IEC 61076-4-102:1997

Overview

IEC 61076-4-102:1997 is an international standard published by the International Electrotechnical Commission (IEC) that specifies detail requirements for two-part single-pole printed board connectors. These connectors are designed for multiple use in plug-in units and are intended for direct current (d.c.), low-frequency analogue, and digital high-speed data applications. The standard emphasizes connectors featuring pre-centring, coding, and early mating functionalities, incorporating a metric grid system in line with IEC 60917.

Included in the IEC Quality Assessment System for Electronic Components (IECQ) as specification QC 480301XX0003, this publication provides a framework to ensure high-quality connector performance in sensitive and demanding electrical and electronic systems.

Key Topics

• Connector Structure and Types
  The standard addresses two-part single-pole connectors that support multiple engagements on printed circuit boards (PCBs). It covers both fixed and free board connector configurations, including detailed mechanical and dimensional information.

• Mounting and Assembly Guidelines
  Recommended methods for mounting connectors on PCBs are outlined to optimize performance and reliability. Detailed instructions on positioning, mounting, and securing ensure exact alignment and robust electrical contact.

• Pre-centring and Coding Mechanisms
  The connectors incorporate pre-centring features to facilitate correct alignment during mating, reducing risk of damage. Coding devices provide mechanical keying, preventing mismating by distinguishing connector types and functions.

• Early Mating Features
  To enhance connection reliability and operational safety, early mating designs ensure first contact occurs in controlled phases, minimizing signal disruption especially in high-speed digital applications.

• Dimensional and Mechanical Specifications
  Detailed dimensional data, including height, width, depth, and mating tolerances, guarantee compatibility across different manufacturers and design environments. This harmonization supports interoperability within electronic assemblies.

• Electrical and Mechanical Performance
  The standard specifies electrical ratings such as current limits and contact resistance, alongside mechanical characteristics including mechanical endurance, engagement/disengagement forces, vibration and shock resistance, and coding device robustness.

• Testing and Assessment Procedures
  A comprehensive test program validates connector quality, including climatic, electrical, mechanical endurance, and retention force tests, ensuring connectors meet stringent performance criteria in real-world conditions.

Applications

IEC 61076-4-102 connectors are extensively used in environments where reliable electrical connection and signal fidelity are critical, including:

• Industrial Automation Systems - for reliable transmission of analogue and digital signals in control units.
• Telecommunications Equipment - supporting high-speed data transfer with minimal signal loss.
• Measurement and Instrumentation - where precise low-frequency analogue signals require stable connections.
• Computing and Embedded Systems - enabling plug-in board units with secure mechanical and electrical interfaces.
• Medical Devices - ensuring robust and coded connections in sensitive medical electronic equipment.

These connectors are ideal where high-quality, mass-replicable, and coded connectors reduce errors in assembly and maintenance of complex electronic setups.

Related Standards

IEC 61076-4-102 relates closely to several other standards for connector technology and quality assurance:

• IEC 60917 - Specifies the metric grid system used in the connector design, ensuring uniform PCB layout.
• IEC 61076 series - Covers various aspects of connectors with assessed quality for analogue and digital applications.
• IEC 50 (International Electrotechnical Vocabulary - IEV) - Provides terminology and definitions referenced by IEC 61076-4-102.
• IEC 27, IEC 417, IEC 617, IEC 878 - Define graphical and letter symbols used to standardize technical documentation for electrotechnical components.
• IEC Quality Assessment System for Electronic Components (IECQ) - Provides the certification framework under which these connectors are assessed and approved.

By aligning with these standards, IEC 61076-4-102 ensures interoperability, safety, and performance consistency for printed board connectors across global industries.

This standard is essential for engineers, designers, and manufacturers requiring high-performance, coded, and reliable two-part connectors for diverse electrical and electronic applications, promoting system integrity and simplified maintenance through standardized connector solutions.