EN IEC 61076-2-118:2026
(Main)Connectors for electrical and electronic equipment - Product requirements - Part 2-118: Circular connectors - Detail specification for shielded and unshielded, free and fixed connectors with bayonet-locking size B12, B17, B23 and B40, for power, signal and data transmission
- Abstract
This part of IEC 61076 specifies circular connectors with bayonet locking size B12, B17, B23 and B40, typically used for power, signal and data transmissions in industrial applications.
These connectors consist of fixed and free connectors either rewirable or non-rewirable.
NOTE B indicates that the connector is equipped with bayonet locking, while 12, 17, 23, 40 are the approximate dimensions in millimetres of the contact carrier diameter of these circular connectors.
Power contacts of male connectors are round contacts with Ø 1 mm, Ø 1,5 mm, Ø 1,8 mm, Ø 2,25 mm and Ø 4 mm, with current ratings up to 64 A per pole and rated voltage of 50 V, 300 V or 600 V AC/DC. Power contact groups are classified by type and identified throughout this document as “P” followed by two digits “01” through “09” (see 4.3, Table 1).
Signal contacts of male connectors are round contacts with Ø 1 mm and Ø 1,8 mm, with current ratings up to 20 A per pole and rated voltage of 50 V AC/DC. Signal contact groups are classified by type and identified throughout this document as “S” followed by “0”, “1”, or “2” (see 4.3, Table 2).
Male data contacts are round with Ø 0,8 mm and Ø 1 mm, with current ratings up to 4 A and rated voltage of 50 V AC/DC, Data modules are classified by type and identified throughout this document as “D” followed by “1”, or “2” (see 4.3, Table 3). D1 modules provide data transmission with frequencies from 1 MHz to 100 MHz; D2 modules provide data transmission with frequencies from 0,1 MHz to 600 MHz.
Besides the size of their bayonet locking (B12, B17, B23 or B40), connectors according to this document can be identified by data module (D) and complementing power (P) and signal (S) contact groups and optionally by number of poles, and finally by their application.
These connectors are designated for two main target applications, which differ as follows:
– Application A is for data transmission with power over data.
– Application B is for data transmission without power over data.
Connectors with power, signal and data contacts of the same gender are intended to also transmit power over the data contacts (application A), while connectors with data contacts not of the same gender of power and signal contacts are not intended to transmit power over the data contacts (application B).
The codings provided by this document prevent the mating to any other connector with similarly sized interfaces covered by this document.
- Status
- Published
- Publication Date
- 22-Oct-2026
- Technical Committee
- CLC/SR 48B - Connectors
- Drafting Committee
- IEC/SC 48B - IEC_SC_48B
- Current Stage
- 6060 - Document made available - Publishing
- Start Date
- 23-Oct-2026
- Due Date
- 24-Jan-2025
- Completion Date
- 23-Oct-2026
EN IEC 61076-2-118:2026 is a CLC standard for circular connectors with bayonet-locking sizes B12, B17, B23 and B40. It specifies product requirements for shielded and unshielded, free and fixed connectors used for power, signal and data transmission in industrial applications. The document gives the dimensions, ratings, characteristics and test schedule that manufacturers, designers, quality teams and buyers use to select and verify compatible connectors.
What does EN IEC 61076-2-118:2026 specify?
EN IEC 61076-2-118:2026 specifies circular connectors of sizes B12, B17, B23 and B40 with bayonet locking, including fixed and free connectors, rewirable and non-rewirable versions, and power, signal and data contact arrangements. Clause 1 states that the connectors are typically used in industrial applications.
The document organizes its technical content into clear blocks:
- Clause 2 lists the normative references used throughout the standard.
- Clause 3 gives the defined terms used by the document.
- Clause 4 covers technical information such as level systems, climatic classification, current-carrying capacity, type designation, marking and safety.
- Clause 5 gives dimensional information for the connector styles, interface dimensions, mating direction and gauges.
- Clause 6 states the electrical, transmission, mechanical and environmental characteristics.
- Clause 7 sets out the test schedule and the order of testing.
Clause 1 also describes the contact families and the way the connector is identified. Power contacts are grouped as P01 to P09, signal contacts as S0 to S2, and data modules as D1 or D2. That matters in practice because the type code tells you exactly which contact mix, size and application you are specifying.
What are the key requirements of EN IEC 61076-2-118:2026?
EN IEC 61076-2-118:2026 combines interface control, electrical ratings, transmission performance and verification testing. The most important point is that a connector is only acceptable when its size, coding, contact group, mounting style and test results all match the chosen type designation.
Connector identification and mating
Clause 4.4 defines an 8-digit type designation built from connector size, power contact group, signal contact group, data module type and application A or B. Clause 4.3 and Table 5 link that code to the permitted contact combinations. In practice, this is the ordering language for procurement and tooling.
The standard distinguishes application A and application B by the gender of the data contacts. Application A uses the same gender relationship for power/signal and data contacts so that power can also be transmitted over the data contacts. Application B uses opposite gender for the data contacts and is not intended to transmit power over the data contacts. That distinction matters because connectors of the same type but different application are not intermateable.
