IEC 63171-4:2022

Overview

IEC 63171-4:2022 is an IEC detail specification for shielded and unshielded free and fixed multimedia connectors (MMC) - Type 4 - that support balanced single-pair data transmission with current-carrying capacity. The standard covers connectors with up to 8 ways, defining common dimensions, mechanical mating information, pin assignment, electrical and transmission characteristics, environmental requirements and test specifications. It applies to transmission frequencies up to and above 3000 MHz (shielded) and up to 600 MHz (unshielded). The 2022 edition includes Corrigendum 1 (2023-08).

Key topics and technical requirements

• Mechanical mating information: form-factor details for fixed and free connector styles (examples: MMC 1P, 2P, 4P and corresponding free styles), mating dimensions and coupling device effectiveness.
• Pin assignment: standardized front-view pin maps and multi-way arrangements for consistent wiring and interoperability.
• Electrical characteristics: creepage/clearance, voltage proof, insulation resistance, contact resistance, current-temperature derating and DC resistance limits.
• Transmission characteristics: insertion loss, return loss, propagation delay, transverse conversion loss/transfer loss, power-sum alien NEXT/FEXT and (for shielded types) transfer impedance and coupling attenuation.
• Interoperability: shielded and unshielded connectors in the IEC 63171 series are specified to be interoperable for internal transmission performance and can be exchanged; shielded variants offer improved EMC and coupling properties.
• Environmental and reliability tests: defined basic and full test schedules, preconditioning, vibration and contact resistance arrangements, and other test procedures to verify mechanical, electrical and transmission performance.
• Cable sharing and structured cabling: connector form factor allows use with Telecommunications Outlets (TOs) for structured cabling installations.

Applications and practical use

• Designed primarily for Single Pair Ethernet (SPE) use cases and compatible (but not limited) with IEEE SPE standards: 10Base-T1 (802.3cg), 100Base-T1 (802.3bw), 1000Base-T1 (802.3bp), Multi-Gig Base-T1 (802.3ch) and optional Power over Data Line (PoDL, 802.3bu).
• Typical applications: structured building cabling, industrial networks, IoT/Sensor networks, equipment interfaces and any system needing single-pair data plus power over the same conductor with compact connector form factors.
• Useful for designers, connector manufacturers, network equipment OEMs, installation/specification engineers and test laboratories verifying SPE connector compliance.

Who should use this standard

• Connector and cable manufacturers for product design and interoperability
• Systems and network architects specifying SPE endpoints and TOs
• Test labs and QA teams for compliance and qualification testing
• Procurement/specification authors and OEMs creating technical requirements

Related standards

• IEC 63171 (base series specification)
• Other parts of the IEC 63171 series (Type numbers = part numbers)
• IEEE 802.3 SPE standards: 802.3cg, 802.3bw, 802.3bp, 802.3ch, 802.3bu

Keywords: IEC 63171-4, Type 4 connectors, single-pair Ethernet, SPE, shielded connector, unshielded connector, MMC, PoDL, structured cabling, IEEE 802.3.