IEC 61169-8:2007

Overview

IEC 61169-8:2007 is the sectional specification for RF coaxial connectors commonly known as type BNC. It covers flange and interface details for connectors with an inner diameter of outer conductor 6.5 mm (0.256 in) and characteristic impedance 50 Ω, using a bayonet lock for quick connect/disconnect, low‑power applications. The document provides rules for preparing detail specifications (DS), mandatory tests (referencing IEC 61169-1), dimensional data, gauging and test connector definitions, and recommended performance and inspection schedules.

Key Topics and Requirements

• Interface dimensions: Precise dimensional drawings and tables (mm/inch) for pin- and socket-centre BNC connectors and coupling features.
• Mechanical gauges & standard test connectors: Gauging methods and test connector geometries to verify mechanical conformity.
• Outline dimensions: Standardized connector and center-contact outline dimensions for manufacturer and design reference.
• Quality assessment procedures (Clause 7): New in this edition - guidance on ratings, characteristics, test schedules, inspection sampling and procedural requirements.
• Instructions for preparation of detail specifications (Clause 8): New guidance for creating DS documents, including identification, performance requirements, marking and test selection.
• Mandatory tests: Selection of applicable tests and references to measuring methods from IEC 61169-1 (generic RF connector requirements).
• Environmental and climatic considerations: Recommended climatic categories and references to environmental test standards (e.g., IEC 60068-1).
• Annex A: Informative information for 75 Ω variants with unspecified reflection factor.

Practical Applications

IEC 61169-8:2007 is intended for components used in:

• RF test and measurement equipment
• Broadcast and video systems (where 50 Ω BNCs are required)
• Laboratory and instrumentation cabling
• Low‑power RF interconnects requiring frequent mating/unmating

The standard facilitates consistent design, manufacturing and testing of BNC connectors to ensure mechanical compatibility and predictable electrical behaviour.

Who Uses This Standard

• Connector and cable manufacturers preparing detail specifications (DS)
• Design and test engineers specifying RF interconnects
• Quality and compliance laboratories performing acceptance and periodic tests
• Procurement and standards teams requiring conformance to international RF connector norms

Related Standards

• IEC 61169-1 - Generic specification; general requirements and measuring methods
• IEC 60096-2 (and IEC 60096 series) - Radio‑frequency cable specifications (60096 IEC 50-3)
• IEC 60068-1 - Environmental testing - general guidance
• IEC 61169 series - Other RF connector sectional specifications

Keywords: IEC 61169-8:2007, BNC connector, RF coaxial connector, 50 Ω, bayonet lock, interface dimensions, quality assessment, detail specification, IEC 61169-1, IEC 60096-2.