EN 61076-4-104:1999

SLOVENSKI STANDARD
01-september-2002
Connectors with assessed quality, for use in d.c., low frequency analogue and
digital high-speed data applications - Part 4-104: Printed board with assessed
quality - Detail specification for two-part modular connectors, basic grid of 2,0
mm, with terminations on a multiple grid of 0,5 mm (IEC 61076-4-104:1999)
Connectors for use in d.c. low-frequency analogue and digital high speed data
applications -- Part 4-104: Printed board connectors with assessed quality - Detail
specification for two-part modular connectors, basic grid of 2,0 mm, with terminations on
a multiple grid of 0,5 mm
Steckverbinder für Gleichspannungs- und Niederfrequenzanwendungen sowie digitale
Anwendungen mit hoher Übertragungsrate -- Teil 4-104: Steckverbinder für gedruckte
Schaltungen mit bewerteter Qualität - Bauartspezifikation für indirekte, modulare
Steckverbinder, Raster 2,0 mm, mit Anschlüssen für das Vielfache des Rasters 0,5 mm
Connecteurs pour applications analogiques en courant continu et à basse fréquence et
pour applications numériques utilisant des débits élevés pour le transfert des données --
Partie 4-104: Connecteurs pour cartes imprimées sous assurance de la qualité -
Spécification particulière pour modules de connecteurs en deux parties, au pas de base
de 2,0 mm avec des connexions au pas multiple de 0,5 mm
Ta slovenski standard je istoveten z: EN 61076-4-104:1999
ICS:
31.220.10 9WLþLLQYWLþQLFHNRQHNWRUML Plug-and-socket devices.
Connectors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME
CEI
INTERNATIONALE
IEC
61076-4-104
INTERNATIONAL
QC 480301XX0005
STANDARD
Première édition
First edition
1999-03
Connecteurs pour applications analogiques
en courant continu et à basse fréquence et pour
applications numériques utilisant des débits élevés
pour le transfert des données –
Partie 4-104:
Connecteurs pour cartes imprimées
sous assurance de la qualité –
Spécification particulière pour modules de connecteurs
en deux parties, au pas de base de 2,0 mm
avec des connexions au pas multiple de 0,5 mm
Connectors for use in d.c., low frequency analogue
and digital high speed data applications –
Part 4-104:
Printed board connectors with assessed quality –
Detail specification for two-part modular connectors,
basic grid of 2,0 mm, with terminations
on a multiple grid of 0,5 mm
 IEC 1999 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
PRICE CODE XB
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

61076-4-104  IEC:1999 – 3 –
CONTENTS
Page
FOREWORD . 11
Clause
1 General data. 15
1.1 Recommended method of mounting . 15
1.1.1 Minimum and maximum number of contact cavities. 15
1.2 Ratings and characteristics . 15
1.3 Normative references. 17
1.4 Marking. 19
1.5 IEC type designation . 19
1.6 Ordering information. 21
2 Technical information. 21
2.1 Definitions. 21
2.2 Survey of styles and variants. 23
2.3 Information on application . 25
2.3.1 Complete connectors (pairs) . 25
2.3.2 Fixed board connectors . 27
2.3.3 Free board connectors. 27
2.3.4 Accessories. 27
2.3.5 Shielding and grounding . 29
2.3.6 Basic types of termination. 29
2.4 Contact arrangements. 31
3 Dimensional information. 31
3.1 General. 31
3.2 Isometric view and common features (see figure 2) . 33
3.2.1 Isometric view . 35
3.2.2 Reference system. 37
3.2.3 Height dimensions. 37
3.2.4 Width dimensions. 39
3.2.5 Depth dimensions. 43
3.3 Engagement (mating) information. 45
3.3.1 Engaging (mating) direction . 45
3.3.2 Permissible displacement perpendicular to the engaging (mating) direction 47
3.3.3 Inclination. 49
3.4 Fixed board connectors. 51
3.4.1 Fixed board connector module, housing dimensions. 51
3.4.2 Fixed board connector module dimensions. 55
3.4.3 Terminations . 61
3.5 Free board connectors . 61
3.5.1 Free board connector module, housing dimensions . 61
3.5.2 Free board connector module dimensions. 63
3.5.3 Terminations . 69

