SIST-TP CLC/TR 50750:2025
(Main)Report on the use of EN 45545-2 and EN 45545-5 for electronic equipment on board rolling stock
Report on the use of EN 45545-2 and EN 45545-5 for electronic equipment on board rolling stock
This document reports the experience of the users of EN 45545 2 and EN 45545 5, particularly when applying these standards to the design and compliance evaluation of electronic equipment on board of trains for their fire protection measures.
This document excludes any new requirements, considering only the requirements stated by the above listed standards.
However, since these requirements are generic and not specifically referred to electronic equipment, this document clarifies the application of EN 45445 to the complex case of electronic components and associated assemblies.
Bericht über die Verwendung von EN 45545-2 und EN 45545-5 für elektronische Einrichtungen an Bord von Bahnfahrzeugen
Rapport concernant l’utilisation de l’EN 45545-2 et de l’EN 45545-5 pour le matériel électronique à bord du matériel roulant
Poročilo o uporabi EN 45545-2 in EN 45545-5 za elektronsko opremo na tirnih vozilih
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2025
Poročilo o uporabi EN 45545-2 in EN 45545-5 za elektronsko opremo na tirnih
vozilih
Report on the use of EN 45545-2 and EN 45545-5 for electronic equipment on board
rolling stock
Bericht über die Verwendung von EN 45545-2 und EN 45545-5 für elektronische
Einrichtungen an Bord von Bahnfahrzeugen
Rapport concernant l’utilisation de l’EN 45545-2 et de l’EN 45545-5 pour le matériel
électronique à bord du matériel roulant
Ta slovenski standard je istoveten z: CLC/TR 50750:2025
ICS:
13.220.20 Požarna zaščita Fire protection
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
TECHNICAL REPORT CLC/TR 50750
RAPPORT TECHNIQUE
TECHNISCHER REPORT June 2025
ICS 13.220.20; 45.060.01
English Version
Report on the use of EN 45545-2 and EN 45545-5 for electronic
equipment on board rolling stock
Rapport concernant l'utilisation de l'EN 45545-2 et de l'EN Bericht über die Verwendung von EN 45545-2 und EN
45545-5 pour le matériel électronique à bord du matériel 45545-5 für elektronische Einrichtungen an Bord von
roulant Bahnfahrzeugen
This Technical Report was approved by CENELEC on 2025-06-02.
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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. CLC/TR 50750:2025 E
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 6
4 Main aspects and requirements of EN 45545-2 and EN 45545-5 addressed by this
document . 6
4.1 General . 6
4.2 Refinement of EN 45545-2 and EN 45545-5 scope to electronic equipment . 7
4.2.1 General . 7
4.2.2 List of main clauses of EN 45545-2:2020+A1:2023 which need guiding . 7
4.2.3 List of main clauses of EN 45545-5:2013+A1:2015 which need guiding . 8
4.3 Actors and roles. 8
4.4 FCIL template . 9
4.5 Equivalence between UL 94 Ed. 6 and EN 60695-11-10 . 9
5 Guiding the compliance evaluation of the electric and electronic devices and sub-
systems . 9
5.1 Generalities . 9
5.2 Components . 10
5.2.1 Generalities . 10
5.2.2 Integrated circuits . 11
5.2.3 Passive components . 11
5.3 PBA . 14
5.3.1 Generalities . 14
5.3.2 Single board . 14
5.3.3 Single board with piggy-back . 14
5.3.4 Board with attached connectors and cables . 14
5.4 Cables . 15
5.5 Technical cabinet . 15
5.5.1 General . 15
5.5.2 Multi board . 15
5.5.3 Integrated equipment - Rack mount type . 15
6 Installation . 15
7 Spare parts management . 15
Annex A (informative) Analysis of the equivalence between UL 94 ed. 6 (Test V-0) and
EN 60695-11-10 – Specimen . 17
A.1 Dimensions of the test specimen . 17
A.2 Specimen conditioning . 17
A.3 Test conditions . 18
A.4 Test methods . 19
A.5 Classification according to UL 94 V-0 Ed. 6 . 20
Annex B (informative) Grouping rules according to EN 45545 – Use cases relevant to electronic
subrack . 21
B.1 Example of an electronic subrack to be mounted into a rack . 21
B.2 Grouping rules applied to some boards contained in the considered example of subrack . 24
B.3 Grouping rules applied to rack and motherboard in the considered example of rack
mount . 28
Bibliography . 32
Tables
Table 1 — Examples of weight of some discrete electronic components . 11
Table 2 — Examples of weight of some disc units . 11
Table 3 — Examples of weight of some integrated circuits . 11
Table 4 — Examples of weight of electrolytic capacitors . 12
Table 5 — Examples of weight of some capacitors . 12
Table 6 — Examples of weight of some resistors . 13
Table 7 — Examples of weight of some miscellaneous passive components . 13
Table A.1 — Comparison of dimensions of the test specimen . 17
Table A.2 — Comparison of specimen conditioning . 17
Table A.3 — Comparison of laboratory atmosphere . 18
Table A.4 — Comparison of cotton conditioning . 18
Table A.5 — Comparison of test arrangements . 19
Table A.6 — Comparison of flame application and observations . 19
Table A.7 — Comparison of evaluation of results . 19
Table A.8 — Comparison of retest criteria. 20
Table A.9 — Comparison of criteria for vertical burning classification . 20
Table A.10 — Comparison of classification according to UL 94 V-0 . 20
Figures
Figure B.1 — Picture of a subrack mounted solution . 21
Figure B.2 — Schematic drawing of the subrack mounted solution . 23
Figure B.3 — Internal view of the electronic subrack . 23
Figure B.4 — Example of analogue inputs board . 25
Figure B.5 — Example of CPU board . 26
Figure B.6 — Example RS485 board . 28
Figure B.7 — Example of analysis of motherboard connectors and plastic guides . 29
Figure B.8 — Example of analysis of small electronic components placed on the PCB of the
motherboard . 30
Figure B.9 — Example of analysis of the backplane PCB . 31
European foreword
This document (CLC/TR 50750:2025) has been prepared by CLC/TC 9X “Electrical and electronic applications
for railways”.
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.
Introduction
The design, verification and testing of electronic equipment on board rolling stock is standardized by EN 50155.
This document refers to EN 45545-2 and EN 45545-5 in the clause “Fire behaviour requirements”.
However, the referred series deals with the electronic equipment in a generic and limited way:
— EN 45545-2:2020+A1:2023 deals with electronic equipment only in Table 2 – Requirements of listed
products, at EL9 and EL10 entries.
— EN 45545-5:2013+A1:2015 states requirements only for electrical equipment without any explicit reference
to electronic equipment.
As a consequence, the application of EN 45545-2 and EN 45545-5 to the case of electronic equipment on board
of trains opens the door to very different interpretations.
The return of experience reports that designers, assessors, suppliers and customers sometimes reach different
points of vie
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.