IEC 63138-3:2022

IEC 63138-3 ®
Edition 1.0 2022-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Multi-channel radio frequency connectors –
Part 3: Sectional specification for MQ5 series circular connectors

Connecteurs radiofréquences multicanaux –
Partie 3: Spécification intermédiaire relatives aux connecteurs circulaires de
série MQ5
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IEC 63138-3 ®
Edition 1.0 2022-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Multi-channel radio frequency connectors –

Part 3: Sectional specification for MQ5 series circular connectors

Connecteurs radiofréquences multicanaux –

Partie 3: Spécification intermédiaire relatives aux connecteurs circulaires de

série MQ5
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.120.30 ISBN 978-2-8322-1083-6

– 2 – IEC 63138-3:2022 © IEC 2022
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Mating face and gauge information . 6
4.1 Mating face dimensions . 6
4.1.1 MQ5 socket connector . 6
4.1.2 MQ5 plug connector . 8
4.1.3 Mating face of RF channel . 11
4.2 Gauges . 12
4.2.1 Gauge for RF channel. 12
4.2.2 Gauge rings for plug outer contact . 13
4.2.3 Gauge for MQ5 socket connector . 14
4.2.4 Gauge for MQ5 plug connector . 15
5 Quality assessment procedure . 17
5.1 General . 17
5.2 Rating and characteristics . 17
5.3 Quality assessment . 19
5.3.1 General . 19
5.3.2 Inspection procedure . 20
5.3.3 Lot-by-lot inspection . 21
5.3.4 Periodic inspections . 22
6 Instructions for preparation of detail specifications . 23
6.1 General . 23
6.2 Identification of the component . 23
6.3 Performance . 23
6.4 Marking, ordering information and related matters . 23
6.5 Selection of tests, test conditions and severities . 23
6.6 Blank detail specification pro-forma for MQ5 series circular connector . 24
7 Marking . 28
7.1 Marking of component . 28
7.2 Marking and contents of package . 28

Figure 1 – MQ5 socket connector . 7
Figure 2 – MQ5 quick lock plug connector . 9
Figure 3 – MQ5 threaded plug connector . 10
Figure 4 – Mating face of RF channel . 11
Figure 5 – Gauge for socket contact of RF channel . 13
Figure 6 – Gauge for plug outer contact . 14
Figure 7 – Gauge for MQ5 socket connector . 15
Figure 8 – Gauge for MQ5 plug connector . 16

Table 1 – Dimensions of MQ5 socket connector . 8
Table 2 – Dimensions of MQ5 quick lock plug connector . 9
Table 3 – Dimensions of MQ5 threaded plug connector . 10

Table 4 – Dimensions of RF channel . 12
Table 5 – Dimensions of gauge for socket contact . 13
Table 6 – Dimensions of gauge for outer contact . 14
Table 7 – Dimensions of gauge for MQ5 socket connector . 15
Table 8 – Dimensions of gauge for MQ5 plug connector . 17
Table 9 – Rating and characteristics . 18
Table 10 – Qualification inspection . 20
Table 11 – Lot-by-lot inspection . 21
Table 12 – Sampling plans for mechanical compatibility and return loss inspection . 21
Table 13 – Periodic inspection . 22

– 4 – IEC 63138-3:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MULTI-CHANNEL RADIO FREQUENCY CONNECTORS –

Part 3: Sectional specification for MQ5 series circular 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
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 63138-3 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/602/FDIS 46F/614/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.
A list of all parts in the IEC 63138 series, published under the general title Multi-channel radio
frequency connectors, 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,
• replaced by a revised edition, or
• amended.
– 6 – IEC 63138-3:2022 © IEC 2022
MULTI-CHANNEL RADIO FREQUENCY CONNECTORS –