Clause 4.2 says the connectors are intermateable according to IEC 61076-1, and the codings prevent mating to other similarly sized interfaces covered by the document. That helps avoid accidental misconnection on the machine or panel.
Electrical ratings and transmission performance
Clause 4.3 gives the rated current and voltage for the power, signal and data parts. The power part reaches up to 64 A per pole and uses 50 V, 300 V or 600 V AC/DC depending on type. The signal part reaches up to 20 A per pole at 50 V AC/DC, and the data part reaches up to 8 A at 50 V AC/DC with transmission performance up to 600 MHz. For a user, that means the exact contact group must be checked against the electrical load and the communication requirement.
Clause 6.4 sets the electrical tests:
- voltage proof for mated connectors,
- rated impulse withstand voltage and pollution degree,
- current-carrying capacity,
- contact and shield resistance,
- insulation resistance.
Clause 6.5 then sets the transmission requirements for the data modules. It covers insertion loss, return loss, NEXT, FEXT, TCL, TCTL, transfer impedance, coupling attenuation, PS NEXT, PS AFEXT and propagation delay. The results are assessed as the worst case over the tested samples, so the user gets a conservative acceptance result rather than a single best reading.
Mechanical, climatic and protection requirements
Clause 4.6 applies IEC 61984 for safety aspects, and it states that size B12 connectors are only for ELV applications without PE contact. For panel design and system safety, that is a direct design constraint.
Clause 6.3 assigns the climatic category 30/085/21. Clause 6.7 sets vibration, shock and ingress protection requirements, including IP65 or IP65/IP67 in mated and locked condition, with IP68 and/or IP69 by agreement between manufacturer and user. Clause 6.7.4 also limits locking and unlocking torque by size. In practice, these clauses tell you whether the connector family is suitable for the environment and handling expected in service.
Clause 6.6 sets mechanical performance requirements such as:
- number of mechanical operations by performance level,
- connector coupling device force,
- insertion and withdrawal forces,
- polarization and coding checks.
That is the part to look at when you need repeated mating, resistance to vibration, or guaranteed correct orientation during assembly.
Test schedule, gauges and evidence
Clause 7 organizes qualification into test groups P, AP, BP, CP, DP, EP and FP. The standard uses mated and locked specimens for most tests, keeps the same connector combination through the sequence, and specifies specimen counts for the different groups. It also includes contact resistance arrangements, vibration fixtures and specimen wiring rules, so test houses know how to prepare samples.
Clause 5.4 defines gauges for sizing and retention-force checks. The gauges are hardened tool steel with controlled surface roughness and a clean, grease-free surface. In practice, those gauges are used to confirm retention and fit, not just visual appearance.
What terms does EN IEC 61076-2-118:2026 define?
- Protective conductor (PE) - A conductor provided for safety, for example protection against electric shock.
- Mounting orientation - The circular mounting position of the connector relative to the polarization of the mating interface.
- Application A - The connector arrangement in which power/signal and data contacts have the same gender and power may also be transmitted over the data contacts.
- Application B - The connector arrangement in which the data contacts have the opposite gender and power is not intended to be transmitted over the data contacts.
- Near-end cross talk (NEXT) - A signal integrity parameter that describes unwanted coupling measured near the transmitting end.
- Far-end cross talk (FEXT) - A signal integrity parameter that describes unwanted coupling measured at the far end.
- Transverse conversion loss (TCL) - A measure of conversion between differential and common-mode signals.
- Transverse conversion transfer loss (TCTL) - A related conversion loss parameter used in the transmission tests.
Who uses EN IEC 61076-2-118:2026?
EN IEC 61076-2-118:2026 is used by connector manufacturers, cable assembly makers, equipment designers, test laboratories, quality managers and buyers working with industrial electrical and electronic equipment. They use it to choose the right size and contact combination, define panel and cable interfaces, check mating compatibility, and verify electrical, mechanical and environmental performance. It is also relevant when a project needs documented qualification of power, signal and data connectors before release.
Which standards are used with EN IEC 61076-2-118:2026?
| Standard | What it contributes |
|---|---|
| IEC 61076-1:2006 | Generic connector specification, intermateability basis and marking requirements. |
| IEC 61984 | Safety requirements and tests for connectors. |
| IEC 60512 series | Test methods for visual examination, dimensions, contact resistance, insulation, voltage stress, current capacity, vibration, shock and endurance. |
| IEC 60068-1 | General environmental test conditions and standard atmospheric conditions. |
| IEC 60050-581:2008 | Vocabulary source for protective conductor and related electrotechnical terms. |
| IEC 60352 series | Methods and guidance for solderless connections such as crimp, insulation displacement, press-in and spring clamp terminations. |
| IEC 60999-1 | Requirements for screw-type and screwless-type clamping units. |
| IEC 60664-1 | Insulation coordination, including impulse withstand and pollution degree context. |
| IEC 60529 | Degree of protection provided by enclosures, used for IP ratings. |
| IEC 62197-1 | Quality assessment requirements for connectors. |
| IEC 60512-28-100 | Signal integrity test methods and reference planes up to 2 000 MHz. |
| ISO 11469 | Generic identification and marking of plastics products. |
| ISO 21920-1:2021 | Surface texture indication for the gauge and related surface requirements. |
What does the EN IEC 61076-2-118:2026 document contain?
