EN 61240:2017

Piezoelectric devices - Preparation of outline drawings of surface-mounted devices (SMD) for frequency control and selection - General rules

IEC 61240:2016(E) sets out general rules for drawing all dimensional and geometrical characteristics of a surface-mounted piezoelectric device package (referred to in this document as SMD) in order to ensure mechanical inter-changeability of all outline drawings of the SMDs for frequency control and selection. This edition includes the following significant technical changes with respect to the previous edition: - outline drawings have been changed from three views (top, front and bottom) to that based on ISO layout in the third-angle projection, in which the view from the right has been added to the top, front and bottom views; - reference line and geometrical dimensions of the package for enclosures have been changed for practical use; - information on miniaturized leadless ceramic enclosures of piezoelectric devices (SMD) for frequency control and selection has been included in an annex.

Piezoelektrische Bauelemente - Anfertigung von Gehäusezeichnungen von oberflächenmontierbaren Bauelementen (SMD) zur Frequenz-Stabilisierung und -Selektion - Allgemeine Regeln

Dispositifs piézoélectriques - Préparation des dessins d'encombrement des dispositifs à montage en surface pour la commande et le choix de la fréquence - Règles générales

L'IEC 61240:2016 établit les règles générales pour dessiner toutes les caractéristiques dimensionnelles et géométriques des boîtiers de dispositifs piézoélectriques pour montage en surface (appelés CMS, composants pour montage en surface, dans le présent document) afin d'assurer l'interchangeabilité mécanique avec tous les autres dessins d'encombrement des dispositifs pour montage en surface pour la commande et le choix de la fréquence. La présente édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - les dessins d’encombrement en trois vues, (de dessus, de face et de dessous) ont été modifiés pour être conformes à la méthode de projection du troisième dièdre de l'ISO. La vue de droite a donc été ajoutée aux vues de dessus, de face et de dessous; - les dimensions des lignes de référence et les dimensions géométriques du boîtier pour les enveloppes ont été modifiées pour une utilisation pratique; - les informations sur les enveloppes céramiques sans fils de sortie miniaturisées des dispositifs piézoélectriques pour montage en surface (CMS) pour la commande et le choix de la fréquence ont été incluses dans une annexe.

Piezoelektrični elementi - Priprava tehničnih risb površinsko montiranega elementa (SMD) za frekvenčno regulacijo in filtriranje - Splošna pravila (IEC 61240:2016)

Ta mednarodni standard postavlja splošna pravila za risanje dimenzionalnih in geometričnih karakteristik paketov površinsko montiranih piezoelektričnih elementov (v nadaljevanju SMD), da zagotovi mehanično zamenljivost vseh tehničnih risb površinsko montiranih piezoelektričnih elementov za frekvenčno regulacijo in filtriranje.

General Information

• Status: Published
• Publication Date: 19-Jan-2017
• Withdrawal Date: 27-Nov-2019
• ICS: 31.140 - Piezoelectric devices
• Technical Committee: CLC/SR 49 - Piezoelectric and dielectric devices for frequency control and selection
• Drafting Committee: IEC/TC 49 - IEC_TC_49
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 20-Jan-2017
• Completion Date: 20-Jan-2017
• Ref Project: SIST EN 61240:2017 - Piezoelectric devices - Preparation of outline drawings of surface-mounted devices (SMD) for frequency control and selection - General rules (IEC 61240:2016)

Relations

• Replaces: EN 61240:2012 - Piezoelectric devices - Preparation of outline drawings of surface-mounted devices (SMD) for frequency control and selection - General rules
• Effective Date: 03-Nov-2015

Overview - EN 61240:2017 (CLC / IEC 61240:2016)

EN 61240:2017 (identical to IEC 61240:2016) defines general rules for preparing outline drawings of surface‑mounted piezoelectric devices (SMD) used for frequency control and selection (e.g., crystal resonators, oscillators). The standard ensures mechanical interchangeability of package outlines by specifying drawing conventions, views, dimension tables and terminal details. This third edition introduces ISO third‑angle projection views, revised reference lines and dimensions, and an annex covering miniaturized leadless ceramic enclosures.

