31.220.10 - Plug-and-socket devices. Connectors
ICS 31.220.10 Details
Plug-and-socket devices. Connectors
Steckvorrichtungen. Verbindungselemente
Fiches. Connecteurs
Vtiči in vtičnice, konektorji
General Information
Frequently Asked Questions
ICS 31.220.10 is a classification code in the International Classification for Standards (ICS) system. It covers "Plug-and-socket devices. Connectors". The ICS is a hierarchical classification system used to organize international, regional, and national standards, facilitating the search and identification of standards across different fields.
There are 1048 standards classified under ICS 31.220.10 (Plug-and-socket devices. Connectors). These standards are published by international and regional standardization bodies including ISO, IEC, CEN, CENELEC, and ETSI.
The International Classification for Standards (ICS) is a hierarchical classification system maintained by ISO to organize standards and related documents. It uses a three-level structure with field (2 digits), group (3 digits), and sub-group (2 digits) codes. The ICS helps users find standards by subject area and enables statistical analysis of standards development activities.
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This part of IEC 61076 describes 3-way to 12-way circular connectors with M8 screw-locking or with nominal ∅ 8 mm snap-locking, for connection of automation devices, for signal and power transmission up to 50 V AC / 60 V DC rated voltage and up to 4 A rated current.
These connectors are available as fixed or free connectors, either rewirable or non-rewirable. Male connectors have round contacts ∅ 0,48 mm, ∅ 0,6 mm, ∅ 0,7 mm and ∅ 1,0 mm, depending on the number of ways and coding, with all contacts being of the same size.
The different codings prevent the mating of differently coded male and female connectors.
NOTE M8 is the dimension of the thread of the screw locking mechanism of these circular connectors.
- Standard66 pagesEnglish languagee-Library read for1 day
This document specifies the characteristics of the jam-nut mounted receptacles of the family of bayonet coupling circular connectors, intended for use in an operating temperature range of –65 °C to 175 °C or 200 °C continuous. It is applicable to models specified in Table 4. For contacts, filler plugs and rear accessories associated with this receptacle, see EN 3646-002. For plugs and protective covers, see EN 3646-008 and EN 3646-009 respectively.
- Standard10 pagesEnglish languagee-Library read for1 day
This document specifies the performances and contact arrangements groups for bayonet coupling circular connectors, intended for use in an operating temperature range of −65 °C to 175 °C or 200 °C continuous.
- Standard20 pagesEnglish languagee-Library read for1 day
This document specifies the characteristics of hermetic jam-nut mounted receptacles in the family of bayonet coupling circular connectors, intended for use in an operating temperature range of – 65 °C to 175 °C or 200 °C continuous.
It is applicable to models specified in Table 4.
For plugs and protective covers, see EN 3646-008 and EN 3646-009 respectively.
- Standard10 pagesEnglish languagee-Library read for1 day
This document specifies the male coding and attachment system for mounting on fixed housing in the family of rectangular electrical connectors with sealed and non-sealed rear, plastic housing, locking device, for operating temperatures from −55 °C to 175 °C.
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IEC 61076-2-104:2026 This part of IEC 61076 describes 3-way to 12-way circular connectors with M8 screw-locking or with nominal Æ 8 mm snap-locking, for connection of automation devices, for signal and power transmission up to 50 V AC / 60 V DC rated voltage and up to 4 A rated current.
- Standard66 pagesEnglish languagee-Library read for1 day
This document specifies the characteristics of square flange mounted receptacles with integrated accessory in the family of circular electrical connectors coupled by threaded ring.
It is applicable to classes specified in Table 3.
For contacts and filler plugs associated with this receptacle, see EN 2997 002. For plugs, see EN 2997 008 and EN 2997 016 and for protective covers, see EN 2997 009.
