FprEN IEC 60297-3-101:2026

SLOVENSKI STANDARD
oSIST prEN IEC 60297-3-101:2025
01-julij-2025
Mehanske strukture za električno in elektronsko opremo - Mere mehanskih
konstrukcij v seriji 482,6 mm (19 in) - 3-101. del: Podokviri in pripadajoče vtične
enote
Mechanical structures for electrical and electronic equipment - Dimensions of
mechanical structures of the 482,6 mm (19 in) series - Part 3-101: Subracks and
associated plug-in units
Structures mécaniques pour équipements électriques et électroniques - Dimensions des
structures mécaniques de la série 482,6 mm (19 pouces) - Partie 3-101: Bacs et blocs
enfichables associés
Ta slovenski standard je istoveten z: prEN IEC 60297-3-101:2025
ICS:
31.240 Mehanske konstrukcije za Mechanical structures for
elektronsko opremo electronic equipment
oSIST prEN IEC 60297-3-101:2025 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 60297-3-101:2025

oSIST prEN IEC 60297-3-101:2025
48D/784/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60297-3-101 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-06-13 2025-09-05
SUPERSEDES DOCUMENTS:
48D/781/RR
IEC SC 48D : MECHANICAL STRUCTURES FOR ELECTRICAL AND ELECTRONIC EQUIPMENT
SECRETARIAT: SECRETARY:
Germany Mr Arno Bergmann
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

SC 48B
ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
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the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Mechanical structures for electrical and electronic equipment - Dimensions of mechanical
structures of the 482,6 mm (19 in) series - Part 3-101: Subracks and associated plug-in units

PROPOSED STABILITY DATE: 2029
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oSIST prEN IEC 60297-3-101:2025
IEC 60297-3-101 ED2 © IEC 2025 2

Link to Committee Draft for Vote (CDV) online document:
https://osd.iec.ch/#/editor/archive/3254aae0-cbab-d2e4-e063-2b13000a596f/en/CCDV/1

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oSIST prEN IEC 60297-3-101:2025
IEC 60297-3-101 ED2 © IEC 2025 3
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Arrangement overview . 9
5 Subrack dimensions . 9
5.1 General . 9
5.2 Subrack dimensions, front mounting area . 10
5.3 Subrack dimensions, rear mounting area . 12
6 Plug-in unit dimensions . 13
6.1 General . 13
6.2 Printed board type plug-in units, front mounted . 13
6.3 Box-type plug-in units, front mounted . 15
6.4 Printed board type plug-in units, rear mounted . 17
7 Dimensions used in the figures . 18
7.1 Dimension symbols and definition . 18
7.1.1 Height . 18
7.1.2 Width . 18
7.1.3 Depth . 19
7.2 Dimensions . 19
8 Subrack and plug-in units with electromagnetic shielding provisions . 20
8.1 General . 20
8.2 Subrack shielding interface dimensions . 21
8.3 Plug-in unit and filler panels with electromagnetic shielding provisions . 21
9 Plug-in units electrostatic discharge provisions . 22
9.1 General . 22
9.2 ESD contact interface dimensions . 23
Bibliography . 24

Figure 1 – Traditional 19-inch racks and chassis configurations, and Conventional 19-
inch subrack system . 7
Figure 2 – Arrangement overview . 9
Figure 3 – Mechanical relations between the subrack front mounting area and the
subrack rear mounting area . 10
Figure 4 – Subrack dimensions, front mounting area - Part 1 . 11
Figure 5 – Subrack dimensions, front mounting area - Part 2 . 12
Figure 6 – Subrack dimensions, rear mounting area . 13
Figure 7 – Printed board type plug-in units, 3U . 14
Figure 8 – Printed board type plug-in units, 6U and 9U . 15
Figure 9 – Box-type plug-in unit, 3U . 16
Figure 10 – Box-type plug-in unit, 6U and 9U . 17
Figure 11 – Printed board type plug-in units, rear mounted dimensions. 18
oSIST prEN IEC 60297-3-101:2025
4 IEC 60297-3-101 ED2 © IEC 2025
Figure 12 – Subrack shielding interface dimensions . 21
Figure 13 – Plug-in unit and filler panels shielding interface dimensions . 22
Figure 14 – ESD contact interface dimensions . 23
Figure 15 – ESD strip interface dimensions . 23

Table 1 – Hight dimensions . 19
Table 2 – Hight dimensions . 19
Table 3 – Depth dimensions for front mounting area . 20
Table 4 – Depth dimensions RD1, RD3 and DR for rear mounting area . 20

oSIST prEN IEC 60297-3-101:2025
IEC 60297-3-101 ED2 © IEC 2025 5
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Mechanical structures for electrical and electronic equipment -
Dimensions of mechanical structures of the 482,6 mm (19 in) series - Part
3-101: Subracks and associated plug-in units –

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to
promote international co-operation on all questions concerning standardization in the electrical and
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced
publications is indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed
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identifying any or all such patent rights.
oSIST prEN IEC 60297-3-101:2025
6 IEC 60297-3-101 ED2 © IEC 2025
IEC 60297-3-101 has been prepared by subcommittee 48D: Mechanical structures for electrical and
electronic equipment, of IEC technical committee. It is an International Standard.
This second edition cancels and replaces the first edition published in 2004. This edition constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
This edition was created based on the technological schemes of entire modular structure of the 19 in
standards IEC 60297-3-XXX series which is clarified by IEC TR 60297-3-1:2023.
All figures were improved to make all interface dimensions and definitions clear understanding for
users of this document.
The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
Full information on the voting for its approval can be found in the report on voting indicated in the
above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available at
www.iec.ch/members_experts/refdocs. The main document types developed by IEC are described in
greater detail at www.iec.ch/publications.
The committee has decided that the contents of this document will remain unchanged until the stability
date indicated on the IEC website under webstore.iec.ch in the data related to the specific document.
At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
oSIST prEN IEC 60297-3-101:2025
IEC 60297-3-101 ED2 © IEC 2025 7
INTRODUCTION
The IEC 60297 series, Mechanical structures for electrical and electronic equipment - Dimensions of
mechanical structures of the 482,6 mm (19 in) series, contains dimensional definitions of the entire
mechanical structure layers from level 1 to level 4 for electrical and electronic equipment practices.
Applications of the IEC 60297 series are divided into two different perceptions by the users:
a) the traditional 19-inch racks and chassis configurations, and
b) the 19-inch subrack system.
The latter has been providing effective and rational solutions for the critical issues on interconnection
and packaging for electronic equipment, which have been in a close relationship with the IEC
connector standards of IEC SC 48B, in the microelectronics era since the 1960s.
In the 1980s, the 19-inch subrack system was adopted as the mechanical specifications for open
computer bus standards in the IEEE and other manufacturers' associations or industrial consortia. In
such fields, not only newly developed high-performance connectors have been applied, but also
advanced mechanical features have been developed, based on the 19-inch subrack system. These
new technologies have been standardized, and their efforts co
...