Key topics and technical requirements

• Scope and purpose: Sets rules for all dimensional and geometrical characteristics of SMD packages to guarantee mechanical interchangeability.
• Drawing composition: An outline drawing must include:
  • Four views based on ISO layout in third‑angle projection (top, front, bottom and right),
  • A table of detailed dimensions,
  • An actual‑size sketch,
  • Terminal land area drawings and terminal lead details.
• Classification of SMDs: Packages are classified as leaded, folded‑leads, or leadless depending on terminal lead structure.
• Terminal and land requirements: Specifies requirements for terminal lead geometry, terminal land areas on PCBs, and allowed connections to ensure reliable mounting and soldering.
• Descriptive notes: Standardizes metadata: package material (metal/plastic/ceramic), sealing method, number of terminals and SMD type.
• Annex on leadless ceramic enclosures: Provides guidance for miniaturized leadless ceramic packages and naming rules.
• Normative references: Cross‑references IEC 60191‑6 and related ISO/CENELEC documents for drawing and projection practices.

Practical applications and who uses it

• Component manufacturers: Create compliant outline drawings and product datasheets for crystal and frequency control SMDs.
• PCB designers and layout engineers: Use terminal land area and dimension tables for footprint design and assembly.
• Procurement and quality teams: Verify mechanical interchangeability and supplier drawings against a harmonized standard.
• Test labs and assemblers: Ensure mounting, soldering and handling practices match package definitions.
• Standards and compliance engineers: Harmonize internal drawing templates and CAD libraries with EN 61240 rules.

Related standards

• IEC 61240:2016 (international counterpart)
• IEC 60191‑6 (mechanical standardization of semiconductor device outline drawings)
• Relevant ISO/CENELEC drawing and projection standards (e.g., ISO drawing projection and geometric tolerancing standards noted in the EN foreword)

Using EN 61240:2017 helps manufacturers and designers reduce footprint errors, improve cross‑supplier interchangeability, and streamline PCB mounting of frequency control SMD components.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2017
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Piezoelectric devices - Preparation of outline drawings of surface-mounted devices
(SMD) for frequency control and selection - General rules (IEC 61240:2016)
Piezoelektrische Bauelemente - Anfertigung von Gehäusezeichnungen von
oberflächenmontierbaren Bauelementen (SMD) zur Frequenz-Stabilisierung und -
Selektion - Allgemeine Regeln (IEC 61240:2016)
Dispositifs piézoélectriques - Préparation des dessins d'encombrement des dispositifs à
montage en surface pour la commande et le choix de la fréquence - Règles générales
(IEC 61240:2016)
Ta slovenski standard je istoveten z: EN 61240:2017
ICS:
31.140 3LH]RHOHNWULþQHQDSUDYH Piezoelectric devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61240
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2017
ICS 31.140 Supersedes EN 61240:2012
English Version
Piezoelectric devices - Preparation of outline drawings of
surface-mounted devices (SMD) for frequency control and
selection - General rules
(IEC 61240:2016)
Dispositifs piézoélectriques - Préparation des dessins Piezoelektrische Bauelemente - Anfertigung von
d'encombrement des dispositifs à montage en surface pour Gehäusezeichnungen von oberflächenmontierbaren
la commande et le choix de la fréquence - Règles Bauelementen (SMD) zur Frequenz-Stabilisierung und -
générales Selektion - Allgemeine Regeln
(IEC 61240:2016) (IEC 61240:2016)
This European Standard was approved by CENELEC on 2016-11-28. 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.
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 European Standard 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61240:2017 E
European foreword
The text of document 49/1172/CDV, future edition 3 of IEC 61240, prepared by IEC/TC 49
"Piezoelectric, dielectric and electrostatic devices and associated materials for frequency control,
selection and detection" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 61240:2017.
The following dates are fixed:
• latest date by which the document has to be (dop) 2017-08-28
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2019-11-28
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61240:2012.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 61240:2016 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