Part 3: Sectional specification for MQ5 series circular connectors

1 Scope
This part of IEC 63138, which is a sectional specification (SS), provides information and rules
for the preparation of detail specifications (DS) for MQ5 series circular connectors with five RF
channels, as well as a detailed specification of the blank format.
An MQ5 series circular connector with 50 Ω nominal impedance has five RF channels that can
be engaged and disengaged at the same time. There are two versions of plug connectors, one
is a quick-lock version, and the other is a threaded version. The socket connector provides two
coupling mechanisms, a quick-lock and a threaded coupling.
MQ5 series circular connectors can be used in mobile communication systems and in other
communication equipment.
This document also specifies the mating face dimensions and gauging information of MQ5
series circular connectors, and tests selected from IEC 63138-1, applicable to all detail
specifications relating to MQ5 series circular connectors.
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 63138-1:2019, Multi-channel radio-frequency connectors – Part 1:Generic specification −
General requirements and test methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 63138-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.elsctropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Mating face and gauge information
4.1 Mating face dimensions
4.1.1 MQ5 socket connector
The mating face of MQ5 socket connectors is shown in Figure 1 and its dimensions are shown
in Table 1.
NOTE 1 Mechanical reference plane.
NOTE 2 Chamfer of the four supplementary grooves is optional.
NOTE 3 Chamfer of the main groove is optional.
NOTE 4 The mating face of RF channel with pin contact is shown in Figure 4a) and its dimensions are shown in
Table 4.
NOTE 5 The shape of seal ring is optional.
NOTE 6 The initial position number of the RF channel with pin contact and the other positions numbered clockwise.
Figure 1 – MQ5 socket connector

– 8 – IEC 63138-3:2022 © IEC 2022
Table 1 – Dimensions of MQ5 socket connector
Dimensions
mm
Ref.
Min. Max.
a 31,75 31,80
b 30,35 30,40
c M30 × 1 tolerance 6 g
d 6,80 7,00
e 26,42 26,48
f 6,00 --
g R3,0 nom.
h 7,95 8,05
i 10,95 11,00
j 1,50 1,80
k 19,30 19,45
n 13,90 14,00
p 3,20 3,35
q 1,65 1,75
r 0,50 0,60
s 7,28 7,32
t 15,48 15,52
u 10,30 10,90
4.1.2 MQ5 plug connector
4.1.2.1 MQ5 quick lock plug connector
The mating face of a MQ5 connector with quick lock type is shown in Figure 2 and its dimensions
are shown in Table 2.
NOTE 1 Mechanical reference plane.
NOTE 2 The mating face of RF channel with socket contact is shown in Figure 4b) and its dimensions are shown in
Table 4.
NOTE 3 The shape of four supplementary keys is optional.
NOTE 4 The shape of main key is optional.
NOTE 5 The shape of spring finger is optional.
NOTE 6 The initial position number of the RF channel with socket contact and the other positions numbered anti-
clockwise.
Figure 2 – MQ5 quick lock plug connector
Table 2 – Dimensions of MQ5 quick lock plug connector
Dimensions
Ref. mm
Min. Max.
a -- 42,00
b 31,80 31,90
c 30,05 30,15
d 26,30 26,40
e 8,40 8,60
f 1,20 1,50
g 11,00 11,10
h 6,60 6,80
i 15,48 15,52
j 13,70 13,80
k 7,52 7,58
m 3,00 3,15
n 1,40 1,50
– 10 – IEC 63138-3:2022 © IEC 2022
4.1.2.2 MQ5 threaded plug connector
The mating face of a MQ5 threaded plug connector is shown in Figure 3 and its dimensions are
shown in Table 3.
NOTE 1 Mechanical reference plane.
NOTE 2 The mating face of RF channel with socket contact is shown in Figure 4b) and its dimensions are shown in
Table 4.
NOTE 3 The shape of the four supplementary keys is optional.
NOTE 4 The shape of main keys is optional.
NOTE 5 The initial position number of the RF channel with socket contact and the other positions numbered anti-
clockwise.
Figure 3 – MQ5 threaded plug connector
Table 3 – Dimensions of MQ5 threaded plug connector
Dimensions
Ref. mm
Min. Max.
a 7,52 7,58
b 26,35 26,40
c M30 × 1 tolerance 6 H
d 1,20 1,50
e 5,20 5,60
f 11,20 --
i 7,00 --
j 13,70 13,80
k 15,48 15,52
m 3,00 3,15
n 1,40 1,50
p 32,0 nom
4.1.3 Mating face of RF channel
The mating face of the RF channel with pin contact is shown in Figure 4a), the mating face of
the RF channel with socket contact is shown in Figure 4b), and their dimensions are shown in
Table 4.
a) RF channel with pin contact

b) RF channel with socket contact
NOTE Mechanical reference plane.
Figure 4 – Mating face of RF channel

