EN IEC 63171-1:2026

Connectors for electrical and electronic equipment - Part 1: Detail specification for 2-way, shielded or unshielded, free and fixed connectors - Mechanical mating information, pin assignment and additional requirements for Type 1 (copper LC style)

This part of IEC 63171 covers two-way, shielded or unshielded, free and fixed connectors known as Type 1, for balanced single-pair data transmission with frequencies up to 600 MHz and with current carrying capacity up to 2,0 A at 60 °C. It specifies the common dimensions, and provides the mechanical, electrical, signal integrity, and environmental characteristics, the reliability specifications and corresponding tests for these connectors

Steckverbinder für elektrische und elektronische Einrichtungen - Teil 1: Bauartspezifikation für geschirmte oder ungeschirmte freie und feste Steckverbinder, 2-polig - Mechanische Steckinformationen, Pinbelegung und zusätzliche Anforderungen für Typ 1 (Kupfer LC Bauform)

Connecteurs pour équipements électriques et électroniques - Partie 1 : Spécification particulière pour fiches et embases écrantées ou non écrantées à 2 pôles - Informations d’accouplement mécanique, affectation des broches et exigences supplémentaires pour le type 1 (modèle LC en cuivre)

Konektorji za električno in elektronsko opremo - 1. del: Podrobne specifikacije za dvopolne, zaslonjene ali nezaslonjene, proste ali pritrjene konektorje - Informacije o mehanskih prilagoditvah, funkcije polov in dodatne zahteve za tip 1 (baker, vrsta LC)

General Information

• Status: Not Published
• Publication Date: 30-Jul-2026
• ICS: 31.220.10 - Plug-and-socket devices. Connectors
• Technical Committee: CLC/SR 48B - Connectors
• Drafting Committee: CLC/SR 48B - Connectors
• Current Stage: 6055 - Ratification Completed (DOR) - Publishing
• Start Date: 02-Mar-2026
• Due Date: 04-Feb-2027
• Completion Date: 02-Mar-2026
• Ref Project: oSIST prEN IEC 63171-1:2025 - Connectors for electrical and electronic equipment - Part 1: Detail specification for 2-way, shielded or unshielded, free and fixed connectors - Mechanical mating information, pin assignment and additional requirements for Type 1 (copper LC style)

Relations

• Refers: IEC 60050-581:2008 - International Electrotechnical Vocabulary (IEV) - Part 581: Electromechanical components for electronic equipment
• Effective Date: 20-Feb-2026
• Refers: EN 61754-20:2012/A1:2022 - Fibre optic interconnecting devices and passive components - Fibre optic connector interfaces - Part 20: Type LC connector family
• Effective Date: 03-Feb-2026
• Refers: EN 60068-1:2014 - Environmental testing - Part 1: General and guidance
• Effective Date: 03-Feb-2026
• Refers: EN 61754-20:2012 - Fibre optic interconnecting devices and passive components - Fibre optic connector interfaces - Part 20: Type LC connector family
• Effective Date: 03-Feb-2026
• Refers: EN IEC 63171:2021 - Connectors for electrical and electronic equipment - Shielded or unshielded free and fixed connectors for balanced single-pair data transmission with current-carrying capacity - General requirements and tests
• Effective Date: 03-Feb-2026
• Refers: EN IEC 60512-1:2018 - Connectors for electrical and electronic equipment - Tests and measurements - Part 1: Generic specification
• Effective Date: 03-Feb-2026
• Revises: EN IEC 63171-1:2020 - Connectors for electrical and electronic equipment - Part 1: Detail specification for two-way, shielded or unshielded, free and fixed connectors - Mechanical mating information, pin assignment and additional requirements for Type 1 copper LC style
• Effective Date: 16-Sep-2025

Overview

EN IEC 63171-1:2026 is an internationally recognized standard developed by the European Committee for Electrotechnical Standardization (CLC), focusing on connectors for electrical and electronic equipment. This standard provides a detailed specification for 2-way, shielded or unshielded, free and fixed connectors - known as Type 1 (copper LC style) - designed for balanced single-pair data transmission. EN IEC 63171-1:2026 defines mechanical mating information, pin assignments, and additional requirements for connectors supporting frequencies up to 600 MHz and current carrying capacity up to 2,0 A at 60 °C.

These Type 1 connectors are suitable for a wide range of industrial and commercial applications, supporting high-speed data communication and power delivery using copper cabling in environments demanding reliability and interoperability.

Key Topics

• Connector Types: Covers 2-way, shielded or unshielded, free (cable-attached) and fixed (chassis or PCB-mounted) connectors, all in the copper LC style form factor.
• Application Scope: Intended for balanced single-pair data transmission systems operating at frequencies up to 600 MHz and carrying up to 2,0 A at 60 °C.
• Mechanical and Electrical Specifications: Details standard dimensions, pin assignments, and requirements ensuring compatibility, robustness, and electrical performance.
• Signal Integrity and Environmental Characteristics: Ensures connectors meet stringent requirements for insertion loss, return loss, insulation resistance, and environmental resilience aligned with generic cabling standards.
• Interoperability: Facilitates the interchange of connectors from different manufacturers, ensuring performance consistency and widespread usability.
• Testing and Reliability: Specifies test schedules, measurement methods, and preconditioning requirements to guarantee connector reliability across diverse environmental and operating conditions.

