IEC 61240:2012

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

IEC 61240:2012 sets out general rules for drawing all dimensional and geometrical characteristics of a surface-mounted piezoelectric device package (referred to in this standard 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.

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

La CEI 61240:2012 donne les règles générales pour dessiner toutes les caractéristiques dimensionnelles et géométriques de dispositif piézoélectrique d'un boîtier à montage en surface afin d'assurer et l'interchangeabilité mécanique avec tous les autres dessins d'encombrement des dispositifs à 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 changés pour celles basées sur la mise en page ISO et une projection du troisième dièdre, dans lesquelles la vue de droite est ajoutée aux vues de dessus, de face et de dessous;
- la ligne de référence et les dimensions géométriques du boîtier pour enveloppes ont été changées pour une utilisation pratique;
- les informations sur les enveloppes céramiques sans plomb des dispositifs piézoélectriques (CMS) pour la commande et le choix de la fréquence ont été incluses dans une annexe.

General Information

• Status: Published
• Publication Date: 24-Jul-2012
• ICS: 31.140 - Piezoelectric devices
• Technical Committee: TC 49 - Piezoelectric, dielectric and electrostatic devices and associated materials for frequency control, selection and detection
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 24-Oct-2016

Relations

• Revised: IEC 61240:2016 - Piezoelectric devices - Preparation of outline drawings of surface-mounted devices (SMD) for frequency control and selection - General rules
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61240 ®
Edition 2.0 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Piezoelectric devices –
Preparation of outline drawings of surface-mounted devices (SMD) for frequency
control and selection – General rules

Dispositifs piézoélectriques –
Préparation des dessins d'encombrement des dispositifs à montage en surface
pour la commande et le choix de la fréquence – Règles générales
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IEC 61240 ®
Edition 2.0 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Piezoelectric devices –
Preparation of outline drawings of surface-mounted devices (SMD) for frequency

control and selection – General rules

Dispositifs piézoélectriques –

Préparation des dessins d'encombrement des dispositifs à montage en surface

pour la commande et le choix de la fréquence – Règles générales

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX R
ICS 31.140 ISBN 978-2-83220-291-3

– 2 – 61240 © IEC:2012
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Classification of SMD . 6
4 Title of the outline drawing . 7
5 Composition of the outline drawing . 7
5.1 Elements of outline drawings . 7
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
10 References . 10
Annex A (informative) Miniaturized leadless ceramic enclosures of piezoelectric
devices (SMD) for frequency control and selection . 14
Annex B (informative) Example of terminal connections for surface-mounted
piezoelectric devices (SMD) for frequency control and selection . 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 . 14
Figure A.2 – Front view (without a board) . 15
Figure A.3 – Front view (with a board) . 15

Table A.1 – Scale of drawings . 14
Table A.2 – Guideline of dimension table . 15
Table A.3 – Guideline for column “Max.” of Table A.2 for A, B . 16
Table A.4 – Examples of correspondence between new and old enclosures . 17
Table B.1 – Examples of terminal connections for various types of piezoelectric
devices . 18

61240 © IEC:2012 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PIEZOELECTRIC DEVICES –
Preparation of outline drawings of surface-mounted
devices (SMD) for frequency control and selection –
General rules
FOREWORD
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lnternational 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 second edition cancels and replaces the first edition published in 1994. 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 – 61240 © IEC:2012
The text of this standard is based on the following documents:
FDIS Report on voting
49/995/FDIS 49/1000/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication 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 web site under "http://webstore.iec.ch" in the data related to
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