61076-4-104  IEC:1999 – 5 –
Clause Page
3.6 Accessories. 71
3.6.1 Coding system, style YV . 71
3.6.2 Special contacts, styles ZX, ZY and ZZ . 75
3.7 Mounting information for fixed board connectors . 77
3.7.1 Fixed board connector module housing, dimensions and positions
of locating pegs, solder termination. 77
3.7.2 Fixed board connector modules, signal and power contacts,
solder termination. 81
3.7.3 Fixed board connector module, special contacts, solder termination. 85
3.7.4 Fixed board connector modules, signal and power contacts, press-in
termination . 87
3.8 Mounting information for free board connectors . 93
3.8.1 Free board connector module housing, dimensions and position
of location pegs and fixing studs . 93
3.8.2 Free board connector modules, signal and power contacts,
solder termination. 97
3.8.3 Free board connector module, special contacts, solder termination . 101
3.8.4 Free board connector modules, signal and power contacts, press-in
termination . 103
3.9 Gauges. 105
3.9.1 Sizing gauges and retention force gauges. 105
4 Characteristics. 107
4.1 Climatic categories. 107
4.2 Electrical. 107
4.2.1 Creepage and clearance distances . 107
4.2.2 Voltage proof. 107
4.2.3 Current carrying capacity . 109
4.2.4 Initial contact resistance . 109
4.2.5 Initial insulation resistance. 109
4.3 Mechanical. 111
4.3.1 Mechanical operation. 111
4.3.2 Insertion and withdrawal forces. 111
4.3.3 Contact retention in insert. 111
4.3.4 Static load, axial . 111
5 Test schedule. 113
5.1 General. 113
5.1.1 Arrangement for contact resistance measurement. 115
5.1.2 Mounting arrangement for dynamic stress tests . 115
5.1.3 Arrangement for testing static load, axial . 115
5.1.4 Wiring of specimens . 117
5.1.5 Arrangement for voltage proof . 117
5.1.6 Arrangement for flammability (needle flame) test . 117
5.2 Test schedule tables . 119
5.2.1 Basic test schedule. 119
5.2.2 Full test schedule . 119

61076-4-104  IEC:1999 – 7 –
Clause Page
6 Quality assessment procedures. 139
6.1 Qualification approval testing . 139
6.1.1 Method 1. 139
6.1.2 Method 2. 139
6.2 Quality conformance inspection. 141
6.2.1 Lot-by-lot tests. 141
6.2.2 Periodic tests . 141
6.3 Delayed delivery, re-inspection. 143
Tables
1 Number of contact cavities. 15
2 Styles and variants . 23
3 Basic types of termination . 29
4 Contact loading. 31
5 Contact level and rows. 31
6 Isometric view and common features . 33
7 Height dimensions . 37
8 Width dimensions as in figures 4 and 5 . 39
9 Depth dimensions . 43
10 Contact length per contact level . 45
11 Fixed board connector module width dimensions. 55
12 Free connector dimensions of figure 15. 61
13 Survey of special contacts, 4,8 mm diameter. 75
14 Fixed board connector, mounting width dimensions. 79
15 Solder post lengths . 83
16 Press-in post lengths (after assembly) . 91
17 Press-in hole dimensions . 91
18 Length of fixing studs and board milled-down dimensions. 97
19 Dimensions of gauges . 107
20 Performance levels . 107
21 Creepage and clearance distances . 107
22 Initial contact resistance, maximum. 109
23 Mechanical operations . 111
24 Insertion and withdrawal forces . 111
25 Number of test specimens . 113
26 Test group P. 119
27 Test group AP. 121
28 Test group BP. 127
29 Test group CP . 131
30 Test group DP . 133
31 Test group EP. 135
32 Test group FP. 137
33 Qualification approval testing, method 1. 139
34 Lot-by-lot tests. 141
35 Periodic tests. 143
36 Re-inspection . 143

