IEC 61076-3-103:2003

Overview

IEC 61076-3-103:2003 specifies a family of shielded, rectangular single-row connectors with non-removable ribbon cable contacts on a 1.25 mm pitch intended for high speed serial data (HSSDC) wire-to-board applications. The standard establishes uniform dimensional requirements, electrical and mechanical characteristics, test schedules, and quality assessment procedures for an 8‑position connector interface used where controlled impedance and reliable high-speed signal integrity are required.

Key topics and requirements

• Connector geometry and variants
  • Rectangular mating interface, shielded design, single row, 1.25 mm pitch, 8 positions.
  • Defined styles for fixed board (XB) and free cable (EC) connectors with multiple mounting options (right‑angle, bulkhead, straddle, bracket assemblies).
• Dimensional and mating information
  • Detailed drawings for mating dimensions, PCB footprints, panel cutouts and mounting brackets to ensure interchangeability.
• Electrical characteristics
  • Requirements related to contact resistance, characteristic impedance and signal integrity; normative annexes include eye pattern and characteristic impedance guidance.
• Mechanical and environmental characteristics
  • Mechanical performance (durability, mating/unmating forces), vibration and shock test fixtures, and climatic category requirements.
• Test schedule and quality assessment
  • Comprehensive test groups (general examination, electrical, mechanical, environmental) with qualification approval and re‑inspection procedures to support consistent manufacturing quality.

Practical applications

IEC 61076-3-103 targets designers, manufacturers and test labs working with high‑speed serial interfaces where compact ribbon-cable wire-to-board connections are needed. Typical applications include:

• Telecommunications and networking equipment
• Data storage and server backplanes
• Instrumentation and test equipment
• Embedded systems and board-level interconnects requiring controlled impedance and reliable high-speed performance

Who uses this standard:

• Connector and cable designers
• PCB layout engineers implementing mating footprints and panel cutouts
• OEMs and contract manufacturers specifying components for high-speed data links
• Test labs and quality engineers performing qualification and production testing

Related standards

• Other parts of the IEC 61076 series cover rectangular connector families and complementary detail specifications - refer to the IEC catalogue for related connector standards and updates.

Keywords: IEC 61076-3-103, HSSDC, 1.25 mm pitch, single row connectors, rectangular connectors, ribbon cable contacts, wire-to-board, connector specification, test schedule, characteristic impedance, eye pattern.