instructions. The excellent thermal resistance characteristics offer protection when wire-wound coils have to be compound cast and when subject to short-time overloads. The chemical resistance to aggressive liquid and gaseous mediums is limited, and therefore we recommend that you carry out compatibility tests before using this enamelled copper wire.
Choosing the right heat resistance grade of solderable polyurethane enamelled round copper wire is essential for the performance and longevity of your electrical and electronic projects. Whether you need a general-purpose solution or a wire that can with stand extreme temperatures, we can meet your needs. Always consider the specific requirements of your application.