IEC 63295:2022

IEC 63295 ®
Edition 1.0 2022-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specification for WB series glass beads with 50 Ω impedance for RF connectors

Spécification pour perles en verre de série WB à impédance de 50 Ω pour
connecteurs RF
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IEC 63295 ®
Edition 1.0 2022-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specification for WB series glass beads with 50 Ω impedance for RF connectors

Spécification pour perles en verre de série WB à impédance de 50 Ω pour

connecteurs RF
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.120.30 ISBN 978-2-8322-1081-8

– 2 – IEC 63295:2022 © IEC 2022
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Structure dimensions and IEC type designation . 5
5 Quality assessment procedure . 6
5.1 General . 6
5.2 Ratings and characteristics . 6
5.3 Test schedule and inspection requirements. 9
5.3.1 Acceptance tests . 9
5.3.2 Periodic tests . 10
5.4 Procedures for quality conformance . 12
5.4.1 Quality conformance inspection . 12
5.4.2 Quality conformance and its maintenance . 12
6 Marking . 12
6.1 Marking of components . 12
6.2 Marking and contents of package . 13
Annex A (Informative) Type designation . 14
Annex B (Informative) Typical applications . 15
Annex C (Informative) Test fixture . 16
C.1 Test fixture. 16
C.2 Dimensions for test fixture . 16

Figure 1 – Structure of WB series glass beads . 6
Figure B.1 – WB series glass bead used in PCB to connect with RF connector . 15
Figure B.2 – WB series glass bead used in PCB as an inner conductor of an RF
connector . 15
Figure C.1 – Test fixture . 16
Figure C.2 – Test fixture . 17

Table 1 – Dimensions of WB series glass beads . 6
Table 2 – Ratings and characteristics . 7
Table 3 – Acceptance tests . 10
Table 4 – Periodic tests . 11
Table C.1 – Test fixtures per type of glass-bead . 16
Table C.2 – Dimensions of test fixtures . 17

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFICATION FOR WB SERIES GLASS BEADS
WITH 50 Ω IMPEDANCE FOR RF CONNECTORS

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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rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 63295 has been prepared by subcommittee 46F: RF and microwave passive components,
of IEC technical committee 46: Cables, wires, waveguides, RF connectors, RF and microwave
passive components and accessories. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
46F/597/FDIS 46F/611/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
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/standardsdev/publications.

– 4 – IEC 63295:2022 © IEC 2022
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,
• replaced by a revised edition, or
• amended.
SPECIFICATION FOR WB SERIES GLASS BEADS
WITH 50 Ω IMPEDANCE FOR RF CONNECTORS

1 Scope
This document provides the requirements for WB series glass beads with 50 Ω impedance for
RF connectors, including, among other, the structure dimensions, IEC type designation, rating
and characteristics, and quality assessment.
These glass beads are used for the adaption of coaxial systems to microstrip circuits used
extensively in microwave communication systems such as TR modules, power modules,
integrated circuits where hermetic seal is required. They can serve as a part of an RF coaxial
connector, multi-channel RF connector or hybrid connector, or can be applied directly in various
communication module systems as an independent product. They provide a 50 Ω normative
impedance with an operating frequency limit up to 65 GHz.
2 Normative references
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.
IEC 61169-1:2013, Radio frequency connectors – Part 1: Generic specification – General
requirements and measuring methods
IEC 62153-4-7, Metallic communication cable test methods – Part 4-7: Electromagnetic
compatibility (EMC) – Test method for measuring of transfer impedance Z and screening
T
attenuation a or coupling attenuation a of connectors and assemblies up to and above 3 GHz
S C
– Triaxial tube in tube method
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Structure dimensions and IEC type designation
The structure of WB series glass beads is shown in Figure 1 and the dimensions are shown in
Table 1.
– 6 – IEC 63295:2022 © IEC 2022
Dimensions in millimetres
Figure 1 – Structure of WB series glass beads
Table 1 – Dimensions of WB series glass beads
a b c d
NO d Recommended applicable
Type designation D B (MIN) C
e
connector series
mm mm mm mm
1 WB0.23 0,230 ± 0,010 - - - SMPM ,1.85 and 2.4
2 WB0.3 0,300 ± 0,015 - - -
SMP, 2.92, 2.4, SSMA and SMA
3 WB0.38 0,380 ± 0,015 - - -
4 WB0.45 0,450 ± 0,015 - - -
2.92，SSMA and SMA
5 WB0.5 0,500 ± 0,015 - - -
6 WB0.9 0,900 ± 0,020 - - - SMA and TNC
a
Type designation is shown in Annex A.
b
The diameter is selected assuming that the dielectric constant of glass is 4,0, and a 50 Ω characteristic
impedance can be obtained.
c
Size shall meet the requirements for electrical and mechanical performances.
d
Size and shape of the terminal are optional, and shall meet the requirements for electrical and mechanical
performances.
e
Typical applications of WB glass beads with RF connector series are shown in Annex B.

