IEC 60393-6-1:2003

INTERNATIONAL IEC
STANDARD
60393-6-1
First edition
2003-05
Potentiometers for use
in electronic equipment –
Part 6-1:
Blank detail specification:
Surface mount preset potentiometers –
Assessment level E
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
Consolidated editions
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INTERNATIONAL IEC
STANDARD
60393-6-1
First edition
2003-05
Potentiometers for use
in electronic equipment –
Part 6-1:
Blank detail specification:
Surface mount preset potentiometers –
Assessment level E
 IEC 2003  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch  Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
N
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 60393-6-1  IEC:2003(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POTENTIOMETERS FOR USE IN ELECTRONIC EQUIPMENT –
Part 6-1: Blank detail specification:
Surface mount preset potentiometers –
Assessment level E
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60393-6-1 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
40/1289/FDIS 40/1325/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.
This Blank Detail Specification is to be used in conjunction with IEC 60393-1:1989 and
IEC 60393-6:2003.
The committee has decided that the contents of this publication will remain unchanged
until 2008. 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.

60393-6-1  IEC:2003(E) – 3 –
POTENTIOMETERS FOR USE IN ELECTRONIC EQUIPMENT
Part 6-1: Blank detail specification:
Surface mount preset potentiometers –
Assessment level E
INTRODUCTION
Blank Detail Specification
A Blank Detail Specification is a supplementary document to the Sectional Specification and
contains requirements for style, layout and minimum content of Detail Specifications. Detail
Specifications not complying with these requirements are not to be considered as being in
accordance with IEC Specifications nor are they to be so described.
In the preparation of Detail Specifications, the content of 1.4 of IEC 60393-6 is to be taken
into account.
The numbers between square brackets on the first page correspond to the following
information which is to be inserted in the position indicated.
Identification of the Detail Specification
[1] The “International Electrotechnical Commission” or the National Standard Organization
under whose authority the Detail Specification is drafted.
[2] The IEC or National Standards number of the Detail Specification, date of issue and any
further information required by the national system.
[3] The number and issue number of the IEC or national Generic Specification.
[4] The IEC number of the Blank Detail Specification.
Identification of the potentiometer
[5] A short description of the type of potentiometer.
[6] Information on typical construction (if applicable) for example: non-wirewound, lead-
screw actuated.
[7] Outline drawing with main dimensions which are of importance for interchangeability
and/or reference to the national or international documents for outlines. Alternatively, this
drawing may be given in an annex to the Detail Specification.
[8] Application or group of applications covered and/or assessment level.
[9] Reference data on the most important properties, to allow comparison between the
various potentiometer types.
– 4 – 60393-6-1  IEC:2003(E)
[1] IEC 60393-6-1-XXX [2]
QC 410501XXXXXX
ELECTRONIC COMPONENTS OF ASSESSED IEC 60393-6-1 [4]
QUALITY IN ACCORDANCE WITH :
QC 410501
[3] SURFACE MOUNT [5]
PRESET POTENTIOMETERS
Outline drawing and dimensions:
(··· angle projection)
[7] Typical construction: [6]
(When necessary the dimensions may be given in
annex to the Detail Specification)
Terminal connections: Assessment level: E [8]
For [1] to [9], see the Introduction.
Information on the availability of components qualified
to this Detail Specification is given in the
register of approvals.
[9]
Table 1 – Important properties
Style Rated dissipation Limiting element voltage Insulation voltage
at 70 °C (DC or AC r.m.s.) (DC or AC peak)
V
W V
Normal air pressure Low air pressure
1 General data
1.1 Recommended method(s) of mounting (to be inserted)
(See 1.4.2 of IEC 60393-6).
1.2 Dimensions
(When necessary, the dimensions may be given in an annex to the Detail Specification).
All dimensions are in millimetres.

60393-6-1  IEC:2003(E) – 5 –
1.3 Ratings and characteristics
Resistance range . Ω to . Ω
Tolerances on rated resistance ± . %
Resistance law (if other than linear) .
Temperature characteristic of resistance
(20 °C to 70 °C) ΔR/R ≤ . %
-6
Temperature coefficient α ≤. 10 /K
Climatic category -/-/-
Low air pressure 8 kPa
Limits of resistance change ±( . % R + . Ω)
(after 500 h or 1 000 h electrical endurance test)
Starting torque . mN.m to . mN.m
Total mechanical travel . ± . turns or . °
Limiting moving contact current . mA
1.3.1 Derating
Potentiometers covered by this Specification are derated according to the following curve:
(A suitable curve to be included
in the Detail Specification)
NOTE See also 2.2.3 of IEC 60393-6.
1.4 Normative references
Generic Specification: IEC 60393-1:1989, Potentiometers for use in electronic equipment –
Part 1: Generic specification
Amendment 1 (1992)
Sectional Specification: IEC 60393-6:2003, Potentiometers for use in electronic equipment –
Part 6: Sectional specification: Surface mount preset potentiometers
1.5 Marking
The marking of the component and package shall be in accordance with the requirements
of 1.4.6 of IEC 60393-6.
The details of the marking of the component and package shall be given in full in the Detail
Specification.
___________
The preferred values are those of the E-series of IEC 60063 and/or the 1, 2, 5 series.