EN IEC 61076-2-118:2026 contains a detailed product specification rather than a short catalogue of sizes. Clause 5 gives drawings and dimensions for fixed and free connector styles, including straight and angled versions, front and rear mounting styles, bayonet entries and mechanical codings. It also gives the interface dimensions for B12, B17, B23 and B40 and for the trapezoidal data modules D1 and D2.
The document also includes tables for contact positioning, mating direction and mated dimensions, which are the practical basis for connector design and panel integration. Clause 6 gives the electrical, transmission, mechanical and environmental acceptance criteria, and Clause 7 turns those criteria into a structured qualification sequence with fixture and specimen guidance.
Relations
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
- Effective Date
- 29-Sep-2026
Frequently Asked Questions
EN IEC 61076-2-118:2026 is a standard published by CLC. Its full title is "Connectors for electrical and electronic equipment - Product requirements - Part 2-118: Circular connectors - Detail specification for shielded and unshielded, free and fixed connectors with bayonet-locking size B12, B17, B23 and B40, for power, signal and data transmission". This standard covers: This part of IEC 61076 specifies circular connectors with bayonet locking size B12, B17, B23 and B40, typically used for power, signal and data transmissions in industrial applications. These connectors consist of fixed and free connectors either rewirable or non-rewirable. NOTE B indicates that the connector is equipped with bayonet locking, while 12, 17, 23, 40 are the approximate dimensions in millimetres of the contact carrier diameter of these circular connectors. Power contacts of male connectors are round contacts with Ø 1 mm, Ø 1,5 mm, Ø 1,8 mm, Ø 2,25 mm and Ø 4 mm, with current ratings up to 64 A per pole and rated voltage of 50 V, 300 V or 600 V AC/DC. Power contact groups are classified by type and identified throughout this document as “P” followed by two digits “01” through “09” (see 4.3, Table 1). Signal contacts of male connectors are round contacts with Ø 1 mm and Ø 1,8 mm, with current ratings up to 20 A per pole and rated voltage of 50 V AC/DC. Signal contact groups are classified by type and identified throughout this document as “S” followed by “0”, “1”, or “2” (see 4.3, Table 2). Male data contacts are round with Ø 0,8 mm and Ø 1 mm, with current ratings up to 4 A and rated voltage of 50 V AC/DC, Data modules are classified by type and identified throughout this document as “D” followed by “1”, or “2” (see 4.3, Table 3). D1 modules provide data transmission with frequencies from 1 MHz to 100 MHz; D2 modules provide data transmission with frequencies from 0,1 MHz to 600 MHz. Besides the size of their bayonet locking (B12, B17, B23 or B40), connectors according to this document can be identified by data module (D) and complementing power (P) and signal (S) contact groups and optionally by number of poles, and finally by their application. These connectors are designated for two main target applications, which differ as follows: – Application A is for data transmission with power over data. – Application B is for data transmission without power over data. Connectors with power, signal and data contacts of the same gender are intended to also transmit power over the data contacts (application A), while connectors with data contacts not of the same gender of power and signal contacts are not intended to transmit power over the data contacts (application B). The codings provided by this document prevent the mating to any other connector with similarly sized interfaces covered by this document.
This part of IEC 61076 specifies circular connectors with bayonet locking size B12, B17, B23 and B40, typically used for power, signal and data transmissions in industrial applications. These connectors consist of fixed and free connectors either rewirable or non-rewirable. NOTE B indicates that the connector is equipped with bayonet locking, while 12, 17, 23, 40 are the approximate dimensions in millimetres of the contact carrier diameter of these circular connectors. Power contacts of male connectors are round contacts with Ø 1 mm, Ø 1,5 mm, Ø 1,8 mm, Ø 2,25 mm and Ø 4 mm, with current ratings up to 64 A per pole and rated voltage of 50 V, 300 V or 600 V AC/DC. Power contact groups are classified by type and identified throughout this document as “P” followed by two digits “01” through “09” (see 4.3, Table 1). Signal contacts of male connectors are round contacts with Ø 1 mm and Ø 1,8 mm, with current ratings up to 20 A per pole and rated voltage of 50 V AC/DC. Signal contact groups are classified by type and identified throughout this document as “S” followed by “0”, “1”, or “2” (see 4.3, Table 2). Male data contacts are round with Ø 0,8 mm and Ø 1 mm, with current ratings up to 4 A and rated voltage of 50 V AC/DC, Data modules are classified by type and identified throughout this document as “D” followed by “1”, or “2” (see 4.3, Table 3). D1 modules provide data transmission with frequencies from 1 MHz to 100 MHz; D2 modules provide data transmission with frequencies from 0,1 MHz to 600 MHz. Besides the size of their bayonet locking (B12, B17, B23 or B40), connectors according to this document can be identified by data module (D) and complementing power (P) and signal (S) contact groups and optionally by number of poles, and finally by their application. These connectors are designated for two main target applications, which differ as follows: – Application A is for data transmission with power over data. – Application B is for data transmission without power over data. Connectors with power, signal and data contacts of the same gender are intended to also transmit power over the data contacts (application A), while connectors with data contacts not of the same gender of power and signal contacts are not intended to transmit power over the data contacts (application B). The codings provided by this document prevent the mating to any other connector with similarly sized interfaces covered by this document.
