IEC 63138-3:2022

Overview

IEC 63138-3:2022 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies sectional requirements for MQ5 series circular multi-channel radio frequency (RF) connectors. This part of the IEC 63138 series focuses on the preparation of detail specifications for MQ5 circular connectors featuring five RF channels with a nominal impedance of 50 Ω. The standard details the mating face dimensions, gauging information, and quality assessment procedures along with applicable tests derived from IEC 63138-1. It supports both quick-lock and threaded coupling mechanisms for plug and socket connectors, targeting applications in mobile communication systems and other RF communication equipment.

Key Topics

• MQ5 Connector Design
  The MQ5 series consists of circular connectors with five RF channels that can be simultaneously engaged or disengaged. Two plug connector types are standardized:

  • Quick-lock plug connector
  • Threaded plug connector
    The socket connector supports both quick-lock and threaded coupling methods.

• Mating Face and Gauging
  IEC 63138-3:2022 defines precise mating face dimensions for MQ5 connectors to ensure compatibility and interchangeability. Comprehensive gauging instructions are provided for:

  • RF channel contacts
  • Plug outer contact gauge rings
  • MQ5 socket and plug connectors

• Quality Assessment
  Methods for evaluating the quality of MQ5 connectors include general inspection procedures, rating characteristics, and periodic testing. The standard describes:

  • Inspection protocols for conformity assessment
  • Lot-by-lot inspection plans
  • Periodic verification methods tailored to maintain quality and performance standards

• Detail Specification Preparation
  The document includes guidelines on preparing detail specifications for MQ5 connectors, covering:

  • Component identification
  • Performance criteria
  • Marking and ordering information
  • Selection of tests and severity levels
  • A blank detail specification pro-forma for ease of customization

Applications

MQ5 series circular connectors conforming to IEC 63138-3:2022 are ideal for use in:

• Mobile communication infrastructure, enabling reliable multi-channel RF signal transmission
• Telecommunications equipment requiring robust, quick-connect multi-channel RF connectivity
• RF and microwave passive components in aerospace, automotive, and defense applications
• Any multi-channel RF environment demanding high-quality connectors with standardized mating dimensions and proven performance reliability

Implementing this standard facilitates system interoperability, reduces design risks, and ensures worldwide compatibility for MQ5 RF connectors.

Related Standards

• IEC 63138-1:2019 – Multi-channel radio-frequency connectors – Part 1: Generic specification covering general requirements and test methods applicable to all connector types within the IEC 63138 series.
• IEC 63138 series (other parts) – Address various configurations and families of multi-channel RF connectors, complementing Part 3's focus on MQ5 series.
• ISO/IEC Directives – Standard development processes aligning IEC 63138 documents with international standardization best practices.

Summary

IEC 63138-3:2022 delivers critical specifications for MQ5 multi-channel RF circular connectors, standardizing geometric and performance parameters to boost reliability and product interoperability in RF communication systems. It is a valuable resource for manufacturers, engineers, and quality professionals designing or selecting MQ5 RF connectors, ensuring compliance with internationally recognized standards for multi-channel radio frequency connectivity.