5 Quality assessment procedure
5.1 General
Subclauses 5.2 to 5.4 provide glass beads’ recommended ratings, performance and test
conditions. They also provide an appropriate schedule of tests with minimum levels of
conformance inspection sampling.
As WB series glass beads are the accessories of RF connectors, most of the test methods of
IEC 61169-1 can be used when WB series glass beads are tested in the test fixture shown in
Annex B.
5.2 Ratings and characteristics
The values indicated below are recommended for WB series glass beads. They are applicable
for the glass beads when they are tested in the test fixture shown in Annex B. Ratings and
characteristics are given in Table 2.

Certain tests are listed without any recommended values being given. These tests will usually
not be required.
Table 2 – Ratings and characteristics
IEC61169-1:2013
Remarks, deviations from
Ratings and characteristics Values
Subclauses test
standard test method
method
Electrical
Nominal impedance 50 Ω
Frequency range
– WB0.23 DC to 65 GHz
– WB0.3 DC to 40 GHz
– WB0.38 DC to 26,5 GHz
– WB0.45 DC to 18 GHz
– WB0.5 DC to 18 GHz
– WB0.9 DC to 6 GHz
DC to 6 GHz ≥ 25 dB
12,4 GHz to 18 GHz
≥ 19 dB
The test fixture shall be in
18 GHz to 26,5 GHz
Return loss 9.2.1
≥ 18 dB accordance with Annex C
26,5 GHz to 40 GHz
≥ 16 dB
40 GHz to 65 GHz ≥ 14 dB
b
Centre contact resistance 9.2.3 na
b
Outer contact resistance 9.2.3
na
a
9.2.2
Rated voltage at sea level
– WB0.23 85 V
– WB0.3 170 V
– WB0.38 250 V (86 to 106) kPa
– WB0.45 250 V
– WB0.5 250 V
– WB0.9 500 V
a
Rated voltage at 4,4 kPa
– WB0.23 21 V
– WB0.3 45 V
– WB0.38 4,4 kPa approximately
65 V
equivalent to 20 km
– WB0.45 65 V
– WB0.5 65 V
– WB0.9 125 V
Insulation resistance 9.2.5
– initial
• WB0.23
≥ 1 000 MΩ
• others
≥ 5 000 MΩ
– after conditioning
• WB0.23
≥ 1 000 MΩ
• others
≥ 5 000 MΩ
– 8 – IEC 63295:2022 © IEC 2022
IEC61169-1:2013
Remarks, deviations from
Ratings and characteristics Values
Subclauses test
standard test method
method
a
9.2.6 (86 to 106) kPa
Proof voltage at sea level
– WB0.23 500 V
– WB0.3 500 V
– WB0.38 750 V
– WB0.45 750 V
– WB0.5 750 V
– WB0.9 1 500 V
4,4 kPa approximately
a
Proof voltage at 4,4 kPa 9.2.6
equivalent to 20 km
– WB0.23 65 V
– WB0.3 170 V
– WB0.38 250 V
– WB0.45 250 V
– WB0.5 250 V
– WB0.9 500 V
Proof voltage (after environmental
9.2.6 (86 to 106) kPa
a
test at sea level)
– WB0.23 125 V
– WB0.3 250 V
– WB0.38 375 V
– WB0.45 375 V
– WB0.5 375 V
– WB0.9 750 V
b
Screening effectiveness IEC 62153-4-7
na
Discharge test (corona effect) 9.2.8 Extinction voltage at 4,4 kPa
– WB0.23 65 V
– WB0.3 125 V
– WB0.38 190 V
– WB0.45 190 V
– WB0.5 190 V
– WB0.9 375 V
Passive intermodulation level
b
9.2.9
na
(PIM)
Mechanical
Soldering 9.3.2
– bit size
Solderability 9.3.2.2 245 °C ± 5 °C, 5 S
Resistance to soldering heat 9.2.3.3 2 605 °C ± 5 °C, 10 S
Gauge retention force (resilient