– 12 – IEC 63138-3:2022 © IEC 2022
Table 4 – Dimensions of RF channel
Dimensions
mm
Ref.
Min. Max.
a 1,17 1,23
b 5,90 5,93
c R1,00 nom
d 0,35 0,65
e 2,60 2,90
f 3,30 3,70
g 0 0,25
h 0,75 1,00
i 1,70 --
j 0 0,25
k 0 0,25
m 3,00 --
a
n -- --
p 1,8 nom
b
-- 6,40
q
r 3,80 --
u 6,60 6,70
v 2,00 2,20
a
-- --
s
a
Slot design optional when mating with a pin with Φ1,17 mm to Φ1,23 mm. It should
meet the mechanical and electrical performance requirements.
b
Expand to meet the requirements with gauge rings for socket outer contact.

4.2 Gauges
4.2.1 Gauge for RF channel
4.2.1.1 Socket centre contact
4.2.1.2 Dimensions of the gauge
The gauge for the socket contact of RF channel is shown in Figure 5 and its dimensions are
shown in Table 5.
Figure 5 – Gauge for socket contact of RF channel
Table 5 – Dimensions of gauge for socket contact
Gauge C
Gauge A Gauge B
（For retention purpose）
(For sizing purpose) (For insertion purpose)
+2
Ref. Mass of gauge：40 g
mm mm mm
Min. Max. Min. Max. Min. Max.
a 1,235 1,240 1,230 1,235 1,165 1,170
b 0,700 1,000 0,900 1,200 0,900 1,200
Material: Polished steel, cylindrical surface roughness of diameter a: Ra≤0,4 μm.

4.2.1.3 Test procedure
Test procedure as follows.
a) Sizing test
Insert gauge A into centre contact three times, the depth of insertion is not less than 0,7 mm;
this is sizing operation.
b) Insertion test
After the sizing operation, insert gauge B into centre contact; the insertion force shall not
exceed 6 N.
c) Retention test
After the sizing or insertion operation, the gauge C shall be inserted into the socket centre
contact. The contact shall retain the mass of the gauge C in a vertical downward position.
4.2.2 Gauge rings for plug outer contact
4.2.2.1 Dimensions of the gauge
The gauge for the outer contact of RF channel is shown in Figure 6 and its dimensions are
shown in Table 6.
– 14 – IEC 63138-3:2022 © IEC 2022

Figure 6 – Gauge for plug outer contact
Table 6 – Dimensions of gauge for outer contact
Gauge C
Gauge A Gauge B
（For retention purpose）
(For sizing purpose) (For insertion purpose)
+2
Ref. Mass of gauge：400 g
mm mm mm
Min. Max. Min. Max. Min. Max.
a 5,880 5,885 5,895 5,900 5,930 5,935
b 7,250 7,350 7,250 7,350 7,250 7,350
c 6,700 6,800 6,700 6,800 6,700 6,800
d 2,700 3,000 2,700 3,000 2,700 3,000
v 1,55 1,65 1,55 1,65 1,55 1,65
Material: Polished steel, cylindrical surface roughness of diameter a: Ra≤0,4 μm.

