IEC 60352-4:2020

Overview

IEC 60352-4:2020 is an international standard published by the International Electrotechnical Commission (IEC) that addresses solderless, non-accessible insulation displacement (ID) connections. This standard specifies the general requirements, test methods, and practical guidance essential for the reliable design and evaluation of non-accessible ID connections used in electrical and electronic equipment. Applicable to wires with solid round conductors from 0.25 mm to 3.6 mm nominal diameter and stranded conductors from 0.05 mm² to 10 mm² cross-sectional area, IEC 60352-4:2020 ensures electrically stable connections under predefined mechanical, electrical, and environmental conditions.

This edition represents a technical revision over the original 1994 version and includes reorganized annexes and improved clarity in figures, reflecting advances and accumulated industrial experience.

Key Topics

• Scope and Applicability: Clear definition of the types and sizes of conductors suitable for non-accessible ID connections covered by this standard, emphasizing stable electrical performance without soldering.

• Materials and Dimensions: Guidelines on materials, surface finishes, and dimensional features for ID terminations and conductors, essential for ensuring connection reliability.

• Test Methods: Comprehensive procedures for mechanical tests (bending, vibration, repeated connection cycles), electrical tests (contact resistance, electrical load, temperature effects), and climatic/environmental assessments (temperature cycling, corrosion, humidity).

• Prerequisites for Testing: Criteria for workmanship, design parameters, and proper selection of wires and termination materials prior to performing standard tests.

• Test Schedules: Basic and full test schedules offer a structured approach to evaluate products either for general compliance or thorough validation.

• Practical Guidance: Informative annexes provide detailed recommendations on tooling, connection designs, wire characteristics, and application examples to support manufacturers and engineers.

Applications

IEC 60352-4:2020 applies primarily to the design, manufacture, and quality assessment of solderless ID connections that are not accessible after assembly, used widely in:

• Electrical devices and electronic equipment requiring compact, reliable wiring connections without soldering.
• Multi-pole connectors and wiring harnesses in automotive, aerospace, and industrial electronics where long-term electrical stability under mechanical stress and harsh environments is critical.
• Consumer electronics and household appliances utilizing ID connections for enhanced production efficiency and reliability.
• Environments demanding maintenance-free and durable electrical connections resistant to vibration, temperature variations, and corrosion.

The standard facilitates product testing and comparison across different tool designs and manufacturing sources, supporting consistent quality in assembled components.

Related Standards

When implementing IEC 60352-4:2020, consider complementing standards and references that address broader aspects of solderless connections and cable terminations:

• IEC 60352-1 - Solderless connections – Part 1: General requirements and tests for electric connections.
• IEC 60352-2 - Solderless connections – Part 2: Crimped connections.
• IEC 60352-3 - Solderless connections – Part 3: Press-in connections.
• IEC 61189 series - Testing methods for electronic components and interconnections.
• Industry-specific standards for wiring and connectors related to automotive, aerospace, and telecommunications.

These related standards help organizations integrate quality electrical connection solutions across diverse product lines, ensuring compliance with comprehensive international safety and performance criteria.

Keywords: IEC 60352-4, insulation displacement connections, solderless connections, non-accessible ID connections, electrical connector standards, mechanical testing, electrical testing, climatic testing, wire terminations, electrical connection reliability, IEC standards.