61076-4-104  IEC:1999 – 9 –
Figures
1 Overall length(s) of complete connectors . 27
2 Isometric view. 35
3 Height dimensions . 37
4 Width dimensions – Housing shape 1. 39
5 Width dimensions – Housing shape 2. 41
6 Depth dimensions . 43
7 Engaging (mating) direction . 45
8 Housing shapes 1 and 2. 47
9 Inclination . 49
10 Dimensions of fixed connector module housings, styles AD, AE, DD, DE, GD and GE 51
11 Dimensions of fixed connector module housings, styles BD, BE, ED, EE, HD and HE 53
12 Dimensions of fixed signal connector module, style AE. 57
13 Dimensions of fixed power module, style DE . 59
14 Dimensions of fixed special connector module, style GD . 61
15 Dimensions of free board connector module housings, styles PD, PE, RD, RE,
TD and TE . 63
16 Position of contact point in the female contact area . 65
17 Dimensions of free signal connector module, style PE. 65
18 Dimensions of free power module, style RE. 67
19 Dimensions of free special connector module, style TD . 69
20 Application of an optional coding system . 71
21 Example of contact sequencing versus optional coding . 71
22 Optional coding keys. 73
23 Housing dimensions and positions of locating pegs for all module styles with solder
terminations. 77
24 Recommended printed board layout for solder to board version, component side. 79
25 Dimensions of fixed connector modules, signal and power contacts
with solder termination. 81
26 Recommended printed board layout for solder to board version, component side. 83
27 Dimensions of a fixed board connector module, special contacts, solder termination . 85
28 Recommended printed board layout for solder to board version, component side. 85
29 Dimensions of fixed board connector module, signal and power contacts,
press-in termination . 89
30 Recommended printed board layout for press-in termination, component side . 91
31 Mounting information of free board connector module housing, dimensions
and position of locating pegs and fixing studs. 95
32 Recommended printed board layout, component side. 97
33 Mounting for free board connector module, signal and power contacts,
solder termination . 99
34 Recommended printed board layout for solder to board version, component side. 99
35 Mounting for free board connector module, special contacts, solder termination . 101
36 Recommended printed board layout for solder to board version, component side. 101
37 Mounting for free board connector module, signal and power contacts,
press-in termination . 103
38 Recommended printed board layout for press-in termination, component side . 105
39 Sizing and retention force gauges . 105
40 Current carrying capacity . 109
41 Arrangement for contact resistance measurement. 115
42 Arrangement for dynamic stress test . 115
43 Arrangement for voltage proof test . 117
44 Arrangement for needle flame flammability test . 117

61076-4-104  IEC:1999 – 11 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
CONNECTORS FOR USE IN DC, LOW FREQUENCY ANALOGUE
AND DIGITAL HIGH SPEED DATA APPLICATIONS –
Part 4-104: Printed board connectors with assessed quality –
Detail specification for two-part modular connectors, basic grid of 2,0 mm,
with terminations on a multiple grid of 0,5 mm
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 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 61076-4-104 has been prepared by subcommittee 48B: Connectors,
of IEC technical committee 48: Electromechanical components and mechanical structures for
electronic equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
48B/745/FDIS 48B/759/RVD
Full information for the approval of this standard can be found in the report on voting indicated
in the above table.
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated when a new edition is prepared.
The QC number that appears on the front of cover of this publication is the specification
number of the IEC Quality Assessment System for Electronic Components (IECQ).

61076-4-104  IEC:1999 – 13 –
CONNECTORS FOR USE IN DC, LOW FREQUENCY ANALOGUE
AND DIGITAL HIGH SPEED DATA APPLICATIONS –
Part 4-104: Printed board connectors with assessed quality –
Detail specification for two-part modular connectors, basic grid of 2,0 mm,
with terminations on a multiple grid of 0,5 mm
IEC SC 48B: CONNECTORS IEC 61076-4-104
Specification available from: IEC Central Office or from the addresses
shown on the inside cover QC 480301XX0005
[Electronic components of assessed quality]
DETAIL SPECIFICATION in accordance with IEC 61076-1:1995. IEC 61076-4-001
See 3.2.1 for isometric view
Two-part modular connectors, for
printed boards and backplanes,
See 3.4, 3.5 and 3.6 for dimensions
basic grid 2,0 mm, with terminations
on a multiple grid of 0,5 mm
Stackable connector modules and
multimodules with n × 12 mm
lengths and in four or more row
configuration, with optional coding
and special contacts
Performance level(s): 1, 2 and 3
Grid 2 mm × 2 mm
Assessment levels: A and G
Combination of
performance levels
and assessment
levels:
1G, 2A, 2G and 3A
n × 12
IEC  156/99
Information on the availability of components qualified to this detail specification
is given in the qualified products list.