4.2.2.2 Test procedure
Test procedure is a follows.
a) Sizing test
Insert gauge A into the outer contact of RF channel three times, the depth of insertion is not
less than 2,7 mm; this is sizing operation.
b) Insertion test
After the sizing operation, if specified in the detail specification, the force necessary to fully
insert the gauge B into the outer contact shall be measured and it shall not exceed 15 N.
c) Retention test
After the sizing or insertion operation, the gauge C shall be inserted into the outer contact.
The contact shall retain the mass of the gauge C in a vertical downward position.
4.2.3 Gauge for MQ5 socket connector
4.2.3.1 Dimensions of the gauge
The gauge for the MQ5 socket connector is shown in Figure 7 and its dimensions are shown in
Table 7.
NOTE 1 Mechanical reference plane.
NOTE 2 The shape of the four supplementary keys is optional.
NOTE 3 The shape of the main key is optional.
Figure 7 – Gauge for MQ5 socket connector
Table 7 – Dimensions of gauge for MQ5 socket connector
Dimensions
mm
Ref.
Min. Max.
a 7,52 7,58
b 5,00 --
c 1,20 1,50
d 15,48 15,52
e 26,35 26,40
f 13,70 13,80
m 3,00 3,15
n 1,40 1,50
4.2.3.2 Test procedure
The gauge should be inserted into the MQ5 socket connector three times, and then the insertion
force is measured; the insertion force should not be more than 80 N.
4.2.4 Gauge for MQ5 plug connector
4.2.4.1 Dimensions of the gauge
The gauge for the MQ5 plug connector is shown in Figure 8 and its dimensions are shown in
Table 8.
– 16 – IEC 63138-3:2022 © IEC 2022

NOTE 1 Mechanical and electrical reference plane.
NOTE 2 Chamfer of four supplementary grooves is optional.
NOTE 3 Chamfer of main groove is optional.
Figure 8 – Gauge for MQ5 plug connector

Table 8 – Dimensions of gauge for MQ5 plug connector
Dimensions
mm
Ref.
Min. Max.
a -- 7,30
b 5,88 5,90
c 3,70 --
d 10,90 11,00
e 26,42 26,48
f 29,80 30,00
g 10,50 10,60
h 3,30 3,70
j R1,00 nom
p 13,90 14,00
t 15,48 15,52
m 3,20 3,35
n 1,60 1,75
u 6,50 6,70
v 1,55 1,65
4.2.4.2 Test procedure
The gauge should be inserted into the MQ5 plug connector three times, and then the insertion
force is measured; the insertion force should not be more than 80 N.
5 Quality assessment procedure
5.1 General
Subclause 5.2 to Subclause 5.3.4 provide the recommended rating, performance and test
conditions to be considered when preparing a detail specification. They also specify the test
schedules and procedures appropriate to the corresponding quality inspection level.
5.2 Rating and characteristics
The values indicated below are recommended for MQ5 series circular connector, and are given
for the writer of the detail specification. They are applicable for the condition when the
connectors are fully mated. The preferable characteristics can be seen in Table 9.
Certain tests are listed without any recommended values being given when they are not required.
When such tests are required, appropriate values shall be entered in the detail specification at
the discretion of the specification writer.

