IEC 63171-2:2021

Overview

IEC 63171-2:2021 specifies the detail requirements for Type 2 - 2‑way, shielded or unshielded, free and fixed connectors used for balanced single‑pair data transmission with current‑carrying capacity. The standard covers connector mechanical mating information, pin assignment, common dimensions, electrical and transmission characteristics (up to 600 MHz), environmental requirements and the related test specifications. The Type 2 form factor supports cable sharing with already installed TOs in structured cabling; when doing so, the overall transmission channel performance must be evaluated.

Key topics and technical requirements

• Connector types and form factor
  • Definitions for free (plug) and fixed (receptacle) versions, including shielded and unshielded variants.
  • Detailed mechanical mating information and dimensional limits to ensure interoperability.
• Pin assignment
  • Standardized front‑face pin assignment for consistent wiring and mating.
• Electrical and transmission characteristics
  • Rated for data transmission up to 600 MHz and specified current‑carrying capacity.
  • Transmission performance requirements and limits; shielded versions provide improved alien crosstalk and coupling attenuation.
• Environmental and mechanical requirements
  • Climatic classification, mechanical durability, and sealing/locking or snap‑in mechanisms for mating integrity.
• Tests and verification
  • Test schedules and methods for contact resistance, vibration, signal integrity, environmental stress and preconditioning per referenced IEC test standards.
• Interoperability
  • Shielded and unshielded versions are interoperable for internal transmission performance and can be exchanged.
  • Related circular sealed and intermateable versions are addressed in IEC 63171‑5.

Practical applications - who uses this standard

• Connector and cable manufacturers designing Type 2 balanced single‑pair connectors with power delivery.
• System integrators and structured cabling designers evaluating cable sharing with installed TOs and ensuring channel performance.
• Test laboratories and conformity assessment bodies performing mechanical, electrical and signal integrity tests up to 600 MHz.
• Product specifiers and procurement teams requiring a common mechanical and electrical interface for interoperable connectors in data, industrial and building automation deployments.

Related standards

• IEC 63171 (base series) - general requirements
• IEC 63171‑5 - circular sealed/intermateable variants
• IEC 60512‑1 and IEC 60512‑28‑100 - connector tests and signal integrity
• IEC 60664‑1, IEC TR 63040 - insulation and creepage/clearance guidance
• ISO/IEC 11801‑1 - generic cabling requirements

Keywords: IEC 63171-2:2021, Type 2 connector, 2‑way connector, shielded connector, unshielded connector, 600 MHz, pin assignment, mechanical mating, structured cabling, alien crosstalk, coupling attenuation, connector test specifications.