IEC 61811-55:2002

IEC 61811-55 ®
Edition 2.0 2002-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electromechanical all-or-nothing relays –
Part 55: Blank detail specification – Electromechanical all-or-nothing telecom
relays of assessed quality – Two change-over contacts, 11 mm × 7,5 mm (max.)
base
Relais électromécaniques de tout-ou-rien –
Partie 55: Spécification particulière cadre – Relais électromécaniques de tout-
ou-rien télécom soumis au régime d'assurance de la qualité – Deux contacts à
deux directions, surface d'encombrement de 11 mm × 7,5 mm (max.)
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IEC 61811-55 ®
Edition 2.0 2002-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electromechanical all-or-nothing relays –

Part 55: Blank detail specification – Electromechanical all-or-nothing telecom

relays of assessed quality – Two change-over contacts, 11 mm × 7,5 mm (max.)

base
Relais électromécaniques de tout-ou-rien –

Partie 55: Spécification particulière cadre – Relais électromécaniques de tout-

ou-rien télécom soumis au régime d'assurance de la qualité – Deux contacts à

deux directions, surface d'encombrement de 11 mm × 7,5 mm (max.)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 29.120.70 ISBN 978-2-8322-1511-1

– 2 – IEC 61811-55:2002 © IEC 2002
CONTENTS
FOREWORD . 3

1 General . 5
1.1 Scope . 5
1.2 Normative references . 5
1.3 Front page of detail specification . 7
2 Characteristic values of the relay . 9
2.1 General data . 9
2.2 Construction of IECQ type designation (ordering information) . 9
2.3 Coil data. 10
2.4 Contact data . 10
2.5 Mounting . 11
2.6 Environmental data . 11
2.7 Package of relays for automatic handling (if applicable) . 12
3 Qualification approval procedures . 12
4 Quality conformance inspection . 12
4.1 Formation of inspection lots . 12
4.2 Intervals between tests . 12
5 Marking and documentation . 12
5.1 Marking of the relay . 12
5.2 Marking of the package . 13
5.3 Documentation . 13
6 Annexes . 13
7 Tests . 13
7.1 Standard conditions for testing . 13
7.2 Mounting of test specimens during the test . 13
7.3 General conditions for testing . 13
8 Ordering information . 13
9 Relay reliability – Failure rate data (optional) . 13

Table 1 – Dielectric test voltages . 9
Table 2 – Coil data . 10
Table 3 – Loads, contact-circuit resistance limits, switching cycles and frequencies
for electrical endurance and overload tests . 10
Table 4 – Quality conformance inspection . 14-26
Table 5 – Qualification approval . 28-30
Table 6 – Industrial qualification . 30

INTERNATIONAL ELECTROTECHNICAL COMMISSION
––––––––––––
ELECTROMECHANICAL ALL-OR-NOTHING RELAYS –

Part 55: Blank detail specification –
Electromechanical all-or-nothing telecom relays of assessed quality –
Two change-over contacts, 11 mm × 7,5 mm (max.) base

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 61811-55 has been prepared by IEC technical committee 94:
All-or-nothing electrical relays.
This bilingual version (2014-04) corresponds to the English version, published in 2002-03.
This second edition of IEC 61811-55 cancels and replaces IEC/PAS 61811-55 published in 2000
and constitutes a technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
94/149/FDIS 94/163/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.
The French version of this standard has not been voted upon.
The QC number that appears on the front cover of this publication is the specification number
in the IEC Quality Assessment System for Electronic Components (IECQ).
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.

– 4 – IEC 61811-55:2002 © IEC 2002
The committee has decided that the contents of this publication will remain unchanged until 2007.
At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
The contents of the corrigendum of June 2002 have been included in this copy.

ELECTROMECHANICAL ALL-OR-NOTHING RELAYS –

Part 55: Blank detail specification –
Electromechanical all-or-nothing telecom relays of assessed quality –
Two change-over contacts, 11 mm × 7,5 mm (max.) base