– 18 – IEC 63138-3:2022 © IEC 2022
Table 9 – Rating and characteristics
Test method Remarks, deviation
Rating and characteristics IEC 63138-1:2019 Value from standard test
Subclause method
Electrical
Nominal impedance 50 Ω
a
DC ∼ 6 GHz
Frequency range
Return loss 8.4.1 ≥26 dB (DC at 3 GHz) Each RF channel
tested separately
≥19 dB (3 GHz to 6 GHz)
b
8.4.3 Each RF channel
Centre contact resistance
tested separately
– initial ≤3,0 mΩ
– after conditioning ≤5,0 mΩ
Outer conductor resistance 8.4.3 Each RF channel
tested separately
– initial ≤2,0 mΩ
– after conditioning ≤3,0 mΩ
b
8.4.4 Each RF channel
Insulation resistance
tested separately
– initial ≥5000 MΩ
– after conditioning ≥200 MΩ
c d
8.4.5 1 000 V (86 to 106) KPa, Test
Voltage proof at sea level
each RF channel
separately
e
8.4.6 ≥90 dB, up to 3 GHz Z ≤ 10 mΩ, Each RF
Screening effectiveness
t
channel tested
≥70 dB, 3 GHz to 6 GHz
separately
RF power rating 8.4.10 150 W at 2 GHz, cw
Discharge test 8.4.7 See DS Each RF channel
tested separately
Isolation 8.4.9 ≥90 dB, 0,05 GHz to Test between two
6 GHz adjacent channels
Intermodulation level (PIM3) 8.4.8 ≥160 dBc Each RF channel
tested separately
Frequency: 0 GHz to
2,7 GHz
Power:2 × 20 W
Mechanical
Centre contact captivation 8.5.2 Each RF channel
tested separately
See DS
– axial force After the test, the
centre contact meets
– axial torque
the requirement for
the dimension of the
mating face
RF channel captivation 8.5.3 Test each RF channel
with socket centre
contact separately
– axial force ≥240 N After the test, RF
channels of the
connector meet the
requirement for the
dimension of the
mating face
Test method Remarks, deviation
Rating and characteristics IEC 63138-1:2019 Value from standard test
Subclause method
Engagement and disengagement forces 8.5.4
– axial force (engagement)  ≤120 N (quick lock type)
– axial force (disengagement) ≤120 N (quick lock type)
– torque  ≥25 N·m (threaded type)
Gauge retention(resilient contacts) 8.5.5
– centre contact ≥0,4 N See 4.2.1
– outer contact ≥4 N See 4.2.2
Mechanical compatibility 8.3.4 Insertion force ≤80 N See 4.2.3 and 4.2.4
Mechanical test for cable clamping
device
– cable rotation (nutation of cable end) 8.5.6 See DS
– cable pulling 8.5.7 See DS
– cable bending 8.5.8 See DS
– cable torsion 8.5.9 See DS
Strength of coupling mechanism 8.5.10 Axial force: ≥450 N
Coupling torque
resistance: ≥30 N·m
(threaded type)
High frequency vibration 8.5.12
100 m/s (10 to 2 000) Hz
Shock 8.5.13
500 m/s , 1/2 sine wave,
11 ms
Environmental
f
Climatic category A:40/85/21
Hermetic sealed 8.6.6 na
Leakage 8.6.5
Salt mist 8.6.7 48 h Duration of the
spraying,test after
mating
Endurance
Mechanical endurance 8.5.14 100 operations
a
These values apply to basic connectors. In practice, these may be influenced by the cable used and reference
should always be made to the actual values given in the DS.
b
Values for a single pair of RF channels.
c
Voltages are RMS values of AC at 40 Hz to 65 Hz, unless otherwise specified.
d
Some cables usable with these connectors have ratings lower than the values given here.
e
When interfaces are fully mated.
f
For certain connectors, the upper temperature limit is restricted by the cable characteristics. Reference should
be made to the relevant cable specification.

5.3 Quality assessment
5.3.1 General
Quality assessment shall be performed according to IEC 63138-1, except for the provisions in
5.3.2 to 5.3.4.
– 20 – IEC 63138-3:2022 © IEC 2022
5.3.2 Inspection procedure
Table 10 describes the qualification inspection tests to be performed.
Table 10 – Qualification inspection
IEC 63138-1:2019 Number of
Test
Subclause specimens
Group1
Visual examination 8.2
Marking 8.2
Workmanship 8.2
Dimensions and interchangeability 8.3
RF channel interface dimensions 8.3.1
Connector interface dimensions 8.3.2
Outline dimensions 8.3.3 6
Mechanical compatibility 8.3.4
Engagement and disengagement forces 8.5.4
a
Gauge retention force 8.5.5
Hermetic seal 8.6.6
Leakage 8.6.5
Insulation resistance 8.4.4
Group 2
Centre contact captivation 8.5.2
RF channel captivation 8.5.3 2
Salt mist 8.6.7
Group 3
Return loss 8.4.1
Insertion loss 8.4.2
Isolation 8.4.9
Screening effectiveness 8.4.6
Passive Intermodulation level (PIM) 8.4.8
b
8.4.10
RF power rating
High temperature endurance 8.6.3
Low temperature endurance 8.6.4
Mechanical endurance 8.5.14
Safety wire hole pullout 8.5.15
Group 4
Contact resistance 8.4.3
Voltage proof 8.4.5
Discharge test 8.4.7
Low frequency vibration 8.5.11
High frequency vibration 8.5.12
Shock 8.5.13
Thermal shock 8.6.2
Damp heat, steady state 8.6.1
Effectiveness against cable rotation 8.5.6
Effectiveness against cable pulling 8.5.7
Effectiveness against cable bending 8.5.8
Effectiveness against cable torsion 8.5.9
Strength of coupling mechanism 8.5.10

IEC 63138-1:2019 Number of
Test
Subclause specimens
Group 5
c
Solderability 8.5.1
a
The sample size of RF channels for the test of the gauge retention force is 3 sets
of RF channels.
b
The tests are performed only for the initial qualification approval if the qualified
connectors have not been modified in their design and manufacturing processes.
c
The test shall be performed using 3 sets of piece-parts individually taken from the
lot before being assembled into connectors.