61076-4-104  IEC:1999 – 15 –
1 General data
1.1 Recommended method of mounting
A complete connector consists of one or more connector modules or multimodules which are
mounted stackable to each other, without the loss of contact positions.
Free board connector modules are mounted on the edge of the printed board and have female
contacts with right-angle solder or press-in terminations.
Fixed connector modules are mounted on the backplane and have male contacts with straight
solder or press-in terminations, with optional rear plug-up possibilities.
1.1.1 Minimum and maximum number of contact cavities
The connector modules and multimodules provide four or more rows, cavities for signal
contacts that can be fully or partially loaded, cavities with power contacts that are always fully
loaded.
The connector modules featuring cavities for special contacts are single-row, which can be
individually loaded.
The possible number of contact cavities per connector module and multimodule are given in
table 1.
For contact arrangements, see 2.4.
Table 1 – Number of contact cavities
Description Number of Number of contact cavities per module size
1)
of cavities cavity rows
12 mm 24 mm 48 mm 96 mm
signal 4 24 48 96 192
signal 5 30 60 120 240
power 4 8
power 5 10
special 1 1 2
under
preparation
1)
Larger (monobloc) module sizes are under consideration.
1.2 Ratings and characteristics
Rated voltage: 500 V r.m.s
Current rating at 70 °C: 1 A (all signal contacts)
2,75 A (all power contacts)
Insulation resistance: 5 × 10 MΩ min., initial
Climatic categories: PL1: 55/125/56
PL2: 25/125/21
PL3: 25/085/00
Printed board thickness: 1,4 mm min.
Contact spacing: 2,0 mm, based upon a multiple mounting and reference grid of
0,5 mm, according to IEC 60917

61076-4-104  IEC:1999 – 17 –
1.3 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61076. At the time of publication, the editions indicated
were valid. All normative documents are subject to revision, and parties to agreements based
on this part of IEC 61076 are encouraged to investigate the possibility of applying the most
recent editions of the normative documents indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 60068-1:1988, Environmental testing – Part 1: General and guidance
IEC 60352-5:1995, Solderless connections – Part 5: Solderless press-in connections. General
requirements, test methods and practical guidance
IEC 60410:1973, Sampling plans and procedures for inspection by attributes
IEC 60512-2:1985, Electromechanical components for electronic equipment – Basic testing
procedures and measuring methods – Part 2: General examination, electrical continuity and
contact resistance tests, insulation tests and voltage stress tests
IEC 60512-3:1976, Electromechanical components for electronic equipment – Basic testing
procedures and measuring methods – Part 3: Current carrying capacity tests
IEC 60512-4:1976, Electromechanical components for electronic equipment – Basic testing
procedures and measuring methods – Part 4: Dynamic stress tests
IEC 60512-5:1992, Electromechanical components for electronic equipment – Basic testing
procedures and measuring methods – Part 5: Impact tests (free components), static load tests
(fixed components), endurance tests and overload tests
IEC 60512-6:1984, Electromechanical components for electronic equipment – Basic testing
procedures and measuring methods – Part 6: Climatic tests and soldering tests
IEC 60512-7:1993, Electromechanical components for electronic equipment – Basic testing
procedures and measuring methods – Part 7: Mechanical operating tests and sealing tests
IEC 60512-8:1993, Electromechanical components for electronic equipment – Basic testing
procedures and measuring methods – Part 8: Connector tests (mechanical) and mechanical
tests on contacts and terminations
IEC 60512-9:1992, Electromechanical components for electronic equipment – Basic testing
procedures and measuring methods – Part 9: Miscellaneous tests
IEC 60603-1:1991, Connectors for frequencies below 3 MHz for use with printed boards –
Part 1: Generic specification - General requirements and guide for the preparation of detail
specifications, with assessed quality
Amendment 1:1992
IEC 60917:1988, Modular order for the development of mechanical structures for electronic
equipment practices
IEC 60917-2-2:1994, Modular order for the development of mechanical structures for electronic
equipment practices – Part 2: Sectional specification – Interface coordination dimensions for
the 25 mm equipment practice – Section 2: Detail specification – Dimensions for subracks,
chassis, backplanes, front panels and plug-in units