1 General
1.1 Scope
This part of IEC 61811 is a blank detail specification applicable to electromechanical all-or-
nothing telecom relays of assessed quality. Relays according to this standard are provided for
the operation in telecommunication applications. However, as electromechanical all-or-nothing
relays, they are also suitable for particular industrial and other applications.
This standard selects from IEC 61810-7 and other sources the appropriate methods of test to be
used in detail specifications derived from this specification, and contains basic test schedules
to be used in the preparation of such specifications in accordance with IEC 61811-1.
Detailed test schedules are contained in the detail specifications supplementary to this
specification.
1.2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60068-1:1988, Environmental testing – Part 1: General and guidance
Amendment 1 (1992)
IEC 60068-2-17:1994, Environmental testing – Part 2: Tests: Test Q: Sealing
IEC 60068-2-20:1979, Environmental testing – Part 2: Tests: Test T: Soldering
Amendment 2 (1987)
IEC 60068-2-47:1999, Environmental testing – Part 2-47: Test methods – Mounting of
components, equipment and other articles for vibration, impact and similar dynamic tests
IEC 60255-14:1981, Electrical relays – Part 14: Endurance test for electrical relay contacts –
Preferred values for contact loads
IEC 60695-2-2:1991, Fire hazard testing – Part 2: Test methods – Section 2: Needle-flame test
IEC 61709:1996, Electronic components – Reliability – Reference conditions for failure rates
and stress models for conversion

– 6 – IEC 61811-55:2002 © IEC 2002
IEC 61810-7:1997, Electromechanical all-or-nothing relays – Part 7: Test and measurement
procedures
IEC 61811-1:1999, Electromechanical non-specified time all-or-nothing relays of assessed
quality – Part 1: Generic specification
IEC 61811-50:2002, Electromechanical all-or-nothing relays – Part 50: Sectional specification –
Electromechanical all-or-nothing telecom relays of assessed quality
QC 001002-2, Rules of Procedure of the IEC Quality Assessment System for Electronic
Components (IECQ) – Part 2: Documentation
QC 001002-3, Rules of Procedure of the IEC Quality Assessment System for Electronic
Components (IECQ) – Part 3: Approval procedures
QC 001005, Register of Firms, Products and Services approved under the IECQ System,
including ISO 9000
CECC 00802:1990, Guidance document: CECC Standard Method for the Specification of
Surface Mounting Components (SMDs) of Assessed Quality
(National authorized institutions will complete this clause by making reference to any documents
or specifications directly referred to in their national equivalent of this standard.)