– 6 – 60393-6-1  IEC:2003(E)
1.6 Ordering information
Orders for potentiometers covered by this Specification shall contain, in clear or in coded
form, the following minimum information:
a) rated resistance and tolerance on rated resistance;
b) resistance law (if other than linear);
c) number and issue reference of the Detail Specification and style;
d) packaging instructions.
1.7 Certified records of released lots
Required/not required.
1.8 Additional information (not for inspection purposes)
(The Detail Specification may include information such as circuit diagrams, curves, drawings
and notes needed for clarification of the Detail Specification).
1.9 Additional or increased severities or requirements to those specified in
the Generic and/or Sectional Specification
NOTE Additions or increased requirements should be specified only when essential.

60393-6-1  IEC:2003(E) – 7 –
2 Inspection requirements
2.1 Procedures
2.1.1 For qualification approval, the procedures shall be in accordance with 3.2 of
IEC 60393-6.
2.1.2 For quality conformance inspection, the test schedule (Table 2) includes sampling,
periodicity, severities and requirements. The formation of inspection lots is covered by 3.3.1
of IEC 60393-6.
For the quality conformance inspection, the values representative of the whole approved
range shall be tested within one year (Groups A, B and C only).
When drying is called for, Procedure I of 4.3 of IEC 60393-1 shall be used.
Table 2 – Test schedule for quality conformance inspection: lot-by-lot
Subclause number
D IL AQL Performance
and test of
Conditions of test requirements
or
IEC 60393-1
(see NOTE 1) (see NOTE 2) (see NOTE 1)
(see NOTE 1) ND
GROUP A INSPECTION
(lot-by-lot)
Subgroup A1 ND II 4,0 %
4.4.1 Visual examination As in 4.4.1 of IEC 60393-1
As specified in 1.5 of this
Specification
Subgroup A2
ND II 1,0 %
4.6 Element As in 4.6.3 of IEC 60393-1
resistance
Subgroup A3
ND S-2 4,0 %
4.4.2 Dimensions As specified in the Detail
(gauging) Specification
Subgroup A4 ND S-3 1,0 %
4.7 Terminal Resistance between a and b R ≤ . Ω
resistance
Resistance between b and c
R ≤ . Ω
4.5 Continuity As in 4.5.2 of IEC 60393-1
≤ . % R or . Ω
4.15 Rotational noise
Method B:
(whichever is the greater)
4.12 Voltage proof Method:
As in 4.12.5
(insulated
Insulation resistance
≥ 100 MΩ
potentiometers
(normal air pressure)
only)
GROUP B INSPECTION
(lot-by-lot)
Subgroup B1
D S-2 1,5 %
4.18 Starting torque As specified in the Detail
Specification
4.31 Sealing Temperature: 85 °C to 90 °C As in 4.31.3 of IEC 60393-1
(if applicable)
– 8 – 60393-6-1  IEC:2003(E)
Subclause number
D IL AQL Performance
Conditions of test
and test of
requirements
or
IEC 60393-1
(see NOTE 1)
(see NOTE 2) (see NOTE 1)
(see NOTE 1) ND
Subgroup B2 ND S-2 1,5 %
2.1.3.4 of IEC 60393-6 Aging (if applicable)
Solderability
Solder bath method As in 2.1.3.4 of IEC 60393-6
Temperature: 235 °C ± 5 °C
Duration: 2 s ± 0,5 s
Solvent: Legible marking
4.45 Solvent Solvent temperature: .
resistance of the Method 1
marking Rubbing material: cotton
(if applicable) wool
Recovery: .
NOTE 1  Subclause numbers of tests and performance requirements refer to IEC 60393-1, except for some
severities for environmental tests and limits of change in resistance or output ratio, which have to be taken from
the relevant clauses of IEC 60393-6.
NOTE 2  Inspection levels and AQL´s are selected from IEC 60410.
NOTE 3  In this Table: D = destructive
ND = non-destructive
IL = inspection level
See IEC 60410
AQL = acceptable quality level 

60393-6-1  IEC:2003(E) – 9 –
Table 3 – Test schedule for quality conformance inspection
Subclause number D Conditions of test Sample size Performance
and test & criterion of requirements
or
of IEC 60393-1 acceptability
ND
(see NOTE 1) (see NOTE 1) (see NOTE 2) (see NOTE 1)
pn c
GROUP C INSPECTION
(periodic)
Subgroup C1 ND 38 1
ΔR
4.14 Temperature Lower category t
...