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This part of IEC 60352 is applicable to spring clamp connections made with stripped wire of the following types and sizes according to IEC 60228 or IEC 60189-3, without further preparation (later described “unprepared”):
– solid conductors (e.g. class 1 of IEC 60228) of 0,32 mm to 3,7 mm nominal diameter (0,08 mm2 to 10 mm2 cross-section), or
– stranded conductors (e.g. class 2 of IEC 60228) of 0,08 mm2 to 10 mm2 cross-section, or
– flexible conductors (e.g. class 5 or 6 of IEC 60228) of 0,08 mm2 to 10 mm2 cross-section, for use in electrical and electronic equipment and components.
Information on materials and data from industrial experience is included in addition to the test procedures to provide electrically stable connections under prescribed environmental conditions.
The object of this document is to determine the suitability of spring clamp connections under specified mechanical, electrical and atmospheric conditions.
NOTE IEC Guide 109 advocates the need to minimize the impact of a product on the natural environment throughout the product life cycle. It is understood that some of the materials permitted in this document can have a negative environmental impact. As technological advances lead to acceptable alternatives for these materials, they will be
eliminated from this document.
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This part of IEC 61076-2 describes 4- to 6-way circular connectors with M12 screw-locking with current ratings 8, 12 or 16 A per contact and voltage ratings of 50 V AC / 60 V DC or 630 V according to their coding, that are typically used for power supply and power applications in industrial premises.
These connectors consist of both fixed and free connectors, either rewirable or non-rewirable.
Male connectors have round contacts Ø1,0 mm and Ø1,5 mm.
The different codings provided by this document prevent the mating of differently coded male or female connectors to any other similarly sized interfaces, covered by other standards and the cross-mating between the different codings provided by this document.
NOTE 1 M12 is the dimension of the thread of the screw locking mechanism of these circular connectors.
NOTE 2 Several other IEC standards are available covering additional styles of circular connectors with M12 × 1 screw-locking, see Bibliography.
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IEC 60352-7:20205 is applicable to spring clamp connections made with stripped wire of the following types and sizes according to IEC 60228 or IEC 60189-3, without further preparation.
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IEC 61076-2-104:2026 This part of IEC 61076 describes 3-way to 12-way circular connectors with M8 screw-locking or with nominal Æ 8 mm snap-locking, for connection of automation devices, for signal and power transmission up to 50 V AC / 60 V DC rated voltage and up to 4 A rated current.
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This part of IEC 61076 establishes uniform specifications and technical information for circular connectors. This document is to be used in conjunction with the generic specification IEC 61076-1 for product requirements as the basis for preparation of detail product specifications for circular connectors.
NOTE The quality assessment requirements for connectors whose product requirements are given in IEC 61076 series are detailed in IEC 62197-1. This can be used as the basis for preparation of detail quality assessment specifications for circular connectors.
In the event of conflict between this sectional product specification and the detail product specification, it is intended that the requirements of the detail product specification prevail.
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IEC 61076-2-111:2025 This part of IEC 61076‑2 describes 4- to 6-way circular connectors with M12 screw-locking with current ratings 8, 12 or 16 A per contact and voltage ratings of 50 V AC / 60 V or 630 V according to their coding, that are typically used for power supply and power applications in industrial premises.
- Standard74 pagesEnglish languagee-Library read for1 day
IEC 61076-2:2025 establishes uniform specifications and technical information for circular connectors.
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IEC 60352-7:20205 is applicable to spring clamp connections made with stripped wire of the following types and sizes according to IEC 60228 or IEC 60189-3, without further preparation.
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IEC 61076-2-111:2025 This part of IEC 61076‑2 describes 4- to 6-way circular connectors with M12 screw-locking with current ratings 8, 12 or 16 A per contact and voltage ratings of 50 V AC / 60 V or 630 V according to their coding, that are typically used for power supply and power applications in industrial premises.
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IEC 61076-2:2025 establishes uniform specifications and technical information for circular connectors.
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IEC 63171:2025 is the general requirements and general tests part (general specification) of the whole IEC 63171 series, a set of International Standards covering shielded or unshielded free and fixed connectors for balanced single-pair data transmission with current carrying capacity. It provides the signal integrity requirements, common to the whole series.
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IEC 63171:2025 is the general requirements and general tests part (general specification) of the whole IEC 63171 series, a set of International Standards covering shielded or unshielded free and fixed connectors for balanced single-pair data transmission with current carrying capacity. It provides the signal integrity requirements, common to the whole series.