1.3 Front page of detail specification
The layout of the front page of the detail specification is as follows.
(1) QC xxxxxx (2)
Issue:
Page 1 of
Electronic components of assessed (3) (4)
quality in accordance with:
IEC 61810-7:1997
IEC 61811-1:1999
IEC 61811-50:2002
Detail specification for electromechanical all-or-nothing telecom relays of assessed quality,
two change-over contacts, with 11 mm × 7,5 mm (max.) base
Type: . two change-over contacts (5)
Construction: dual-in-line, with 11 mm × 7,5 mm (max.) base, overall height of 6 mm max. (6)
plastic sealed case for assembling techniques of printed circuit boards using mounting
holes and soldering or for surface mounting technology (as applicable)
(7) Application: (8)
Dimensions in mm
11 max. 7,5 max. Relays according to this standard are provided for the
operation in telecommunication applications. However,
as printed circuit board relays, they are suitable also for
control or switching functions in particular industrial and
other applications.
Recommended
pad layout
3,2 2,2 2,2 5,08
1 max. 1 max.
Through-hole type
1 max.
1 max.
7,5 max.
11 max.
3,2 2,2 2,2 8,5 max.
3,2 2,2 2,2
1 max. 1 max.
11 max. 7,5 max. 1 max.
1 max.
3,2 2,22,2
2,8 min.
3,2 2,22,2
Coplanarity of SMT leads 0,1 mm
Surface mounting types
Latching
Monostable
(De-energized condition) (Reset condition)
+1 2 3 4 +1 2 3 4
-8 7 6
-8 7 6 5 5
Wiring diagram – Bottom view
IEC  631/02
NOTE Drawings are examples; the maximum outer
dimensions, the wiring diagram of coil relay, the
terminal arrangement and the same orientation of all
rectangular terminals are mandatory.
Coil data (9)
Rated voltages: 1,5 . 12 V d.c.
Rated power: 140 / 100 mW
(10)
Contact data
Change-over break-before-make contacts
Rated contact voltage: 120 V d.c. / 125 V a.c.
Rated contact current: 1 A max
Rated contact power: 30 W / 30 VA
Limiting continuous current: 1 A max
Component climatic category according to IEC 60068-1: 25/70/21 (11)
Temperature range – operating ambient temperature: –25 °C to +70 °C
– storage temperature: –40 °C to +85 °C
Information about manufacturers who have components qualified according to this detail specification is available in the
current QC 001005.
6 max. 6 max.
3,8 max. 6 max.
max.
2,5 min.
9,4 max.
7,5 max.
– 8 – IEC 61811-55:2002 © IEC 2002
Key to front page
The numbers between brackets of the front page correspond to the following indications which
should be given.
Identification of the detail specification
(1) The name of the national standards organization under whose authority the detail
specification is published and, if applicable, the organization from which the detail
specification is available.
(2) The IECQ symbol and the number allotted to the completed detail specification by
the IECQ secretariat.
(3) The number and the year of availability of the IEC standard concerning test and
measurement procedures for electromechanical all-or-nothing relays and/or sectional
specification; also national reference, if different.
(4) If different from the IECQ number, the national number of the detail specification,
date of issue and any further information required by the national system, together
with any amendment numbers.
Identification of the relay
(5) Type: monostable or bistable, non-polarized or polarized, two change-over contacts.
(6) Construction: sizes, for example dual-in-line, base and overall height, type of relay,
based upon environmental protection (RT III), mounting variants and other typical
construction details.
(7) An outline drawing with main dimensions which are of importance for
interchangeability, and/or reference to the appropriate national or international
document for outlines. Alternatively, this drawing may be given in an annex to the
detail specification, but (7) should always contain an illustration of the general outer
appearance of the component.
Location and dimensions of stand-offs (maximum relay height shall include stand-
offs), position of terminal No. 1 relative to the outside shape, acceptable offset of the
tip of a terminal relative to the nominal grid position, indication of the area on the top
of the relay housing to enable automatic mounting using aspirators, suitable hole
diameter for assembling on printed circuit board.
(8) Typical field of applications.
(9) Available rated coil voltages and rated power.
(10) Available contact arrangements, defined special contact materials and contact
voltage, current and power. The respective code digit for contact materials shall be
listed in an annex, if applicable.
(11) Component climatic category according to clause 8 and annex A of IEC 60068-1, and
temperature range.
2 Characteristic values of the relay
2.1 General data
– Thermal resistance: max. . K/W
– Contact application: CA 0, CA 1, and CA 2
– Relay mass: max. . g
– Finish of the terminals: presoldering; admissible non-presoldered part: max. 1 mm to
the stand-off plane, if applicable
– Insulation resistance: 1 000 MΩ min. at 500 V d.c. initial value
2 MΩ min. at 500 V d.c. after tests
– Dielectric strength: see table 1

Table 1 – Dielectric test voltages
Dielectric test Impulse voltage test
V a.c. min. V min. – pulse shape
Opened contact circuits 750 1 500 – 10/700 µs
Between adjacent contact circuits 1 000 1 500 – 10/700 µs
Coil to contact circuits 1 500 2 500 – 1,2/50 µs

2.2 Construction of IECQ type designation (ordering information)
Relay IECQ xxxxxx
X Y 9 Z
Denomination
IECQ detail specification number
Rated coil voltage (first letter of identification code of table 2)
Rated power (second letter of identification code of table 2)
Defined, special contact material (according to annex)
Special attributes and/or surface mounting type (according to annex)

The coding of the monostable or bistable relay type shall be combined with the rated power of
the coil, if applicable. The reference to two change-over contacts shall be given on the front
page of the specification.
Use code 0 as the last digit if no special attributes apply. If one of the attributes in the
example for a detail specification shall not be considered, the corresponding code number or
letter shall be deleted; there shall be no special marks or open space for non-applicable
attributes.
The manufacturer may use his own numbering system, provided that a conversion list with
the IECQ type designations and the manufacturer's part numbers is given in an annex to the
detail specification.
– 10 – IEC 61811-55:2002 © IEC 2002
2.3 Coil data
Table 2 – Coil data
Identifi- Rated Must operate Maximum Must release Rated
Coil Must not Must not
cation voltage voltage coil voltage power
Resistance operate release
code V V voltage V mW
voltage V voltage
Ω ± 10 %
at coil temperature of V at coil temperature
at coil at coil V at coil
at of
temperature temperature tempe-
of rature
of
of
2.4 Contact data
2.4.1 Electrical endurance and switching frequency
Contact failure: contact-circuit resistance of a closed contact higher than the value stated in