EN IEC 61076-2-118:2026 is classified under the following ICS (International Classification for Standards) categories: 31.220.10 - Plug-and-socket devices. Connectors. The ICS classification helps identify the subject area and facilitates finding related standards.
EN IEC 61076-2-118:2026 has the following relationships with other standards: It is inter standard links to EN 60352-5:2008, EN 60512-16-5:2008, EN 60512-9-2:2012, EN 60352-2:1994/A2:2002, EN 60352-5:2001/A1:2003, EN IEC 60664-1:2020, EN 60352-1:1997, EN IEC 60512-1:2018, EN ISO 21920-1:2022, EN 60512-6-3:2002, EN 60512-13-2:2006, EN IEC 60512-11-1:2019, EN 60529:1991/A2:2013, EN 60352-8:2011, EN 60512-5-1:2002. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN IEC 61076-2-118:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2026
Konektorji za električno in elektronsko opremo - Zahteve za izdelek - 2-118. del:
Okrogli konektorji - Podrobna specifikacija za oklepljene in neoklepljene, proste in
pritrjene konektorje z bajonetnim zaklepom velikosti B12, B17, B23 in B40, za
prenos električnega napajanja, signalov in podatkov (IEC 61076-2-118:2026)
Connectors for electrical and electronic equipment - Product requirements - Part 2-118:
Circular connectors - Detail specification for shielded and unshielded, free and fixed
connectors with bayonet-locking size B12, B17, B23 and B40, for power, signal and data
transmission (IEC 61076-2-118:2026)
Steckverbinder für elektrische und elektronische Geräte - Produktanforderungen -
Rundsteckverbinder - Einzelspezifikation für geschirmte und ungeschirmte, freie und
feste Steckverbinder mit Bajonettverriegelung der Größen B12, B17, B23 und B40, für
die Energie-, Signal- und Datenübertragung (IEC 61076-2-118:2026
Connecteurs pour équipements électriques et électroniques - Exigences de produit -
Partie 2-118: Connecteurs circulaires - Spécification particulière relative aux fiches et
embases écrantées ou non écrantées avec verrouillage à baïonnette, des tailles B12,
B17, B23 et B40, pour la transmission de signaux, de puissance et de données (IEC
61076-2-118:2026
Ta slovenski standard je istoveten z: EN IEC 61076-2-118:2026
ICS:
31.220.10 Vtiči in vtičnice, konektorji Plug-and-socket devices.
Connectors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 61076-2-118
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2026
ICS 31.220.10
English Version
Connectors for electrical and electronic equipment - Product
requirements - Part 2-118: Circular connectors - Detail
specification for shielded and unshielded, free and fixed
connectors with bayonet-locking size B12, B17, B23 and B40, for
power, signal and data transmission
(IEC 61076-2-118:2026)
Connecteurs pour équipements électriques et électroniques Steckverbinder für elektrische und elektronische Geräte -
- Exigences de produit - Partie 2-118: Connecteurs Produktanforderungen - Rundsteckverbinder -
circulaires - Spécification particulière relative aux fiches et Einzelspezifikation für geschirmte und ungeschirmte, freie
embases écrantées ou non écrantées avec verrouillage à und feste Steckverbinder mit Bajonettverriegelung der
baïonnette, des tailles B12, B17, B23 et B40, pour la Größen B12, B17, B23 und B40, für die Energie-, Signal-
transmission de signaux, de puissance et de données und Datenübertragung
(IEC 61076-2-118:2026) (IEC 61076-2-118:2026)
This European Standard was approved by CENELEC on 2026-10-05. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61076-2-118:2026 E
European foreword
The text of document 48B/3196/FDIS, future edition 1 of IEC 61076-2-118, prepared by SC 48B
"Electrical connectors" of IEC/TC 48 "Electrical connectors and mechanical structures for electrical
and electronic equipment" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 61076-2-118:2026.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2027-10-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-10-31
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61076-2-118:2026 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 62197-1 NOTE Approved as EN 62197-1
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60068-1 - Environmental testing - Part 1: General EN 60068-1 -
and guidance
IEC 60352 series Solderless connections EN 60352 series
IEC 60512-1 - Connectors for electrical and electronic EN IEC 60512-1 -
equipment - Tests and measurements -
Part 1: Generic specification
IEC 60512-1-1 - Connectors for electronic equipment - EN 60512-1-1 -
Tests and measurements - Part 1-1:
General examination - Test 1a: Visual
examination
IEC 60512-1-2 - Connectors for electronic equipment - EN 60512-1-2 -
Tests and measurements - Part 1-2:
General examination - Test 1b:
Examination of dimension and mass
IEC 60512-2-1 - Connectors for electronic equipment - EN 60512-2-1 -
Tests and measurements - Part 2-1:
Electrical continuity and contact resistance
tests - Test 2a: Contact resistance -
Millivolt level method
IEC 60512-2-5 - Connectors for electronic equipment - EN 60512-2-5 -
Tests and measurements - Part 2-5:
Electrical continuity and contact resistance
tests - Test 2e: Contact disturbance
IEC 60512-3-1 - Connectors for electronic equipment - EN 60512-3-1 -
Tests and measurements - Part 3-1:
Insulation tests - Test 3a: Insulation
resistance
IEC 60512-4-1 - Connectors for electronic equipment - EN 60512-4-1 -
Tests and measurements - Part 4-1:
Voltage stress tests - Test 4a: Voltage
proof
IEC 60512-5-1 - Connectors for electronic equipment - EN 60512-5-1 -
Tests and measurements - Part 5-1:
Current-carrying capacity tests - Test 5a:
Temperature rise
IEC 60512-6-3 - Connectors for electronic equipment - EN 60512-6-3 -
Tests and measurements - Part 6-3:
Dynamic stress tests - Test 6c: Shock
IEC 60512-6-4 - Connectors for electronic equipment - EN 60512-6-4 -
Tests and measurements - Part 6-4:
Dynamic stress tests - Test 6d: Vibration
(sinusoidal)
IEC 60512-9-1 - Connectors for electronic equipment - EN 60512-9-1 -
Tests and measurements - Part 9-1:
Endurance tests - Test 9a: Mechanical
operation
IEC 60512-9-2 - Connectors for electronic equipment - EN 60512-9-2 -
Tests and measurements - Part 9-2:
Endurance tests - Test 9b: Electrical load
and temperature
IEC 60512-11-1 - Connectors for electrical and electronic EN IEC 60512-11-1 -
equipment - Tests and measurements -
Part 11-1: Climatic tests - Test 11a -
Climatic sequence
IEC 60512-11-4 - Connectors for electronic equipment - EN 60512-11-4 -
Tests and measurements - Part 11-4:
Climatic tests - Test 11d: Rapid change of
temperature
IEC 60512-11-9 - Connectors for electronic equipment - EN 60512-11-9 -
Tests and measurements - Part 11-9:
Climatic tests - Test 11i: Dry heat
IEC 60512-11-10 - Connectors for electronic equipment - EN 60512-11-10 -
Tests and measurements - Part 11-10:
Climatic tests - Test 11j: Cold
IEC 60512-11-12 - Connectors for electronic equipment - EN 60512-11-12 -
Tests and measurements - Part 11-12:
Climatic tests - Test 11m: Damp heat,
cyclic
IEC 60512-13-2 - Connectors for electronic equipment - EN 60512-13-2 -
Tests and measurements - Part 13-2:
Mechanical operation tests - Test 13b:
Insertion and withdrawal forces
IEC 60512-13-5 - Connectors for electronic equipment - EN 60512-13-5 -
Tests and measurements - Part 13-5:
Mechanical operation tests - Test 13e:
Polarizing and keying method
IEC 60512-16-5 - Connectors for electronic equipment - EN 60512-16-5 -
Tests and measurements - Part 16-5:
Mechanical tests on contacts and
terminations - Test 16e: Gauge retention
force (resilient contacts)
IEC 60512-28-100 - Connectors for electrical and electronic EN IEC 60512-28- -
equipment - Tests and measurements - 100
Part 28-100: Signal integrity tests up to 2
000 MHz - Tests 28a to 28g
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code)
- - + corrigendum May 1993
+ A1 1999 + A1 2000
+ A2 2013 + A2 2013
IEC 60664-1 2020 Insulation coordination for equipment EN IEC 60664-1 2020
within low-voltage supply systems - Part 1:
Principles, requirements and tests
IEC 60998-2-1 - Connecting devices for low-voltage circuits EN 60998-2-1 -
for household and similar purposes - Part
2-1: Particular requirements for connecting
devices as separate entities with screw-
type clamping units
IEC 60999-1 - Connecting devices - Electrical copper EN 60999-1 -
conductors - Safety requirements for
screw-type and screwless-type clamping
units - Part 1: General requirements and
particular requirements for clamping units
for conductors from 0,2 mm2 up to 35 mm2
(included)
IEC 61076-1 - Connectors for electronic equipment - EN 61076-1 -
Product requirements - Part 1: Generic
specification
IEC 61984 2008 Connectors - Safety requirements and EN 61984 2009
tests
ISO 21920-1 - Geometrical product specifications (GPS) - EN ISO 21920-1 -
Surface texture: Profile - Part 1: Indication
of surface texture
IEC 61076-2-118 ®
Edition 1.0 2026-08
INTERNATIONAL
STANDARD
Connectors for electrical and electronic equipment - Product requirements -
Part 2-118: Circular connectors - Detail specification for shielded and
