SIST EN 61811-1:2015/A1:2026

Amendment 1 - Electromechanical telecom elementary relays of assessed quality - Part 1: Generic specification and blank detail specification

Elektromechanische Telekom-Elementarrelais mit bewerteter Qualität - Teil 1: Fachgrundspezifikation und Bauartspezifikation

Amendement 1 - Relais télécom électromagnétiques élémentaires soumis au régime d'assurance qualité - Partie 1: Spécification générique et spécification particulière cadre

Elektromehanski telekomunikacijski stikalni releji ocenjene kakovosti - 1. del: Rodovna specifikacija in okvirna podrobna specifikacija - Dopolnilo A1

General Information

• Status: Published
• Public Enquiry End Date: 30-May-2025
• Publication Date: 11-Mar-2026
• ICS: 29.120.70 - Relays
• Technical Committee: ISS EIT.ERE - All-or-nothing electrical relays
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 23-Feb-2026
• Due Date: 30-Apr-2026
• Completion Date: 12-Mar-2026
• Ref Project: EN 61811-1:2015/A1:2026 - Electromechanical telecom elementary relays of assessed quality - Part 1: Generic specification and blank detail specification

Relations

• Amends: SIST EN 61811-1:2015 - Electromechanical all-or-nothing telecom relays of assessed quality - Part 1: Generic specification and blank detail specification
• Effective Date: 01-Apr-2026

Overview

SIST EN 61811-1:2015/A1:2026 is a European standard established by CENELEC (CLC) that outlines requirements for electromechanical telecom elementary relays of assessed quality. This standard serves as both a generic specification and a blank detail specification, providing a foundation for quality assessment and conformity across the telecom industry. The 2026 amendment (A1) aligns directly with IEC 61811-1:2015/AMD1:2025 and supports manufacturers and stakeholders in consistent relay evaluation, product qualification, and process documentation.

Key Topics

• Assessed Quality Standards: The standard sets out criteria for evaluating the quality of electromechanical telecom relays used in communication equipment, focusing on reliability and performance.
• Generic and Blank Detail Specifications: SIST EN 61811-1:2015/A1:2026 supplies both high-level and template-based guidance, which allows for adaptation to different relay product types.
• Conformance Inspections: Procedures for quality conformance, including contact-circuit resistance stability, are specified to ensure component robustness under repeated cycles and varying operational demands.
• Industrial Qualification Guidelines: Updates in Annex C address industrial qualification, refining how resistance stability is measured, classified, and reported for telecom relay contacts.
• Amendment Updates: The A1:2026 amendment introduces updated inspection protocols and qualification criteria to reflect current industry practices and harmonization with international standards.

Applications

SIST EN 61811-1:2015/A1:2026 applies widely in the telecommunications sector, especially where quality assurance is critical for system reliability:

• Telecom Switching Equipment: Ensures relays meet minimum stability and performance requirements in voice and data networks.
• Network Infrastructure: Supports manufacturers in qualifying relays used in central office, exchange, and access network architectures.
• Relay Manufacturers: Provides a framework for product development, process control, and documentation, streamlining compliance and customer assurance.
• Quality Auditors and Purchasers: Enables simplified procurement by referencing unified specifications and inspection procedures.

Organizations implementing this standard benefit by reducing product failures, ensuring interoperability, and supporting market access for telecom equipment in Europe and globally.

Related Standards

• IEC 61811-1:2015/AMD1:2025 - The international baseline for the European version, providing global consistency.
• EN 61810 Series - General standards on electromechanical relays, covering terminology, definitions, and product family specifications.
• EN 60947 Series - Low-voltage switchgear and control gear, relevant for wider electromechanical device standardization.
• EN 50178 - Applies to electronic equipment in power installations, which may utilize telecom relays.

These related standards complement SIST EN 61811-1:2015/A1:2026, enabling comprehensive coverage for relay qualification, performance, and assessment in various electrical and telecom applications.

---

By adhering to SIST EN 61811-1:2015/A1:2026, organizations promote higher reliability, greater operational consistency, and faster innovation cycle times in the telecom relay segment. It is a key reference for manufacturers, network operators, and regulators committed to quality in telecommunications infrastructure.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2026
Elektromehanski telekomunikacijski stikalni releji ocenjene kakovosti - 1. del:
Rodovna specifikacija in okvirna podrobna specifikacija - Dopolnilo A1
Amendment 1 - Electromechanical telecom elementary relays of assessed quality - Part
1: Generic specification and blank detail specification
Elektromechanische Telekom-Elementarrelais mit bewerteter Qualität - Teil 1:
Fachgrundspezifikation und Bauartspezifikation
Amendement 1 - Relais télécom électromagnétiques élémentaires soumis au régime
d'assurance qualité - Partie 1: Spécification générique et spécification particulière
cadre
Ta slovenski standard je istoveten z: EN 61811-1:2015/A1:2026
ICS:
29.120.70 Releji Relays
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61811-1:2015/A1

NORME EUROPÉENNE
EUROPÄISCHE NORM February 2026
ICS 29.120.70
English Version
Electromechanical telecom elementary relays of assessed
quality - Part 1: Generic specification and blank detail
specification
(IEC 61811-1:2015/AMD1:2025)
Relais télécom électromagnétiques élémentaires soumis au Elektromechanische Telekom-Elementarrelais mit
régime d'assurance qualité - Partie 1 : Spécification bewerteter Qualität - Teil 1: Fachgrundspezifikation und
générique et spécification particulière-cadre Bauartspezifikation
(IEC 61811-1:2015/AMD1:2025) (IEC 61811-1:2015/AMD1:2025)
This amendment A1 modifies the European Standard EN 61811-1:2015; it was approved by CENELEC on 2026-01-19. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists 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.

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
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61811-1:2015/A1:2026 E

European foreword
The text of document 94/1172/FDIS, future edition 2 of IEC 61811-1/AMD1, prepared by TC 94
"Electrical relays" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2027-02-28
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-02-28
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61811-1:2015/AMD1:2025 was approved by CENELEC as
a European Standard without any modification.

IEC 61811-1 ®
Edition 2.0 2025-12
INTERNATIONAL
STANDARD
AMENDMENT 1
Electromechanical telecom elementary relays of assessed quality -
Part 1: Generic specification and blank detail specification
ICS 29.120.70  ISBN 978-2-8327-0925-2

IEC 61811-1:2015-01/AMD1:2025-12(en)

IEC 61811-1:2015/AMD1:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electromechanical telecom elementary relays of assessed quality -
Part 1: Generic specification and blank detail specification

AMENDMENT 1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National
...