2.4.2, or resistance of an open contact circuit lower than 100 kΩ, both more than once per 10
cycles or for the minimum number of switching cycles stated, calculated for each single
contact; or a contact fault due to non-opening with a short circuit between break and make
contact (resistance value lower than 100 Ω), i.e. one contact fault is permissible for 100 000
switching cycles and seven contact faults are permissible for 700 000 switching cycles.
Example: at a given endurance of 10 operations, the total number of faults, as described
above, shall not exceed 10.
Table 3 – Loads, contact-circuit resistance limits, switching cycles and frequencies
for electrical endurance and overload tests
Loads Contact-circuit Number of switching Switching frequencies
resistance cycles min. cycles per s max.
Ω max.
Contact application 0 1 1 000 000 12,5
Resistive – max. contact 1 100 000 3
voltage/max. power
Resistive – max. contact 1 100 000 3
current/max. power
DC open-ended cable 1 1 000 000 12,5
Particular application-related,
if required
Overload 1 * 100 0,3
* Unless otherwise stated in the detail specification.

2.4.2 Static contact-circuit resistance
100 mΩ max. initial value at rated voltage;
1 Ω max. during/after electrical endurance, mechanical endurance and environmental
tests at rated voltage.
2.4.3 Mechanical endurance
10 min. switching cycles.
2.4.4 Timing (without suppression device)
– Operate time: max. 5 ms
– Release time: max. 5 ms
– Bounce time when the contacts are closing: max. 5 ms
– Bounce time when the contacts are opening: max. 3 ms
– Transfer time on operation and release (last break contact opens
before first make contact closes respectively last make contact
opens before first break contact closes – each contact monitored): min. 0,05 ms
2.5 Mounting
The relay terminals are designed to be directly soldered onto the printed circuit board using
conventional assembling techniques or for surface mounting technology (as applicable).
2.6 Environmental data
The relays shall withstand at least the following environmental stresses:

– shock, functional: 98,1 m/s (10 g) half-sine acceleration, 11 ms duration;
– shock, survival: 981 m/s (100 g) half-sine acceleration, 0,5 ms duration;

– vibration (sinusoidal): amplitude 0,75 mm or 98,1 m/s (10 g), 10 Hz to 500 Hz;
– mechanical robustness of terminals
• thrust: 1 N;
• bending: 2 bends;
– soldering
• if particular ageing is required, this shall be selected from procedure 1a, 1b, 2 or 3
of 4.2 of IEC 60068-2-20 and stated in the detail specification;
– through hole type:
• solderability at 235 °C : 2 s;
• resistance to soldering heat, terminal immersion time at 260 °C: 5 s;
– surface mounting type:
• class A1, 6.2 of CECC 00802 (i.e. 260 °C/5 s and 215 °C/40 s);
• category 3, 6.2 of CECC 00802 (i.e. vapour phase soldering or infrared soldering, if the
temperature stress is adequate);
– enclosure leakage rate: max. 100 Pa⋅cm /s;
– resistance to cleaning solvents when rubbed with
tissue paper
• demineralized or distilled water at 55 °C: 5 min;
– fire hazard, needle flame: min. 10 s.

– 12 – IEC 61811-55:2002 © IEC 2002
2.7 Package of relays for automatic handling (if applicable)
If stick magazines or tape and reel packaging for automatic handling (to facilitate automatic
relay insertion) are used, their outline drawing (profile and length), storage capacity and
possible marking shall be given in an annex.
3 Qualification approval procedures
– As stated in 3.1.4 a) of QC 001002-3, fixed sample.
– Sampling and test schedule are specified in table 5.
– The tests specified and their order are mandatory.
– Tests stated in table 6 are mandatory only if stated in the detail specification.
4 Quality conformance inspection
Quality conformance inspection contains the tests stated in table 4:
– groups A and B: lot-by-lot tests;
– group C: periodic tests.
Unless otherwise stated in this blank detail specification, all tests of table 4 are mandatory.
Where a subgroup contains cumulative tests, the order of the tests is mandatory. Specimens
subjected to tests denoted as destructive (D) shall not be released for delivery.
NOTE If a special level of AQL is required, the AQL value regarding subgroups A4, B1 and B2 in table 4 should
be provided between the manufacturer and user of a relay.
4.1 Formation of inspection lots
According to 3.2.3 of QC 001002-3, the basis for determination of sample size for the quality
conformance inspection is the relay quantity produced during one week.
4.2 Intervals between tests
– Subgroups A4, B1 and B2: minimum once a week.
– Subgroups C1 and C2: at least once a year.
– Subgroups C4 to C6: at least once every two years.
5 Marking and documentation
Relays and their package shall be marked as follows.
5.1 Marking of the relay
The marking shall be durable and easily legible, the following items shall be present:
a) Manufacturer's name, logo or trade mark;
b) Relay type and variant code;
c) Coded date of manufacture, in terms of year/week according to 1.5.3 of IEC 61811-50;
d) IECQ in letters or IECQ mark of conformity;
e) IECQ type designation (ordering information), if not implicit in b), see also 2.2;
f) Identification of terminal No. 1.
NOTE  IECQ type designation in item e) may be omitted in an unavoidable case.