Applications

EN IEC 63171-1:2026 is highly relevant for manufacturers, designers, and installers involved in:

• Industrial Automation: Suitable for smart manufacturing environments demanding high-reliability single-pair Ethernet (SPE) transmissions.
• Building Automation and Control: Use in intelligent building systems requiring efficient, compact connectors for data and power distribution.
• Networking and Telecom Infrastructure: Applicable in network devices, patch panels, and cabling systems where balanced data transmission and compact connector design are crucial.
• Device-Level Connectivity: Integration in sensors, controllers, and field devices where robust and standardized copper interconnections streamline installation and maintenance.

By adhering to the connector interface, electrical characteristics, and testing outlined in EN IEC 63171-1:2026, stakeholders ensure compatibility with global cabling infrastructures, support for high-speed data transmission, and the foundation for future-proof network and automation deployments.

Related Standards

• IEC 63171: General requirements and tests for shielded/unshielded connectors for balanced single-pair data transmission.
• IEC 61754-20: Fibre optic connector interfaces - Type LC connector family (not intermateable with copper LC Type 1).
• IEC 60068-1: Environmental testing - General guidance for climatic and mechanical endurance.
• IEC 60512-1: Generic specification for connectors - Tests and measurements.
• ISO/IEC 11801-1: Information technology - Generic cabling for customer premises.
• IEEE 802.3: Ethernet standard, relevant for single-pair Ethernet (SPE) deployments.

EN IEC 63171-1:2026 ensures reliable, interoperable, and future-ready connector solutions for advancing industrial networking and electronic equipment installations. By specifying comprehensive requirements for copper LC style connectors, this standard supports high-performance data infrastructure and simplifies integration across a broad range of electrical and electronic applications.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2025
Konektorji za električno in elektronsko opremo - 1. del: Podrobne specifikacije za
dvopolne, zaslonjene ali nezaslonjene, proste ali pritrjene konektorje - Informacije
o mehanskih prilagoditvah, funkcije polov in dodatne zahteve za tip 1 (baker, vrsta
LC)
Connectors for electrical and electronic equipment - Part 1: Detail specification for 2-way,
shielded or unshielded, free and fixed connectors - Mechanical mating information, pin
assignment and additional requirements for Type 1 (copper LC style)
Steckverbinder für elektrische und elektronische Einrichtungen - Teil 1:
Bauartspezifikation für geschirmte oder ungeschirmte freie und feste Steckverbinder, 2-
polig - Mechanische Steckinformationen, Pinbelegung und zusätzliche Anforderungen für
Typ 1 (Kupfer LC Bauform)
Connecteurs pour équipements électriques et électroniques - Partie 1 : Spécification
particulière pour fiches et embases écrantées ou non écrantées à 2 pôles - Informations
d’accouplement mécanique, affectation des broches et exigences supplémentaires pour
le type 1 (modèle LC en cuivre)
Ta slovenski standard je istoveten z: prEN IEC 63171-1:2025
ICS:
31.220.10 Vtiči in vtičnice, konektorji Plug-and-socket devices.
Connectors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN IEC 63171-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2025
ICS 31.220.10 Will supersede EN IEC 63171-1:2020
English Version
Connectors for electrical and electronic equipment - Part 1:
Detail specification for 2-way, shielded or unshielded, free and
fixed connectors - Mechanical mating information, pin
assignment and additional requirements for Type 1 (copper LC
style)
(IEC 63171-1:2024)
Connecteurs pour équipements électriques et électroniques Steckverbinder für elektrische und elektronische
- Partie 1 : Spécification particulière pour fiches et embases Einrichtungen - Teil 1: Bauartspezifikation für geschirmte
écrantées ou non écrantées à 2 pôles - Informations oder ungeschirmte freie und feste Steckverbinder, 2-polig -
d'accouplement mécanique, affectation des broches et Mechanische Steckinformationen, Pinbelegung und
exigences supplémentaires pour le type 1 (modèle LC en zusätzliche Anforderungen für Typ 1 (Kupfer LC Bauform)
cuivre) (IEC 63171-1:2024)
(IEC 63171-1:2024)
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2026-01-02.

The text of this draft consists of the text of IEC 63171-1:2024.

