IEC 63171-1:2024

Overview - IEC 63171-1:2024 (Type 1, copper LC style)

IEC 63171-1:2024 is the Part 1 detail specification of the IEC 63171 series covering 2‑way, shielded or unshielded free and fixed connectors for balanced single‑pair data transmission. Known as Type 1 (copper LC style), this international standard defines mechanical mating information, pin assignment, common dimensions and the additional requirements that supplement the series’ general specification (IEC 63171). It applies to connectors supporting frequencies up to 600 MHz and a current carrying capacity of 2.0 A at 60 °C.

Key topics and technical requirements

• Connector scope and interoperability
  • Defines the Type 1 geometry for free (cable‑terminated) and fixed (PCB or bulkhead) connectors and interoperability expectations between mating pairs.
• Mechanical mating information
  • Common dimensions, insertion/withdrawal characteristics, coupling effectiveness and polarizing methods to prevent mis‑mating.
• Pin assignment
  • Standardized contact assignments for balanced single‑pair signalling to ensure consistent wiring and system integration.
• Electrical and signal integrity characteristics
  • Requirements for insertion loss (IL), return loss (RL), propagation delay and balance metrics (TCL, TCTL), plus transfer impedance for shielded variants.
• Environmental, reliability and mechanical tests
  • Test schedules covering mechanical operation, dynamic stress, vibration, moisture (test group BP added in this edition), temperature cycling and contact resistance measurements.
• Current and safety limits
  • Current‑temperature derating guidance and voltage/insulation criteria consistent with the series general specification.
• Edition 2 (2024) updates
  • Alignment with IEC 63171:2021 where applicable, updated licensing information, added polarizing method and dynamic stress requirements, and the new Moisture test group.

Practical applications and who uses this standard

IEC 63171-1 is directly applicable to industries and professionals specifying, designing, manufacturing or testing single‑pair connectors for data and low‑power applications:

• Connector designers and OEMs creating Type 1 LC‑style products
• PCB and cable assembly manufacturers
• Test laboratories and qualification engineers performing conformity testing and reliability verification
• System integrators and procurement teams needing standardized pinouts and mechanical mating data
• Standards and compliance engineers ensuring products meet IEC series requirements

Using IEC 63171-1 together with the IEC 63171 general specification provides the complete technical baseline required for product development, qualification and interoperability.

Related standards

• IEC 63171 (general specification, tests) - mandatory companion document for complete requirements and qualification of IEC 63171 series connectors.
• Other parts of the IEC 63171 series (detail specs for additional connector types) - refer to the IEC catalogue for published parts.