- Standard46 pagesEnglish languagee-Library read for1 day
- Amendment6 pagesEnglish languagee-Library read for1 day
IEC 63171:2025 is the general requirements and general tests part (general specification) of the whole IEC 63171 series, a set of International Standards covering shielded or unshielded free and fixed connectors for balanced single-pair data transmission with current carrying capacity. It provides the signal integrity requirements, common to the whole series.
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IEC 60512-99-002:2021 is used for the assessment of connectors within the scope of SC 48B that are used in twisted pair communication cabling with remote power, such as ISO;IEC 11801 1 Class D, or better, balanced cabling in support of IEEE 802.3btTM (Power over Ethernet, supporting up to 90 W from the power sourcing equipment).
The object of this document is to detail a test schedule to determine the ability of sets of connectors to withstand a minimum of 100 mechanical operations with electrical load, where an electrical current is being passed through the connectors in accordance with IEC 60512 9 3 during the separation (unmating) step. This second edition cancels and replaces the first edition published in 2019. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: Test group UEL has been revised with respect to the order of the test phases, the test severities and the requirements.
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IEC 61076-8-112:2025 describes 2-pole snap locking rectangular power connectors with IP65/IP67 plastic housing, for rated current of 50 A. It includes overall dimensions, interface dimensions, technical characteristics, performance requirements, test methods.
The products covered by this detail specification are connectors with breaking capacity (CBC) according to IEC 61984 which are mainly used in DC power conduction, in the field of electrical and electronic equipment.
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IEC 61076-8-111:2025 describes 3-pole snap locking rectangular power connectors with IP65/IP67 plastic housing, for rated current of 20 A. It includes overall dimensions, interface dimensions, technical characteristics, performance requirements, and test methods.
The products covered by this detail specification are connectors with breaking capacity (CBC) according to IEC 61984 which are mainly used in AC power conduction, in the field of electrical and electronic equipment.
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IEC 61076-2-101:2024 describes M12 screw-locking circular connectors with 2-way up to 17‑way, for data transmission with frequencies up to 100 MHz and signal and power transmission at up to 250 V rated voltage and up to 4 A rated current per contact.
These connectors consist of fixed and free connectors, either rewirable or non-rewirable.
Male connectors have round contacts, Ø 0,6 mm, Ø 0,76 mm, Ø 0,8 mm or Ø 1,0 mm according to number of ways and coding, all contacts with the same size.
The different codings prevent the mating of differently coded male and female connectors.
This fourth edition cancels and replaces the third edition published in 2012. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Technical specifications regarding dimensional information (Clause 5) and characteristics (Clause 6) have been updated, and new subclauses have been added.
b) New style NF (free connectors) has been added.
c) Fixed connectors with glass to metal seals (former styles WM, XM, YM, ZM and WF, XF, TF and ZF) are no longer covered by this document: relevant definitions and requirements have been removed.
d) The P-coding has been eliminated.
e) Annex B (informative) Steel conduit thread, sizes has been deleted and a new Annex B (informative) Orientation of cable outlet in relation to coding has been added.
f) The dimension specification of former styles AM and BM have been moved into a new Annex C (normative).
- Standard77 pagesEnglish languagee-Library read for1 day
IEC 61076-2-101:2024 describes M12 screw-locking circular connectors with 2-way up to 17‑way, for data transmission with frequencies up to 100 MHz and signal and power transmission at up to 250 V rated voltage and up to 4 A rated current per contact. These connectors consist of fixed and free connectors, either rewirable or non-rewirable. Male connectors have round contacts, Ø 0,6 mm, Ø 0,76 mm, Ø 0,8 mm or Ø 1,0 mm according to number of ways and coding, all contacts with the same size. The different codings prevent the mating of differently coded male and female connectors. This fourth edition cancels and replaces the third edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Technical specifications regarding dimensional information (Clause 5) and characteristics (Clause 6) have been updated, and new subclauses have been added. b) New style NF (free connectors) has been added. c) Fixed connectors with glass to metal seals (former styles WM, XM, YM, ZM and WF, XF, TF and ZF) are no longer covered by this document: relevant definitions and requirements have been removed. d) The P-coding has been eliminated. e) Annex B (informative) Steel conduit thread, sizes has been deleted and a new Annex B (informative) Orientation of cable outlet in relation to coding has been added. f) The dimension specification of former styles AM and BM have been moved into a new Annex C (normative).