If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 81878 Ref. No. prEN IEC 63171-1:2025 E

prEN IEC 63171-1:2025 (E)
European foreword
This document (prEN IEC 63171-1:2025) consists of the text of document IEC 63171-1:2024, prepared
by IEC/SC 48B “Electrical connectors” of IEC/TC 48 "Electrical connectors and mechanical structures
for electrical and electronic equipment ".
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this document (doa) dav + 6 months
has to be announced at national level
• latest date by which this document has to be (dop) dav + 12 months
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards (dow) dav + 36 months
conflicting with this document have to be withdrawn (to be confirmed or
modified when voting)
This document will supersede EN IEC 63171-1:2020 and all of its amendments and corrigenda (if any).
prEN IEC 63171-1:2025 (E)
Annex ZA
(normative)
Normative references to international publications with their
corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-581 2008 International Electrotechnical Vocabulary - - -
Part 581: Electromechanical components for
electronic equipment
IEC 60068-1 2013 Environmental testing - Part 1: General and EN 60068-1 2014
guidance
IEC 60512-1 2018 Connectors for electrical and electronic EN IEC 60512-1 2018
equipment - Tests and measurements - Part
1: Generic specification
IEC 61754-20 2012 Fibre optic interconnecting devices and EN 61754-20 2012
passive components - Fibre optic connector
interfaces - Part 20: Type LC connector family
+ AMD1 2022 + A1 2022
IEC 63171 2021 Connectors for electrical and electronic EN IEC 63171 2021
equipment - Shielded or unshielded free and
fixed connectors for balanced single-pair data
transmission with current-carrying capacity -
General requirements and tests
ISO/IEC 11801-1 2017 Information technology - Generic cabling for - -
customer premises - Part 1: General
requirements
IEC 63171-1 ®
Edition 2.0 2024-04
INTERNATIONAL
STANDARD
Connectors for electrical and electronic equipment –

Part 1: Detail specification for 2-way, shielded or unshielded, free and fixed

connectors – Mechanical mating information, pin assignment and additional

requirements for Type 1 (copper LC style)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.220.10  ISBN 978-2-8322-8217-5

– 2 – IEC 63171-1:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 9
4 Common features and typical connector pair . 10
4.1 Mating information . 10
4.1.1 General . 10
4.1.2 Interoperability . 10
4.1.3 Contacts – Mating conditions . 11
4.1.4 Fixed connector . 11
4.1.5 Free connector . 15
5 Characteristics . 16
5.1 General . 16
5.2 Pin assignment . 16
5.3 Classification into climatic category . 16
5.4 Electrical characteristics . 17
5.4.1 Creepage and clearance distances . 17
5.4.2 Voltage proof . 17
5.4.3 Current-temperature derating . 17
5.4.4 Initial contact resistance – interface only . 17
5.4.5 Input to output DC resistance . 17
5.4.6 Input to output DC resistance unbalanced. 17
5.4.7 Initial insulation resistance . 17
5.5 Transmission characteristics . 17
5.5.1 General . 17
5.5.2 Insertion loss (IL) . 17
5.5.3 Return loss (RL) . 18
5.5.4 Propagation delay . 18
5.5.5 Transverse conversion loss (TCL) . 18
5.5.6 Transverse conversion transfer loss (TCTL) . 18
5.5.7 Transfer impedance (shielded only) . 18
5.5.8 Coupling attenuation . 18
5.5.9 Power sum alien (exogenous) NEXT . 18
5.5.10 Power sum alien (exogenous) FEXT . 18
5.6 Mechanical characteristics . 18
5.6.1 Mechanical operation . 18
5.6.2 Effectiveness of connector coupling devices . 18
5.6.3 Insertion and withdrawal forces . 18
5.6.4 Polarizing method . 18
5.6.5 Dynamic stress . 18
6 Tests and test schedule . 19
6.1 General . 19
6.2 Example of arrangement for input to output contact resistance measurement . 19
6.3 Example of arrangement for contact resistance measurement . 19
6.4 Arrangement for vibration test (test phase DP) . 19

IEC 63171-1:2024 © IEC 2024 – 3 –
6.5 Test procedures and measuring methods . 19
6.6 Preconditioning . 20
6.7 Test schedules . 20
6.7.1 General . 20
6.7.2 Basic (minimum) test schedule . 20
6.7.3 Full test schedule . 20
Bibliography . 21

Figure 1 – Relationships between the IEC 63171 series and its related references . 7
Figure 2 – Connector overview . 8
Figure 3 – Mated fixed and free Type 1 connectors . 11
Figure 4 – Fixed Type 1 connector . 12
Figure 5 – Fixed Type 1 connector pin detail (detail A from Figure 4c) section D-D) . 14
Figure 6 – Free Type 1 connector . 15
Figure 7 – Arrangement for vibration test . 19

Table 1 – Dimensions for Figure 4a), Figure 4b) and Figure 4c) . 13
Table 2 – Dimensions for Figure 5 . 14
Table 3 – Dimensions for Figure 6a) and Figure 6b) . 16
Table 4 – Creepage and clearance distances . 17

– 4 – IEC 63171-1:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONNECTORS FOR ELECTRICAL AND ELECTRONIC EQUIPMENT –

Part 1: Detail specification for 2-way, shielded or unshielded, free and
fixed connectors – Mechanical mating information, pin assignment and
additional requirements for Type 1 (copper LC style)

FOREWORD
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