unshielded, free and fixed connectors with bayonet-locking size B12, B17, B23
and B40, for power, signal and data transmission
ICS 31.220.10 ISBN 978-2-8327-1466-9
IEC 61076-2-118:2026-08(en)
IEC 61076-2-118:2026 © IEC 2026
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 11
4 Technical information . 12
4.1 Systems of levels . 12
4.1.1 Performance levels . 12
4.1.2 Compatibility levels . 12
4.2 Classification into climatic categories . 12
4.3 Current-carrying capacity . 12
4.4 Type designation . 13
4.5 Marking . 16
4.6 Safety aspects . 16
5 Dimensional information . 16
5.1 General . 16
5.2 Survey of styles and variants . 16
5.2.1 General . 16
5.2.2 Terminations. 16
5.2.3 Fixed connectors . 16
5.2.4 Free connectors. 21
5.3 Interface dimensions . 30
5.3.1 Interface dimensions – B12 . 30
5.3.2 Interface dimensions – B17 . 37
5.3.3 Interface dimensions – B23 . 55
5.3.4 Interface dimensions – B40 . 66
5.3.5 Interface dimensions – Trapezoidal data module . 75
5.3.6 Engagement (mating) direction . 78
5.4 Gauges . 82
6 Characteristics . 83
6.1 General . 83
6.2 Contact assignment and other definitions . 83
6.3 Classification into climatic categories . 83
6.4 Electrical characteristics . 84
6.4.1 General . 84
6.4.2 Voltage proof . 84
6.4.3 Rated impulse withstand voltage – pollution degree . 85
6.4.4 Current-carrying capacity – temperature rise . 85
6.4.5 Contact and shield resistance . 86
6.4.6 Insulation resistance . 86
6.5 Transmission performance . 86
6.5.1 General . 86
6.5.2 Insertion loss . 86
6.5.3 Return loss . 87
6.5.4 Near-end cross talk (NEXT) . 87
6.5.5 Far-end cross talk (FEXT). 87
IEC 61076-2-118:2026 © IEC 2026
6.5.6 Transverse conversion loss (TCL) . 88
6.5.7 Transverse conversion transfer loss (TCTL) . 88
6.5.8 Transfer impedance . 88
6.5.9 Coupling attenuation . 89
6.5.10 Power sum alien (exogenous) NEXT (PS NEXT) . 89
6.5.11 Power sum alien (exogenous) FEXT (PS AFEXT) . 89
6.5.12 Propagation delay . 90
6.6 Mechanical characteristics . 90
6.6.1 Mechanical operations . 90
6.6.2 Effectiveness of connector coupling device . 90
6.6.3 Insertion and withdrawal forces . 91
6.6.4 Polarization and coding . 91
6.7 Other characteristics . 92
6.7.1 Vibration (sinusoidal) . 92
6.7.2 Shock . 92
6.7.3 Degree of protection provided by enclosures (IP code) . 92
6.7.4 Locking and unlocking torque . 92
6.7.5 Environmental aspects – Marking of insulation material (plastics) . 92
7 Test schedule . 93
7.1 General . 93
7.1.1 Overview . 93
7.1.2 Climatic category . 93
7.1.3 Arrangement for contact resistance measurements . 93
7.1.4 Arrangement for dynamic stress tests (vibration) . 94
7.1.5 Wiring of specimens . 95
7.2 Test schedule . 96
7.2.1 Test group P – Preliminary . 96
7.2.2 Test group AP – Dynamic/climatic . 96
7.2.3 Test group BP – Mechanical endurance . 99
7.2.4 Test group CP – Electrical load . 100
7.2.5 Test group DP – Connection method tests . 101
7.2.6 Test group EP – Signal integrity requirements . 101
7.2.7 Test group FP – Current carrying capacity . 102
Bibliography . 103
Figure 1 – Fixed connector with wire ends, male power contacts, male data contacts,
bayonet locking notch, and square flange front mounting . 17
Figure 2 – Fixed connector with wire ends, male power contacts, male data contacts,
bayonet locking notch, single hole front mounting, and keyway orientation . 18
Figure 3 – Fixed connector with wire ends, male power contacts, male data contacts,
bayonet locking notch, single hole rear mounting, and keyway orientation . 19
Figure 4 – Fixed connector with wire ends, female power contacts, female data
contacts, bayonet locking notch, and square flange front mounting . 19
Figure 5 – Fixed connector with wire ends, female power contacts, female data
contacts, bayonet locking notch, single hole front mounting, and keyway orientation . 20
Figure 6 – Fixed connector with wire ends, female power contacts, female data
contacts, bayonet locking notch, single hole rear mounting, and keyway orientation . 21
IEC 61076-2-118:2026 © IEC 2026
Figure 7 – Rewirable connector, male, straight version, with bayonet locking nut . 22
Figure 8 – Rewirable connector, male, angled version, with bayonet locking nut . 23
Figure 9 – Non-rewirable connector, male, straight version, with bayonet locking nut . 24
Figure 10 – Non-rewirable connector, male, angled version, with bayonet locking nut . 24
Figure 11 – Rewirable connector, male, straight version, with bayonet locking notch . 25