5.2 Marking of the package
a) Manufacturer's name, logo or trade mark.
b) Relay type and variant code.
c) Manufacture’s batch identification code.
d) IECQ in letters or IECQ mark of conformity.
e) IECQ type designation (ordering information), if not implicit in b), see also 2.2.
f) Detail specification reference if not marked on the relay.
g) Quantity.
NOTE  IECQ type designation in item e) may be omitted in an unavoidable case.
5.3 Documentation
For each delivery, a declaration of conformity according to QC 001002-2 shall be added.
6 Annexes
Annexes may be added if necessary, for example to show more details on relay mounting,
terminal dimensions, etc.
7 Tests
7.1 Standard conditions for testing
If not otherwise stated, all tests shall be performed under standard conditions for testing
according to 3.5 of IEC 61810-7.
7.2 Mounting of test specimens during the test
The following indications shall apply for mechanical-dynamic tests (shock and vibration): the
relay shall be mounted by its normal mounting method to the test fixture where inherent
resonances have been minimized so as not to invalidate the test (see also IEC 60068-2-47).
7.3 General conditions for testing
Unless otherwise stated, the rated coil voltage specified in table 2 and its suitable polarity
(if applicable) shall be used for all tests and its application to the relay.
8 Ordering information
See 2.2.
9 Relay reliability – Failure rate data (optional)
The evaluation and indication of reliability data is not mandatory.
However, if required in a detail specification, this optional clause shall refer to, and be in line
with, clause 5 of IEC 61811-50 and give a concise description of the methods and the set of
parameters applied. Details shall be given in an appropriate annex to the detail specification,
preferably based upon the provisions of IEC 61709 as indicated in annex A of IEC 61811-50.

– 14 – IEC 61811-55:2002 © IEC 2002
Table 4 – Quality conformance inspection
Group A
Subgroup A0
For all tests in this subgroup: 100 % test. Discard all failed relays. Tests in this subgroup
shall be carried out as a screening or sorting function, possibly
on-line, prior to the formation of lots from which samples for
the other subgroups are taken. The lot shall be rejected in
case of a failure rate of more than 10 % cumulative.
Test Test Test conditions according to Performance
No. IEC 61810-7 requirements
A0 – 1 Coil resistance (ND) Subclause 3.8.1 Values according to table 2
A0 – 2 Dielectric test (ND) Subclause 3.9 No breakdown or flashover
Application points and test voltage: according to 2.1, Maximum leakage current:
table 1 of this specification 1 mA
Duration of test: 1 s
A0 – 3 Contact-circuit Subclause 3.12 Initial value according to 2.4.2
resistance, static (ND) for each contact closing
Application points: terminals of all closed contacts
Test voltage max.: 30 mV d.c. or a.c.
Test current max.: 10 mA
A0 – 4 Functional tests (ND) Subclause 3.13 Values according to table 2
Checking the relay function by
Order of steps for monostable non-polarized relays: monitoring the contacts
1) 1,5 × rated voltage for conditioning
2) zero voltage
3) must operate voltage
4) rated voltage
5) must not release voltage
6) must release voltage
Order of steps for other relay types:
analogous according to figures 2 to 5
One cycle
Contact voltage: max. 6 V
Mounting: optional
A0 – 5 Timing tests (ND) Subclause 3.14 Values according to 2.4.4
Coil voltage: rated voltage Checking of contact
sequencing by measuring the
Application points: all contacts transfer time (see 4.4, note 4
of IEC 61811-50)
Contact voltage: max. 6 V
Mounting: optional
A0 – 6 Sealing (ND) Value according to 2.6
Subclause 3.20.2
Procedure 1, 2 or 4 for RT III and RT IV

