IEC 61076-4-103:1999

Overview

IEC 61076-4-103:1999 is an international standard published by the International Electrotechnical Commission (IEC) focusing on connectors designed for d.c. low-frequency analogue and digital high-speed data applications. This part (4-103) specifically addresses printed board connectors with assessed quality, detailing specifications for two-part connectors featuring shielding and a basic 2.5 mm grid. The standard is also referenced as QC 480301XX0004 within the IEC Quality Assessment System for Electronic Components (IECQ), demonstrating its quality-assured status.

This document delivers comprehensive guidelines for the design, technical characteristics, dimensions, mechanical features, electrical performance, and testing procedures applicable to two-part shielded connectors used in printed circuit boards (PCBs). Its structured approach supports manufacturers, designers, and quality assurance professionals in ensuring interoperability, reliability, and electromagnetic compatibility in connector systems subjected to low-frequency analogue and high-speed digital data transmissions.

Key Topics

• Connector Types and Variants
  This standard defines the styles and termination variants for two-part connectors with robust shielding solutions. It includes detailed descriptions of fixed board connectors (embases) and free cable connectors (plugs), as well as accessories like coding and locking mechanisms.

• Mechanical and Electrical Characteristics
  Important parameters such as contact arrangements, engagement sequences, forces of coupling and decoupling, retention mechanisms, and static load capacities are specified. Electrical considerations cover rated voltages, current capacities, contact resistance, insulation resistance, and dielectric withstand conditions.

• Dimensional Specifications
  Precise measurements including height, width, depth, and the spatial layout of contacts are elaborated to maintain consistent grid spacing of 2.5 mm. The standard provides isometric views, reference systems, and detailed configurations for mounting and mating interfaces that aid in seamless integration within electronic assemblies.

• Shielding and Electromagnetic Compatibility (EMC)
  The document emphasizes the effectiveness of shielding to ensure electromagnetic interference (EMI) protection, including guidelines for maintaining shielding continuity and grounding. It outlines test methods for discharge electrostatic protection (DES) and shielding efficacy to comply with EMC requirements.

• Testing and Quality Assurance
  Methodologies for verifying mechanical durability, electrical performance, environmental resistance, and overall connector quality are presented. The testing program includes contact resistance measurement, dynamic stress tests, static mechanical load application, dielectric tests, flammability assessment, and shielding performance verification.

Applications

IEC 61076-4-103 connectors find wide use in electronics systems where both analogue and digital data signals must be reliably transmitted at d.c. low-frequency and high data rates, making them essential in:

• Industrial automation equipment with stringent signal integrity needs
• High-speed data communication interfaces on printed circuit boards
• Medical instrumentation requiring secure and shielded connections
• Telecommunications hardware for analogue and digital signal pathways
• Automotive electronics systems demanding robust connector performance and EMI control

These connectors enable reliable interconnection in complex electronic devices, ensuring signal quality and mechanical stability even in challenging environments.

Related Standards

• IEC 60050 (International Electrotechnical Vocabulary - IEV): Provides standardized terminology relevant to electrical and electronic components, helping users interpret terms within IEC 61076-4-103 correctly.
• IEC 60027 (Letter Symbols for Electrical Technology): Defines symbols used in electrical documentation, referenced for consistent graphical representation.
• IEC 60417 (Graphical Symbols for Use on Equipment): Supplies approved graphical symbols that may be applied on connectors for identification and compliance.
• IEC 60617 (Graphical Symbols for Diagrams): Offers symbols used in schematic diagrams related to connectors and electrical systems.
• IEC Quality Assessment System for Electronic Components (IECQ): Ensures standardized quality assessment processes for electronic parts, including connectors covered by this standard.

By adhering to IEC 61076-4-103:1999, manufacturers and designers can ensure the production and implementation of high-quality, reliable, and interoperable two-part printed board connectors with shielding-critical for modern low-frequency analogue and high-speed digital data transmission applications.