Figure 12 – Non-rewirable connector, male, straight version, with bayonet locking notch . 26
Figure 13 – Rewirable connector, female, straight version, with bayonet locking nut . 26
Figure 14 – Rewirable connector, female, angled version, with bayonet locking nut . 27
Figure 15 – Non-rewirable connector, female, straight version, with bayonet locking nut . 27
Figure 16 – Non-rewirable connector, female, angled version, with bayonet locking nut . 28
Figure 17 – Rewirable connector, female, straight version, with bayonet locking notch . 29
Figure 18 – Non-rewirable connector, female, straight version, with bayonet locking notch . 29
Figure 19 – Dimensions of contact positioning of type B1201011 . 31
Figure 20 – Dimensions of contact positioning of type B1201012 . 32
Figure 21 – Dimension of B12 bayonet locking (2 bayonet grooves) . 35
Figure 22 – Dimensions of contact positioning of type B1702011 . 37
Figure 23 – Dimensions of contact positioning of type B1702012 . 38
Figure 24 – Dimensions of contact positioning of type B1703011 . 40
Figure 25 – Dimensions of contact positioning of type B1703012 . 41
Figure 26 – Dimensions of contact positioning of type B1704011 . 43
Figure 27 – Dimensions of contact positioning of type B1704012 . 44
Figure 28 – Dimensions of contact positioning of type B1705011 . 46
Figure 29 – Dimensions of contact positioning of type B1705012 . 47
Figure 30 – Dimension of contact positioning of type B1706211 . 49
Figure 31 – Dimensions of contact positioning of type B1706212 . 50
Figure 32 – Dimension of B17 bayonet locking (2 bayonet grooves) . 53
Figure 33 – Dimensions of contact positioning of type B2307011 . 56
Figure 34 – Dimensions of contact positioning of type B2307012 . 57
Figure 35 – Dimension of contact positioning of type B2308111 . 60
Figure 36 – Dimensions of contact positioning of type B2308112 . 61
Figure 37 – Dimension of B23 bayonet locking (2 bayonet grooves) . 64
Figure 38 – Dimensions of contact positioning of type B4009011 . 67
Figure 39 – Dimensions of contact positioning of type B4009012 . 68
Figure 40 – Dimension of B40 bayonet locking (3 bayonet grooves) . 71
Figure 41 – Dimensions of contact positioning and cross section of D1 data module . 75
Figure 42 – Area for electric contact of shielding of D1 shielded data module . 76
Figure 43 – Dimensions of contact positioning and cross section D2 data module . 77
Figure 44 – Area for electric contact of shielding of D2 shielded data module . 78
Figure 45 – Engagement (mating) information . 79
Figure 46 – Gauge dimension . 83
Figure 47 – Contact resistance arrangement . 94
Figure 48 – Dynamic stress test arrangement . 95
IEC 61076-2-118:2026 © IEC 2026
Table 1 – Ratings of connector power part . 12
Table 2 – Ratings of connector signal part . 13
Table 3 – Ratings of connector data part (data module) . 13
Table 4 – Type designation . 14
Table 5 – Combination possibilities of power, signal and data . 15
Table 6 – Styles of fixed connectors . 17
Table 7 – Dimensions of style DM . 17
Table 8 – Dimensions of style EM . 18
Table 9 – Dimensions of style FM . 19
Table 10 – Dimensions of style DF . 20
Table 11 – Dimensions of style EF . 20
Table 12 – Dimensions of style FF . 21
Table 13 – Styles of free connectors . 22
Table 14 – Dimensions of style GM . 23
Table 15 – Dimensions of style HM . 23
Table 16 – Dimensions of style IM . 24
Table 17 – Dimensions of style JM . 25
Table 18 – Dimensions of style KM . 25
Table 19 – Dimensions of style LM . 26
Table 20 – Dimensions of style GF . 26
Table 21 – Dimensions of style HF . 27
Table 22 – Dimensions of style IF . 28
Table 23 – Dimensions of style JF . 28
Table 24 – Dimensions of style KF . 29
Table 25 – Dimensions of style LF . 30
Table 26 – Dimensions of contact positioning of type B12010 . 33
Table 27 – Type of B12 combined with D1 and D2 as application A . 34
Table 28 – Type of B12 combined with D1 and D2 as application B . 34
Table 29 – Dimensions of B12 bayonet locking . 35
Table 30 – Mechanical codings B12 connectors . 36
Table 31 – Dimensions of B12 mechanical codings . 36
Table 32 – Dimensions of contact positioning of types B17020 . 39
Table 33 – Dimensions of contact positioning of types B17030 . 42
Table 34 – Dimensions of contact positioning of types B17040 . 45
Table 35 – Dimensions of contact positioning of types B17050 . 48
Table 36 – Dimensions of contact positioning of types B17062 . 51
Table 37 – Types of B17 combined with D1 and D2 as application A . 52
Table 38 – Types of B17 combined with D1 and D2 as application B . 52