Table 4 (continued)
Subgroup A4 (period: inspection lot refers to the production volume of not more
than one week)
Test Test Test conditions according to IL AQL Performance
No. IEC 61810-7 requirements
1 Visual inspection – Subclause 3.6.4, items a) and b)  Marking as specified in 5.1
relay marking (ND)
2 Coil resistance (ND) Subclause 3.8.1  Values according to table 2
3 Contact-circuit Subclause 3.12  Initial value according to 2.4.2
resistance, static (ND) for each contact closing
Application points: terminals of all closed
contacts
Test voltage max.: 30 mV d.c. or a.c.
Test current max.: 10 mA
4 Functional tests (ND) Subclause 3.13 S4 1,0 Values according to table 2
Checking the relay function by
Order of steps:
monitoring the contacts
1) 1,5 × rated voltage for conditioning
2) zero voltage
3) must operate voltage
4) rated voltage
5) must not release voltage
6) must release voltage
One cycle
Contact voltage: max. 6 V
Mounting: optional
5 Timing tests (ND) Subclause 3.14  Values according to 2.4.4
Checking of contact sequencing
Coil voltage: rated voltage
by measuring the transfer time
Application points: all contacts
(see 4.4, note 4 of
Contact voltage: max. 6 V
IEC 61811-50)
Mounting: optional
6 Sealing (ND) Subclause 3.20  Value according to 2.6
Procedure 1, 2 or 4 for RT III and RT IV

– 16 – IEC 61811-55:2002 © IEC 2002
Table 4 (continued)
Group B
Subgroup B1 (period: inspection lot refers to the production volume of not more
than one week)
Test Test Test conditions according to IL AQL Performance
No. IEC 61810-7 requirements
7 Visual inspection – check Subclauses 3.6.1 and 3.6.4, items a) and d)  According to 2.7
of dimensions of stick
magazines (ND) *
8 Visual inspection – other Subclauses 3.6.1 and 3.6.4, items c) and d)  Presoldering of terminals shall
than marking, check of  encircle the terminals without
relay outside key – encapsulation  evidence of de-wetting or
dimensions (ND) – body  non-wetting; non-presoldered
– terminals S3 2,5 terminal part according to 2.1
– dimensions Dimensions according to
outline drawing on front
page (1.3). For the plug-in
capability of the relay on the
printed circuit board, a gauge
with the respective tolerances
shall be used.
9 Contact dynamic Subclause 3.50  No pulse detected shall exceed
dielectric test (ND)
80 µs
Contact voltage: 500 V d.c.
Test duration: 3 s or 10 s
10 Electrical endurance Subclause 3.30.5

miss-free acceptance
(ND) Coil voltage: rated voltage

Number of cycles per s: 10
Test duration: 1 h
No checking required during the test

Final measurements:
Test 3 – contact-circuit resistance
Values lower than 0,2 Ω
* Mandatory, if stated in the detail specification.
Subgroup B2 (period: inspection lot refers to the production volume of not more
than one week)
Test Test Test conditions according to IL AQ Performance
No. IEC 61810-7 L requirements
11 Solderability (D) Through-hole type: S3 2,5 When inspected with a magnifying
lens, the dipped surface shall be

Subclause 3.25.3, test 1 95 % covered with new solder
coating, the remaining 5 % may

Test method 1 (test Ta, method 1) contain only small pinholes
Number of terminals to be tested: all (magnification of the lens:
Temperature: (235 ± 5) °C 4 to 10 times)

Duration: (2 ± 0,5) s
Immersion: up to 1,5 mm from
body
Surface mounting type:
Subclause 3.25.3, test 3
Temperature: (215 ± 3) °C
Duration of the immersion: (3 ± 0,3) s

Final measurements:
M*
Test 17 – insulation resistance Value according to 2.1
M* if not tested in subgroup C1.