61076-4-104  IEC:1999 – 19 –
IEC 61076-1:1995, Connectors with assessed quality, for use in d.c., low-frequency analogue
and in digital high speed data applications – Part 1: Generic specification
IEC 61076-4:1995, Connectors with assessed quality, for use in d.c., low-frequency analogue
and in digital high speed data applications – Part 4: Sectional specification – Printed board
connectors
IEC 61076-4-001:1996, Connectors with assessed quality, for use in d.c., low-frequency
analogue and in digital high speed data applications – Part 4: Printed board connectors –
Section 001: Blank detail specification
ISO 468:1982, Surface roughness – Parameters, their values and general rules for specifying
requirements
1.4 Marking
The marking of the connector and the packaging shall be in accordance with 2.6 of IEC 61076-4.
1.5 IEC type designation
This designation shall be derived in accordance with 2.5 of IEC 61076-4:
IEC 61076-4-104 - L L N N N L N - NNNNN - L N N N L
Number A Letter denoting
of this the assessment
-
detail specification G level
Not applicable
Z
Letters denoting A A 1 Number
the styles of denoting
– – –
connectors according the
– – 2
to table 2, and for performance
– – –
individual contacts level
Z Z 3
Number of contact cavities for:
Housing only 000
001 00 Code denoting the
According to table 1 optional extensions to
---- 01
the type of termination
---- – –
in accordance
---- – –
with table 3
240 99
Letter denoting the basic type of
termination according to table 3
Letter denoting Female Crimp
FC
the type of MaleMI Insulation displacement
contacts Not applicableXP Press-in
Press-in plus rear plug-up
R
Code denoting the S Solder
contact loading, see table 4 Z Not applicable
Not applicable 00000
Digits denoting the contact 11111
arrangement, pin length per row,
-------
according to table 5
61076-4-104  IEC:1999 – 21 –
1.6 Ordering information
For ordering the connectors according to this detail specification, the type designation
described in 1.5 shall be used.
Example: IEC 61076-4-104-BD192M1-3111-P021A
Fixed board connector module, housing shape 2, 192 contact cavities, 4-row, male signal
contacts, fully loaded, row a: contact level 3; rows b, c and d: level 1; press-in terminations with
length of 11,8 mm, performance level 1, assessment level A.
2 Technical information
2.1 Definitions
For the purpose of this part of IEC 61076, the following definitions apply in addition to the
definitions given in IEC 61076-4:
chess pattern
contact arrangement where the loaded and unloaded positions alternate in rows and columns,
like the fields on a chessboard
coding key
device which engages with a keyway which, when mounted, prevents the improper mating
(engagement) of the connector halves at a distance less than the specified minimum contact
range
connector module
part containing all features of a complete connector which can be mounted in lengthwise series
to form a connector with a larger number of contact positions
contact levels
contacts may be provided with different mating lengths, which feature different point of mating
per specified contact length
contact range
minimum to maximum distance between the reference planes of the fixed and free connectors,
within which the specified contact resistance is met
contact sequence
sequence in which contacts with a different mating length are mating, with the purpose to
provide stepped insertion forces and/or stepped electrical continuity (e.g. first make/last break)
first make/last break contacts
contacts which provide different contact levels and sequencing, so that during connector
module engaging (insertion), at least one contact of the higher level shall connect before any
contact of a lower contact level; whilst during connector module disengaging (withdrawal), at
least one contact of the higher level will not disconnect before any contact of a lower contact
level
fixing studs
posts which form a part of the plastic housing of the connector which fit into corresponding
holes in the printed board to provide mechanical attachment to the board, which for example
may be deformed by applying a heated toolhead

61076-4-104  IEC:1999 – 23 –
location pegs
posts, protruding from the connector housing, fitting into corresponding holes in the printed
board or backplane, preventing a wrong assembly and giving an accurate position
multimodule
connector module with a multiple length of the smallest module
rear plug-up
connecting of the free connector to termination posts of the fixed board connector, which
protrude from the backplane or the printed board
rear shroud
connector housing, mounted at the rear side of a backplane or printed board, using protruding
termination posts to form a fixed board connector thus providing rear plug-up connection
special contacts
contacts suitable for high current, high frequency, filter or fibre-optic applications, with a basic
diameter of 4,8 mm
stackable
way of mounting whereby connectors are positioned side-by-side or in end-to-end lengthwise
series, preferably without loss of contact positions
2.2 Survey of styles and variants
Styles are only defined as being styles of connector modules. Complete connectors can be
composed in many different ways, taking into account the information in 2.3 about the
application.
The different styles are listed in table 2.
Table 2 – Styles and variants
Number Style reference letter
Connector of contact Housing shape Housing shape Connector Style reference
description rows: 1 2 description letter
1) 1) 1)
45 45 45
Fixed board module, Free board module,
signal contacts AD AE BD BE signal PD PE
contacts
Fixed board module, Free board module,
power DD DE ED EE power RD RE
contacts contacts
Fixed board module, Free board module,
special GD GE HD HE special TD TE
2) 2) 2)
contacts contacts
Other styles Other styles
under under
consideration consideration
Individual ZX Power
Coding system YV special ZY R.F.
contacts ZZ F.O.
1)
Under consideration
2)
For information only
61076-4-104  IEC:1999 – 25 –
2.3 Information on application
This specification features a modular system of several styles conforming to table 2, in a
configuration of four or more rows of contacts.
These styles contain modules and multimodules for signal contacts, power contacts and
special contacts. The modules have a basic length of 12 mm, multimodules a length of a
multiple of 12 mm. Every style of module has all the features of a complete connector and can
be used on its own. An optional coding set may be mounted into the connector modules.
2.3.1 Complete connectors (pairs)
A complete connector is composed of one or more connector modules or multimodules which
are mounted end-to-end stackable. All styles of modules can be aligned at random, given that
similar row configurations and fixed modules of one housing shape are used.
For examples see figure 1.
Information on the contact arrangement (see 2.4), the coding devices (see 2.3.4.2) and the
contact sequencing and levels (see 3.3.1.1) should be taken into account.