ISO 1101 NOTE Harmonized as EN ISO 1101.
ISO 5456-2 NOTE Harmonized as EN ISO 5456-2.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1 When 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.cenelec.eu
Publication Year Title EN/HD Year

IEC 60191-6 -  Mechanical standardization of EN 60191-6 -
semiconductor devices -
Part 6: General rules for the preparation of
outline drawings of surface mounted
semiconductor device packages
IEC 61240 ®
Edition 3.0 2016-10
INTERNATIONAL
STANDARD
Piezoelectric devices – Preparation of outline drawings of surface-mounted

devices (SMD) for frequency control and selection – General rules

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.140 ISBN 978-2-8322-3692-5

– 2 – IEC 61240:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Classification of SMD . 6
4 Title of the outline drawing . 6
5 Composition of the outline drawing . 6
5.1 Elements of outline drawings . 6
5.2 Outline drawing . 7
5.3 Table of detailed dimensions. 7
5.4 Actual size sketch . 7
5.5 Drawing of terminal land areas . 7
5.6 Terminal lead details . 7
6 Requirements for terminal leads . 9
7 Requirements for the terminal land area . 9
8 Connections of terminal leads . 9
9 Descriptive notes . 10
Annex A (informative) Miniaturized leadless ceramic enclosures of piezoelectric
devices (SMD) for frequency control and selection . 13
A.1 Precise drawing . 13
A.2 Requirements for enclosures with 3 terminals . 15
A.3 Naming rule for new type of enclosures . 15
Annex B (informative) Example of terminal connections for surface-mounted
piezoelectric devices (SMD) for frequency control and selection . 17
Bibliography . 18

Figure 1 – Illustration of terminal projection zone . 8
Figure 2 – Example of a terminal land area . 9
Figure A.1 – Upper part of the view from above . 13
Figure A.2 – Front view (without a board) . 14
Figure A.3 – Front view (with a board) . 14

Table A.1 – Scale of drawings. 13
Table A.2 – Guideline for dimension table . 14
Table A.3 – Guideline for column “Max.” of Table A.2 for A, B . 15
Table A.4 – Examples of correspondence between new and old enclosures . 16
Table B.1 – Examples of terminal connections for various types of piezoelectric
devices . 17

IEC 61240:2016 © IEC 2016 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PIEZOELECTRIC DEVICES – PREPARATION OF OUTLINE
DRAWINGS OF SURFACE-MOUNTED DEVICES (SMD) FOR
FREQUENCY CONTROL AND SELECTION – GENERAL RULES

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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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) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61240 has been prepared by lEC technical committee 49:
Piezoelectric, dielectric and electrostatic devices and associated materials for frequency control,
selection and detection.
This third edition cancels and replaces the second edition published in 2012. It constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• outline drawings have been changed from three views (top, front and bottom) to that based
on ISO layout in the third-angle projection, in which the view from the right has been added
to the top, front and bottom views;
• reference line and geometrical dimensions of the package for enclosures have been
changed for practical use;
• information on miniaturized leadless ceramic enclosures of piezoelectric devices (SMD) for
frequency control and selection has been included in an annex.

– 4 – IEC 61240:2016 © IEC 2016
The text of this standard is based on the following documents:
CDV Report on voting
49/1172/CDV 49/1188/RVC
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

IEC 61240:2016 © IEC 2016 – 5 –
INTRODUCTION
The enclosures of quartz crystal resonators and oscillators are unified in this third edition of
IEC 61240.
Regarding the current situation of many quartz crystal device suppliers, many of them use their
own enclosure layouts in their catalogues. For the convenience of consumers, general rules of
enclosure layout and definition of size need to be unified.
The reasons prompting the revision of IEC 61240:2012 are as follow
...