contacts)
9.3.4
b
– centre contact
na
b
– outer contact
na
IEC61169-1:2013
Remarks, deviations from
Ratings and characteristics Values
Subclauses test
standard test method
method
Centre contact captivation
– axial force ≥2,22 N
9.3.5
– permitted displacement, in
displacement
each direction
b
– torque na
b
Engagement and separation 9.3.6
na
b
Strength of coupling mechanism 9.3.11
na
Effectiveness of cable fixing
against
b
– cable rotation 9.3.7
na
b
– cable pulling 9.3.8
na
b
– cable bending 9.3.9
na
b
– cable torsion 9.3.10
na
b
Bending moment 9.3.12
na
Bump 9.3.13
200 m/s
Vibration (20g , acceleration)

200 m/s
n
9.3.3
10 Hz to 2 000 Hz
Shock 9.3.14 (100g , acceleration)
1 000 m/s
n
1/2 sine wave
6 ms
Endurance
b
Mechanical endurance
9.3.15 na
High temperature endurance 9.4.5 250 h at 200 °C
Low temperature endurance 9.4.6 250 h at -65 °C
Environmental
Climatic category 9.4.2 65/200/56
b
Sealing non-hermetic
9.4.7 na
100 kPa to 110k Pa
-3 3
Hermetic 9.4.8
10 Pa·cm /s
differential
Water immersion 9.4.9 na
Salt mist 9.4.10 48 h Duration of spraying
Chemical contamination
b
Resistance to solvents and
na
contaminating fluids to be
9.4.11
used
Applicable fluids
b
Sulphur dioxide
9.4.12 na
a
Voltages are RMS values from 50 Hz-to 60 Hz, unless otherwise specified.
b
na: not applicable.
5.3 Test schedule and inspection requirements
5.3.1 Acceptance tests
Acceptance tests are shown in Table 3.

– 10 – IEC 63295:2022 © IEC 2022
Table 3 – Acceptance tests
IEC 61169‑1: Assessment level M (higher) Assessment level H (lower)
Test AQL Test AQL
IL Period IL Period
subclause required % required %
Group A1
Visual examination 9.1.1 a II 1 a S3 1,5
Group B1
Outline dimensions 9.1.2 a S4 0,4 a S3 4,0
Mechanical compatibility 9.1.2.2 na II na S3
Engagement and
Lot Lot
separation forces and 9.3.6 na S4 na S3
torques
Gauge retention
9.3.5 na II na S3
(resilient contacts)
by by
Insertion retention force
9.3.4
(resilient contacts)
Sealing
lot lot
-non-hermetic 9.4.7 na II na S3
-hermetic 9.4.8 a II 0,015 ia S3 0,025
Water immersion 9.4.9 ia II 0,015 ia S3 0,025
Voltage proof 9.2.6 a II 0,4 a II 4,0
Solderability (d) 9.3.2.2 ia S4 0,4 ia S3 4,0
Insulation resistance 9.2.5 a S4 0,4 a S3 4,0
Safety wire hole pullout 9.3.12 na S4  na S3
Key:
a – suggested as applicable
ia – test suggested (if technically applicable)
na – not applicable
IL – inspection level
AQL – acceptable quality level
(d) – destructive tests – specimens shall not be returned to stock