Table 4 (continued)
Group C
Subgroup C1 (period: one year)
Test Test Test conditions according to Sample Acceptable Performance
No. IEC 61810-7 size number of requirements
defectives
11a Solderability (D) Through-hole type: S3 2,5 When inspected with a
magnifying lens the dipped
Subclause 3.25.3, test 1 surface shall be 95 %

covered with new solder
Test method 1 (test Ta, method 1) coating, the remaining 5 %

Number of terminals to be tested: all may contain only small

Temperature: (235 ± 5) °C pinholes (magnification of the
Duration: (2 ± 0,5) s lens: 4 to 10 times)

Immersion: up to 1,5 mm from body

Surface mounting type:
Subclause 3.25.3, test 3
Temperature: (215 ± 3) °C
M*
Duration of the immersion: (3 ± 0,3) s

Final measurements:
Test 17 – insulation resistance
Value according to 2.1
12 Electrical Subclause 3.30.3, method 1 20 0 Number of cycles according
endurance to table 3
cable load (D) Contact load: open-end cable, 10 m Contact failure according to
telephony cable n × 4 × 0,6 mm, one 2.4.1
wire connected to the contact tested and

the other three wires to ground, 48 V d.c.
according to 4.5 of IEC 60255-14
Number of contacts loaded/tested:
one change-over contact
Coil voltage: rated voltage
Number of cycles per s: 12,5 max.
Duty factor: 1:1
Ambient temperature: 70 °C
Test contact voltage: max. 6 V test
Test contact current: max. 10 mA
Monitoring period: 70 ms after coil
(de)-energization
Final measurements:
Value according to 2.4.2
Test 3 – contact-circuit resistance
Test 4 – functional tests Values according to table 2 at
23 °C
Checking the relay function
by monitoring the contacts
Test 5 – timing tests Values according to 2.4.4
Test 15 – dielectric test No breakdown or flashover
Maximum leakage current:
1 mA
M* for relays manufactured with automatic facilities only, if not tested in subgroup B2 and if stated in detail specification.

– 18 – IEC 61811-55:2002 © IEC 2002
Table 4 (continued)
Subgroup C1 (concluded)
Test Test Test conditions according to Sample Acceptable Performance
No. IEC 61810-7 size number of requirements
defectives
13 Electrical Subclause 3.30 20 0 Number of cycles according
endurance to table 3
contact Number of contacts loaded/tested: Contact failure according to
application 0 one change- 2.4.1
(D) over contact
Coil voltage: rated voltage
Number of cycles per s: 12,5 max.
Duty factor: 1:1
Ambient temperature: 70 °C
Test contact voltage: max. 30 mV
Test contact current: max. 10 mA

Final measurements:
Test 3 – contact-circuit resistance Value according to 2.4.2
Test 4 – functional tests Values according to table 2 at
23 °C
Checking the relay function
by monitoring the contacts
Test 5 – timing tests Values according to 2.4.4
Test 15 – dielectric test No breakdown or flashover
Maximum leakage current:
1 mA
14 Electrical Subclause 3.30.3 method 1 20 0 Number of cycles according
endurance to table 3
particular Contact load and further conditions as Contact failure according to
application specified in detail specification 2.4.1
related Contact voltage: rated voltage
condition if Number of cycles per s: 3
required (D) Duty factor: 1:1
Ambient temperature: °C
Test contact voltage: max. 6 V
Test contact current: max. 10 mA

Final measurements:
Test 3 – contact-circuit resistance Value according to 2.4.2
Test 4 – functional tests Values according to table 2 at
23 °C
Checking the relay function
by monitoring the contacts
Test 5 – timing tests Values according to 2.4.4
No breakdown or flashover
Test 15 – dielectric test
Maximum leakage current:
1 mA
Table 4 (continued)
Subgroup C2 (period: one year)
Test Test Test conditions according to Sample Acceptable Performance
No. IEC 61810-7 size number of requirements
defectives
15 Dielectric test Subclause 3.9 20 0 No breakdown or flashover
(ND) Maximum leakage current:
Application points and test voltage: 1 mA
according to 2.1, table 1 of this
specification (±15 V)
Duration of test: 60 s
16 Impulse voltage Subclause 3.10 5 0
test (ND)
Application points and test voltage:
according to 2.1, table 1 of this
specification
Consecutive pulses with the polarity
reversed
Frequency:       2 or 4 pulses/min
Total number of pulses: 6
Final measurements:
Test 3 – contact-circuit resistance Value according to 2.4.2
Test 4 – functional tests Values according to table 2
at 23 °C
Checking the relay function
by monitoring the contacts
Test 17 – insulation resistance Value according to 2.1
17 Insulation Subclause 3.11 20 0 Value according to 2.1
resistance
(ND) Application points: all terminals as
specified in
subclause 3.11.2
Test voltage: according to 2.1 of
this specification
Duration of test: 60 s or when steady
value has b
...