61076-4-104  IEC:1999 – 27 –
2.3.2 Fixed board connectors
Fixed board connector modules with solder terminations fit only one way into the backplane or
printed board. Location pegs which form a part of the plastic module housing together with the
corresponding holes in the panel or board align modules and provide mechanical attachment to
the printed board during the soldering process (see also 3.7.1).
For multimodules not all location pegs are required, only the two placed in the outermost
positions. For modules with press-in termination, no locating pegs shall be present.
IEC  157/99
Figure 1 – Overall length(s) of complete connectors
2.3.3 Free board connectors
Free board connector modules are provided with location pegs and optional fixing studs for
fixation of the location in and strain relief to the printed board.
For dimensional information, see 3.8.1.
2.3.4 Accessories
2.3.4.1 Special contacts
Connector modules of several styles may be fitted with special contacts for high current, high
frequency, filter or fibre-optic applications, see 3.7.3 and 3.8.3.

61076-4-104  IEC:1999 – 29 –
The reference dimension of the mounting cavity of these contacts is 4,8 mm.
IEC standards for these contacts are under consideration.
A referencing survey of special contacts is provided in table 13.
2.3.4.2 Coding devices
For purposes of coding the connectors to be mated, a system of separate coding keys can be
provided which has to be mounted into the fixed and the free board mounted connector
modules.
For dimensional information, see 3.6.1.
2.3.5 Shielding and grounding
In regard to the possible application of the connector modules as described in this standard, in
high speed applications, additional connector styles, which provide grounding contacts, are
under consideration.
2.3.6 Basic types of termination
The basic types of termination are listed in table 3. Dimensional information is given in 3.7 for
fixed board connector modules, in 3.8 for free board mounted modules and in 3.6.2 for special
contact connector modules. For termination details, see also tables 15, 16 and 17.
Table 3 – Basic types of termination
Letter and number denoting the type of termination
Soldering S01 S02 S03
Termination for solder to printed Termination for solder to printed Termination for solder to printed
board with a thickness board with a thickness board with a thickness
according to table 15 according to table 15 according to table 15
Press-in P01 P02 P03
Press-in termination for a Press-in termination for a Press-in termination for a
compliance post length of compliance post length of compliance post length of 15,6
4,3 mm in a plated-through hole 11,8 mm in a plated-through mm in a plated-through hole
diameter of 0,65 mm – 0,80 mm hole diameter of 0,65 mm – diameter of 0,65 mm – 0,80 mm
0,80 mm
P04 P05 P06
Press-in termination for a Press-in termination for a Press-in termination for a
compliance post length of compliance post length of compliance post length of
13,6 mm in a plated-through 17,0 mm in a plated-through 4,3 mm in a plated-through hole
hole diameter of 0,65 mm – hole diameter of 0,65 mm – diameter of 0,52 mm – 0,57 mm
0,80 mm 0,80 mm
P07 P08 P09
Press-in termination for a Press-in termination for a Press-in termination for a
compliance post length of compliance post length of compliance post length of
4,3 mm in a plated-through hole 2,9 mm in a plated-through hole 2,9 mm in a plated-through hole
diameter of 0,57 mm – 0,65 mm diameter of 0,65 mm – 0,80 mm diameter of 0,52 mm – 0,57 mm
P10
Press-in termination for a
compliance post length of
2,9 mm in a plated-through hole
diameter of 0,57 mm – 0,65 mm
Z00
Not
applicable
Connector housing without
contacts
...