5.3.2 Periodic tests
Periodic tests are shown in Table 4. There are no group C tests for levels H and M.

Table 4 – Periodic tests
Assessment level M (higher) Assessment level H (lower)
IEC 61169‑1:
Test Number Permitted Period Test Number Permitted Period
required of failures required of failures
subclause
specimens per specimens per
a a
group group
Group D1 (d) 3 3
6 1 3 1
years years
Solderability 9.3.2.2 ia  ia
Resistance to
9.3.2.3 ia  ia
soldering heat
Mechanical
tests on cable
fixing
– cable rotation
9.3.7 na  na
(nutation)
– cable pulling 9.3.8 na  na
– cable bending 9.3.9 na  na
9.3.10 na  na
– cable torsion
3 3
Group D2 (d)  6 1 3 1
years years
Contact
9.2.3 na  na
resistance
Outer conductor
and screen
continuity
Centre
conductor
continuity
Vibration 9.3.3 a
Damp heat,
9.4.3 a  a
steady state
3 3
b b
Group D3  1 1
1 1
years years
Dimensions of
piece-parts and 9.1.2 a  a
materials
3 3
6 1
Group D4 (d) 3 1
years years
Mechanical
9.3.15 na  na
endurance
High
temperature 9.4.5 a  a
endurance
Discharge test 9.2.8 ia  ia
Climatic
9.4 ia  ia
conditioning
3 3
Group D5 (d)  6 1 3 1
years years
Voltage
standing wave 9.2.1 a  a
ratio
Water
9.4.9 na  na
immersion test
– 12 – IEC 63295:2022 © IEC 2022

Assessment level M (higher) Assessment level H (lower)
IEC 61169‑1:
Test Number Permitted Period Test Number Permitted Period
of failures of failures
required required
subclause
specimens per specimens per
a a
group group
3 3
Group D6 (d)  6 1 3 1
years years
Centre contact
9.3.5 a  a
captivation
Rapid change of
9.4.4 a  a
temperature
Climatic
9.4.2 a  a
sequence
3 3
c c
Group D7 (d)  -
1 1
years years
Salt mist 9.4.10 a
Key:
A – suggested as applicable
ia – test suggested (if technically applicable)
na – not applicable
(d) – destructive tests – specimens shall not be returned to stock
a
For qualification approval (QA), a total of two failures is only permitted for level H and 1 failure only for level M
from groups D1 to D7.
b
One set of piece-parts of each style and variant, unless using common piece parts.
c
Number of pairs for each solvent.

5.4 Procedures for quality conformance
5.4.1 Quality conformance inspection
This shall consist of test group A1 and B1 on a lot-by-lot basis.
5.4.2 Quality conformance and its maintenance
This still consists of three consecutive lots passing test groups A1 and B1 followed by a
selection of specimens from the lots as appropriate. These specimens shall successfully pass
the specified periodic D tests.
6 Marking
6.1 Marking of components
Each component shall be legibly and durably marked, where space permits, and in the following
order of precedence, with:
a) identity code of the manufacturer;
b) manufacturer's connector identification code or IEC connector designation.

6.2 Marking and contents of package
The package shall be marked with the information specified in 6.1 and, in addition, the following
information shall be given:
a) manufacturing date code;
b) any additional marking required by the relevant specification.
When required by the relevant specification, the package shall also include instructions for
assembling the connector(s) and instructions for the use of any special tools or materials, as
necessary.
– 14 – IEC 63295:2022 © IEC 2022
Annex A
(Informative)
Type designation
WB series glass beads are designated as follows:

Annex B
(Informative)
Typical applications
WB series glass beads used in PCBs as accessories of RF connectors are shown in Figure B.1
and Figure B.2.
Figure B.1 – WB series glass bead used in PCB to connect with RF connector

Figure B.2 – WB series glass bead used in PCB
as an inner conductor of an RF connector

– 16 – IEC 63295:2022 © IEC 20
...