5.3.3 Lot-by-lot inspection
The group A and B tests shall be subject to the inspections specified in Table 11 and in the
order given in the said table.
Table 11 – Lot-by-lot inspection
IEC 63138-1:2019 Number of
Test
Subclause specimens
Group A
Visual examination 8.2
Marking 8.2
Workmanship 8.2
Dimensions and interchangeability 8.3
Interface dimensions for RF channels 8.3.1
Interface dimensions for connectors 8.3.2
Outline dimensions 8.3.3 100 %
Mechanical compatibility 8.3.4
Engagement and disengagement forces 8.5.4
a
8.5.5
Gauge retention force
Hermetic seal 8.6.6
Leakage 8.6.5
Insulation resistance 8.4.4
Group B
Mechanical compatibility 8.3.4
See Table 12
Return loss 8.4.1
a
The sample size of RF channels for the gauge retention force test is 3 sets of RF
channels.
Table 12 – Sampling plans for mechanical compatibility and return loss inspection
Sample size for mechanical Sample size for return loss
Lot size
compatibility inspection inspection
a
1 to 100 1
101 to 1 200 5 2
1 201 to above 10 3
a
When the lot size is 1, the corresponding sample size is also 1.

– 22 – IEC 63138-3:2022 © IEC 2022
5.3.4 Periodic inspections
Table 13 describes the periodic tests to be performed.
Table 13 – Periodic inspection
IEC 63138-1:2019
Test Sample size
Subclause
Group D1 1
Centre contact captivation 8.5.2 6
RF channel captivation 8.5.3 7
Salt mist 8.6.7 8
Group D2 1
Return loss 8.4.1
Insertion loss 8.4.2
Isolation 8.4.9
Screening effectiveness 8.4.6
Passive intermodulation level (PIM ) 8.4.8
a
RF power rating 8.4.10
High temperature endurance 8.6.3
Low temperature endurance 8.6.4
Mechanical endurance 8.5.14
Safety wire hole pullout 8.5.15
Group D3 1
Contact resistance 8.4.3
Discharge test 8.4.7
Low frequency vibration 8.5.11
High frequency vibration 8.5.12
Shock 8.5.13
Thermal shock 8.6.2
Damp heat, steady state 8.6.1
Effectiveness against cable rotation 8.5.6
Effectiveness against cable pulling 8.5.7
Effectiveness against cable bending 8.5.8
Effectiveness against cable torsion 8.5.9
Strength of coupling mechanism 8.5.10
Group D4
b
8.5.1
Solderability
a
The tests are performed only for the initial qualification approval if the qualified
connectors have not been modified in their design and manufacturing processes.
b
The test shall be performed using 3 sets of piece-parts individually taken from the
lot before being assembled into connectors.