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IEC 60352-2:2024 is applicable to solderless crimped connections made with:
- appropriately designed uninsulated or pre-insulated crimp barrels as parts of crimp contacts, terminal ends or splices, and
- stranded wires of 0,05 mm2 to 10 mm2 cross-section or
- solid wires of 0,25 mm to 3,6 mm diameter;
for use in electrical and electronic equipment.
Information on the materials and data from industrial experience is included in addition to the test procedures to provide electrically stable connections under prescribed environmental conditions.
This part of IEC 60352 is not applicable to crimping of coaxial cables.
This part of IEC 60352 determines the suitability of solderless crimped connections as described above, under specified mechanical, electrical and atmospheric conditions and provides a means of comparing test results when the tools used to make the connections are of different designs or manufacture.
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This document specifies cable clamps for 2 and 4 module connectors, series 2 and series 3 used in the family of rectangular electrical connectors, operating temperature 175 °C continuous.
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This document specifies accessories of single modules connectors according to EN 4165 024 and EN 4165 025 used in the family of rectangular electrical connectors, operating temperature 175 °C continuous.
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This document specifies the oval chimneys for accessories for accessories used in the family of rectangular electrical connectors, operating temperature 175 °C continuous.
The connector accessory body corresponding to those oval chimneys is specified in EN 4165-014.
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This document specifies the blank chimneys (1 per module cavity) for accessories used in the family of rectangular electrical connectors, operating temperature 175 °C continuous.
The connector accessory body corresponding to those blank chimneys is specified in EN 4165-014.
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This document specifies the flange mounting receptacles 2 and 4 modules, series 2 used in the family of rectangular electrical connectors, operating temperature 175 °C continuous.
The plugs, flight caps and accessories corresponding to those receptacles are specified in EN 4165-002.
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- Corrigendum3 pagesEnglish languagee-Library read for1 day
IEC 60352-2:2024 is applicable to solderless crimped connections made with: - appropriately designed uninsulated or pre-insulated crimp barrels as parts of crimp contacts, terminal ends or splices, and - stranded wires of 0,05 mm2 to 10 mm2 cross-section or - solid wires of 0,25 mm to 3,6 mm diameter; for use in electrical and electronic equipment. Information on the materials and data from industrial experience is included in addition to the test procedures to provide electrically stable connections under prescribed environmental conditions. This part of IEC 60352 is not applicable to crimping of coaxial cables. This part of IEC 60352 determines the suitability of solderless crimped connections as described above, under specified mechanical, electrical and atmospheric conditions and provides a means of comparing test results when the tools used to make the connections are of different designs or manufacture.
- Standard134 pagesEnglish languagee-Library read for1 day
- Corrigendum3 pagesEnglish languagee-Library read for1 day
IEC 61076-2-101:2024 describes M12 screw-locking circular connectors with 2-way up to 17‑way, for data transmission with frequencies up to 100 MHz and signal and power transmission at up to 250 V rated voltage and up to 4 A rated current per contact.
These connectors consist of fixed and free connectors, either rewirable or non-rewirable.
Male connectors have round contacts, Ø 0,6 mm, Ø 0,76 mm, Ø 0,8 mm or Ø 1,0 mm according to number of ways and coding, all contacts with the same size.
The different codings prevent the mating of differently coded male and female connectors.
This fourth edition cancels and replaces the third edition published in 2012. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Technical specifications regarding dimensional information (Clause 5) and characteristics (Clause 6) have been updated, and new subclauses have been added.
b) New style NF (free connectors) has been added.
c) Fixed connectors with glass to metal seals (former styles WM, XM, YM, ZM and WF, XF, TF and ZF) are no longer covered by this document: relevant definitions and requirements have been removed.
d) The P-coding has been eliminated.
e) Annex B (informative) Steel conduit thread, sizes has been deleted and a new Annex B (informative) Orientation of cable outlet in relation to coding has been added.
f) The dimension specification of former styles AM and BM have been moved into a new Annex C (normative).