Table 39 – Dimensions of B17 bayonet locking . 53
Table 40 – Mechanical codings B17 connectors . 54
Table 41 – Dimensions of B17 mechanical codings . 55
Table 42 – Dimensions of contact positioning of types B23070 . 58
Table 43 – Dimensions of contact positioning of types B23081 . 62
IEC 61076-2-118:2026 © IEC 2026
Table 44 – Types of B23 combined with D1 and D2 as application A . 63
Table 45 – Types of B23 combined with D1 as application B . 64
Table 46 – Dimensions of B23 bayonet locking . 65
Table 47 – Mechanical codings of B23 connectors . 65
Table 48 – Dimensions of B23 mechanical codings . 66
Table 49 – Dimensions of contact positioning of types B40090 . 69
Table 50 – Type of B40 combined with D1 and D2 as application A . 70
Table 51 – Type of B40 combined with D1 and D2 as application B . 70
Table 52 – Dimensions of B40 bayonet locking . 72
Table 53 – Mechanical codings of B40 connectors . 72
Table 54 – Dimensions of B40 mechanical codings . 74
Table 55 – Dimensions of contact positioning of the D1 data module . 76
Table 56 – Dimensions of contact positioning of the D2 data module . 78
Table 57 – Connectors dimensions in mated and locked position . 79
Table 58 – Gauges . 83
Table 59 – Climatic category . 84
Table 60 – Voltage proof . 84
Table 61 – Rated impulse voltage and pollution degree . 85
Table 62 – Insertion loss requirements . 86
Table 63 – Return loss requirements . 87
Table 64 – Near-end cross talk requirements . 87
Table 65 – Far-end cross talk requirements . 87
Table 66 – Transverse conversion loss requirements . 88
Table 67 – Transverse conversion transfer loss requirements . 88
Table 68 – Transfer impedance requirements . 88
Table 69 – Coupling attenuation requirements . 89
Table 70 – Power sum alien NEXT requirements . 89
Table 71 – Power sum alien FEXT requirements . 89
Table 72 – Propagation delay requirements . 90
Table 73 – Number of cycles of mechanical operations . 90
Table 74 – Minimum axial test force . 91
Table 75 – Maximum insertion and withdrawal forces . 91
Table 76 – Polarization insertion force . 91
Table 77 – Maximum locking and unlocking torque . 92
Table 78 – Number of test specimens and contacts . 93
Table 79 – Test group P . 96
Table 80 – Test group AP . 96
Table 81 – Test group BP . 99
Table 82 – Test group CP . 100
Table 83 – Test group DP . 101
Table 84 – Test group EP . 101
Table 85 – Test group FP . 102
IEC 61076-2-118:2026 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Connectors for electrical and electronic equipment -
Product requirements -
Part 2-118: Circular connectors - Detail specification for free and fixed
connectors with bayonet-locking size B12, B17, B23 and B40, for power,
signal and data transmission
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
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6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
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shall not be held responsible for identifying any or all such patent rights.
IEC 61076-2-118 has been prepared by subcommittee 48B: Electrical connectors, of IEC
technical committee 48: Electrical connectors and mechanical structures for electrical and
electronic equipment. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
48B/3196/FDIS 48B/3205/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
IEC 61076-2-118:2026 © IEC 2026
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 61076 series, published under the general title Connectors for
electrical and electronic equipment - Product requirements, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
IEC 61076-2-118:2026 © IEC 2026
INTRODUCTION
IEC SC 48B – Electrical connectors IEC 61076-2-118 ED1
Specification available from:
IEC General secretariat
or from the addresses shown on the inside cover.
DETAIL SPECIFICATION in accordance with IEC 61076-1
Circular connectors
With bayonet-locking
Size B12, B17, B23 and
B40, for power, signal and
data transmission
B12: 2-way power, 2 or
4-way data;
B17: 2 to 5-way power, 0 or
2-way signal, 2 or 4-way
data;
B23: 4 or 5-way power, 0 or
2-way signal, 2 or 4-way
data;
B40: 5-way power, 2 or
4-way data
Female (power and signal) +
male (data) and male (power
and signal) + female (data)
connectors
Female (power and signal)
+ female (data) and male
(power and signal) + male
(data) connectors
Male and female contacts
Rewirable
Non-rewirable
Free connectors, straight
and angled
Fixed connectors, flange
mounting and single hole
mounting
___________
...