SIST EN 60317-20:2014/A1:2019

Overview

SIST EN 60317-20:2014/A1:2019 sets out the requirements for solderable polyurethane enamelled round copper wire, class 155. This European and international standard is applicable to winding wires with a polyurethane enamel coating, intended for use where both solderability and stable thermal performance are required. The standard applies to both Grade 1 and Grade 2 wires, covering nominal conductor diameters:

• Grade 1: 0.018 mm to 0.800 mm
• Grade 2: 0.020 mm to 0.800 mm

The polyurethane resin may be chemically modified, provided it retains its original properties and complies with all defined wire requirements. This standard is identical with EN 60317-20:2014/A1:2019 and aligns with IEC 60317-20:2013/A1:2019, ensuring consistency across international applications.

Key Topics

• Wire Types and Classes: Defines the specifications for solderable polyurethane enamelled round copper wires, class 155, distinguishing between Grade 1 and Grade 2 by diameter and insulation performance.
• Material Requirements: Specifies the use of copper conductors coated with polyurethane-based enamel, including provisions for modified resins that maintain the enamel’s chemical identity.
• Thermal Class: Class 155 denotes a wire insulation system suitable for continuous operation at temperatures up to 155°C.
• Solderability: Outlines testing methods to ensure wire surfaces are smooth, free from enamel residue, and can be consistently soldered. Immersion times and solder bath temperatures are standardized.
• Product Consistency: Ensures that the enamelled wire meets rigorous quality control standards suitable for electrotechnical applications.

Applications

SIST EN 60317-20:2014/A1:2019 is widely used in the manufacturing and repair of electrical equipment, specifically where reliable winding wire characteristics are critical. Common applications include:

• Transformers: Ensures insulation reliability and electrical efficiency.
• Electric Motors: Supports windings operating at elevated temperatures, requiring solderable connections.
• Relays and Coils: Facilitates easy soldering during assembly and maintenance.
• Consumer Electronics: Used in small appliances, power tools, and audio devices where fine, consistent windings are essential.

This standard’s solderable polyurethane enamel increases production efficiency and reliability, supporting use in automotive, industrial, and consumer electronics sectors.

Related Standards

For comprehensive product compliance and compatibility, consider these related standards:

• IEC 60317-0-1: General requirements for enamelled round copper winding wires, including nominal diameter specification.
• IEC 60317-19: Specifications for solderable polyurethane enamelled copper wires of other temperature classes or with different modifications.
• EN 60317 Series: Full series addressing different base coatings, wire forms, and temperature classes.
• IEC 60851: Test methods for winding wires, including assessments of electrical, thermal, and mechanical properties.

By aligning with SIST EN 60317-20:2014/A1:2019 and its related standards, manufacturers and users of winding wires ensure safety, quality, and interoperability in electrotechnical products across global markets.

Keywords: solderable polyurethane enamelled copper wire, class 155 winding wire, IEC 60317-20, electrotechnical standards, winding wire requirements, solderability, enamelled wire grade 1, enamelled wire grade 2, thermal class 155, polyurethane resin, wire insulation standard.