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This document specifies the rack and panel plug for 2 and 4 modules, series 2 used in the family of rectangular electrical connectors, operating temperature 175 °C continuous. The receptacles and accessories corresponding to those plugs are specified in EN 4165-002.
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This document specifies the plugs series 2, for 2 and 4 modules used in the family of rectangular electrical connectors, operating temperature 175 °C continuous. The receptacles and accessories corresponding to those plugs are specified in EN 4165 002.
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This document specifies the plug series 3, for 2 and 4 modules used in the family of rectangular electrical connectors, operating temperature 175 °C continuous. The receptacles and accessories corresponding to those plugs are specified in EN 4165 002.
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This document specifies the rack and panel rear mounted plug 2 and 4 modules, series 2 used in the family of rectangular electrical connectors, operating temperature 175 °C continuous. The receptacles and accessories corresponding to those plugs are specified in EN 4165-002.
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This document specifies the stackable mounting receptacles series 3, for 2 or 4 modules used in the family of rectangular electrical modular connectors, operating temperature 175 °C continuous. The plugs, flight caps and accessories corresponding to those receptacles are specified in EN 4165 002.
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IEC 60512-28-100:2024 specifies the test methods for signal integrity and transmission performance for connectors specified in respective parts of IEC 60603-7, IEC61076-1, IEC 61076-2, IEC 61076-3 and IEC 63171 series of standards for connecting hardware applications from 0,1 MHz up to 2 000 MHz, with reference to this document.
Note: This document is also suitable for testing signal integrity and transmission performance of connectors up to a lower value of maximum frequency; however, the test methodology specified in the detail specification for any given connector remains the reference conformance test for that connector.
The list of connector series of standards does not preclude referencing this document in other connector manufacturer’s specifications or published standards.
Test procedures provided herein are:
- insertion loss, test 28a;
- return loss, test 28b;
- near-end crosstalk (NEXT) test 28c;
- far-end crosstalk (FEXT), test 28d;
- transverse conversion loss (TCL), test 28f;
- transverse conversion transfer loss (TCTL), test 28g.
Other test procedures referenced herein are:
- shield transfer impedance (ZT), see IEC 60512‑26‑100, test 26e.
- coupling attenuation (aC), see IEC 62153-4-7 and IEC 62153‑4‑12.
- low frequency coupling attenuation (aCLF) see IEC 62153-4-7 and IEC 62153-4-15
This edition includes the following significant technical changes with respect to the previous edition:
-The frequency range has been modified to start at 0,1 MHz instead of 1 MHz, to include single-pair connectors.
-All tables and requirements have been revised down to 0,1 MHz, and partially improved to reduce the impact of the test fixture.
-Formulae to calculate the S-parameters from single-ended parameters have been added.
-A note was added for those parameters which are not applicable to single-pair connectors.
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IEC 60512-28-100:2024 specifies the test methods for signal integrity and transmission performance for connectors specified in respective parts of IEC 60603-7, IEC61076-1, IEC 61076-2, IEC 61076-3 and IEC 63171 series of standards for connecting hardware applications from 0,1 MHz up to 2 000 MHz, with reference to this document. Note: This document is also suitable for testing signal integrity and transmission performance of connectors up to a lower value of maximum frequency; however, the test methodology specified in the detail specification for any given connector remains the reference conformance test for that connector. The list of connector series of standards does not preclude referencing this document in other connector manufacturer’s specifications or published standards. Test procedures provided herein are: - insertion loss, test 28a; - return loss, test 28b; - near-end crosstalk (NEXT) test 28c; - far-end crosstalk (FEXT), test 28d; - transverse conversion loss (TCL), test 28f; - transverse conversion transfer loss (TCTL), test 28g. Other test procedures referenced herein are: - shield transfer impedance (ZT), see IEC 60512‑26‑100, test 26e. - coupling attenuation (aC), see IEC 62153-4-7 and IEC 62153‑4‑12. - low frequency coupling attenuation (aCLF) see IEC 62153-4-7 and IEC 62153-4-15 This edition includes the following significant technical changes with respect to the previous edition: -The frequency range has been modified to start at 0,1 MHz instead of 1 MHz, to include single-pair connectors. -All tables and requirements have been revised down to 0,1 MHz, and partially improved to reduce the impact of the test fixture. -Formulae to calculate the S-parameters from single-ended parameters have been added. -A note was added for those parameters which are not applicable to single-pair connectors.
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This document specifies the single module plug used in the family of rectangular electrical connectors, operating temperature 175 °C continuous. The receptacles and accessories corresponding to this plug are specified in EN 4165-002. The cavity of this connector is uncoded, so it can accept polarized modules N, A, B, C and D as specified in EN 4165-002.
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This document specifies the characteristics of jam-nuts for jam-nut receptacles in the family of circular electrical connectors coupled by threaded ring.
It is applicable to classes specified in Table 3.
For receptacles using these jam-nuts, see EN 2997-004, and EN 2997-006 for class SE only.
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IEC 60512-28-100:2024 specifies the test methods for signal integrity and transmission performance for connectors specified in respective parts of IEC 60603-7, IEC61076-1, IEC 61076-2, IEC 61076-3 and IEC 63171 series of standards for connecting hardware applications from 0,1 MHz up to 2 000 MHz, with reference to this document.
Note: This document is also suitable for testing signal integrity and transmission performance of connectors up to a lower value of maximum frequency; however, the test methodology specified in the detail specification for any given connector remains the reference conformance test for that connector.
The list of connector series of standards does not preclude referencing this document in other connector manufacturer’s specifications or published standards.
Test procedures provided herein are:
- insertion loss, test 28a;
- return loss, test 28b;
- near-end crosstalk (NEXT) test 28c;
- far-end crosstalk (FEXT), test 28d;
- transverse conversion loss (TCL), test 28f;
- transverse conversion transfer loss (TCTL), test 28g.
Other test procedures referenced herein are:
- shield transfer impedance (ZT), see IEC 60512‑26‑100, test 26e.
- coupling attenuation (aC), see IEC 62153-4-7 and IEC 62153‑4‑12.
- low frequency coupling attenuation (aCLF) see IEC 62153-4-7 and IEC 62153-4-15
This edition includes the following significant technical changes with respect to the previous edition:
-The frequency range has been modified to start at 0,1 MHz instead of 1 MHz, to include single-pair connectors.
-All tables and requirements have been revised down to 0,1 MHz, and partially improved to reduce the impact of the test fixture.
-Formulae to calculate the S-parameters from single-ended parameters have been added.
-A note was added for those parameters which are not applicable to single-pair connectors.
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IEC 60317-35:2013 specifies the requirements of solderable enamelled round copper winding wire of class 155 with a dual coating. The underlying coating is based on poly-urethane resin, which may be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements. The superimposed coating is a bonding layer based on a thermoplastic resin. NOTE - A modified resin is a resin that has undergone a chemical change, or contains one or more additives to enhance certain performance or application characteristics. The range of nominal conductor diameters covered by this standard is:
- Grade 1B: 0,020 mm up to and including 0,800 mm;
- Grade 2B: 0,020 mm up to and including 0,800 mm. The nominal conductor diameters are specified in Clause 4 of IEC 60317-0-1:2013. This second edition cancels and replaces the first edition published in 1992, Amendment 1:1997 and Amendment 2:1999. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- new 3.2.2 containing general notes on winding wire, formerly a part of the scope;
- revision to references to IEC 60317-0-1:2013 to clarify that their application is normative;
- modification to Clause 15 to remove specific wire specimen sizes;
- consolidation of 17.1 and 17.2 of the solderability requirements;
- new Clause 23, Pin hole test. Key words: requirements of solderable enamelled round copper winding wire, class 155, dual coating
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