6 Instructions for preparation of detail specifications
6.1 General
Detail specification (DS) writers shall use the appropriate blank detail specification (BDS).
Clause 6 comprises the BDS dedicated for use with MQ5 series circular connectors. As such,
the BDS will already have information entered on it in relation to:
– the basic specification number applicable to all the detail specifications covering connector
styles of the series covered by the sectional specification;
– the connector series designation.
The specification writer should enter the details relating to the connector style to be covered by
the BDS, as indicated. The numbers in brackets in the BDS correspond to the following
indications, which shall be given.
6.2 Identification of the component
(1) Enter the following details:
– style: the style designation of the connector including type of fixing and sealing if
applicable;
– attachment: by deletion of the inapplicable options of cable/wire given for centre and
outer conductors.
– special features and markings: as applicable.
– series designation: in bold characters/digits approximately 15 mm high.
(2) Enter details of assessment level and the climatic category.
(3) A reproduction of the outline drawing and details of the panel piercing (if applicable). It shall
provide the maximum envelope dimensions, also the position of the reference plane and, in
the case of a fixed connector, the position of the mounting plane, relative to the front face
of the connector.
(4) Any maximum panel thickness limitations for fixed connectors shall be stated.
(5) Particulars of all variants covered by the DS. As appropriate, the information shall include:
– cable types (or sizes) applicable to each variant;
– alternative plated or protective finishes;
– details of alternative mounting flanges having either tapped or plain mounting holes.
– details of alternative solder spills or solder buckets including, when applicable, those for
use with microwave integrated circuit (MIC) components.
6.3 Performance
(6) Performance data listing the most important characteristics of the connector in accordance
with the requirements of the relevant sectional specification. Deviations from the minimum
requirements shall be clearly indicated. Non-applicable parameters shall be marked "na".
6.4 Marking, ordering information and related matters
(7) Insert marking and ordering information as appropriate, together with details of related
documents and any invoked structural similarity.
6.5 Selection of tests, test conditions and severities
(8) "na" shall be used to indicate non-applicable tests. All tests marked "a" by the detail
specification writer shall be mandatory.
When using the normal procedure with a dedicated BDS, the letter "a" – for applicable – shall
be entered in the "test required" column opposite each of the tests indicated as being mandatory
in the test schedule of the relevant sectional specification. Any additional test required at the
discretion of the specification writer shall also be indicated by an "a".

– 24 – IEC 63138-3:2022 © IEC 2022
The specification writer shall also indicate, when necessary, details of deviations from the
standard test methods and conditions including any relevant deviations given in the test
schedule of the sectional specification.
6.6 Blank detail specification pro-forma for MQ5 series circular connector
Subclause 6.6 contains the complete BDS.
(1) (2) Page 1 of
(3) ELECTRONIC COMPONENT OF ASSESSED (4) Issue
QUALITY IN ACCORDANCE WITH:
GENERIC SPECIFICATION: IEC 63138-1
SECTIONAL SPECIFICATION: IEC 63138-3
(5) Detail specification for radio frequency coaxial connector of
Type
assessed quality
MQ5
Style Special features and markings
Method of cable/wire+ attachment Centre conductor – solder/crimp+
Outer conductor – solder/clamp/crimp+
+Delete as appropriate
(6) Assessment level Characteristic impedance …Ω Climatic category …/…/…
(7) Outline and maximum dimensions Panel piercing and mounting details

(8) Variants
Description of
Variant No IEC 63138-3
variant
Information about manufacturers who have components qualified under the IECQ Conformity Assessment System
is available through the IECQ on-line certificate system.

(9) Performance (including limiting conditions of use)
IEC 63138-1: Remarks including any
Variant no.
Ratings and characteristics 2019 Value deviations from standard
designation
Subclause test methods
Electrical
Nominal impedance  50 Ω
Frequency range  DC∼6 GHz
Return loss 01 8.4.1 GHz Measurement frequency
range
GHz
GHz
GHz
Centre contact resistance 8.4.3 ≤    mΩ Initial
≤    mΩ After conditioning
Insulation resistance 8.4.4 ≥    GΩ Initial
≥    GΩ After conditioning
+ Voltage proof at sea level 01 8.4.5 kV 86 kPa to 106 kPa
kV
kV
kV
+ Voltage proof at 4,4 kPa 01 8.4.5 kV kPa (if not 4,4 kPa)
kV
kV
kV
Screening effectiveness 01 8.4.6 dB at GHz Z ≤  mΩ
t
dB at GHz
Z ≤  mΩ
t
dB at GHz
Z ≤  mΩ
t
dB at GHz
Z ≤  mΩ
t
Discharge test (corona) at sea level 8.4.7 Extinction Atmospheric pressure
voltage
≥    V
≥    V
≥    V
≥    V
Isolation 01 8.4.9 ≥  dB
Intermodulation level (PIM3) 8.4.8 dBm at GHz Under 2 carries of
+43 dBm
ADDITIONAL ELECTRICAL
CHARACTERISTICS
+ Voltage values are RMS values at 40 Hz to 65 Hz, unless otherwise specified.

– 26 – IEC 63138-3:2022 © IEC 2022
IEC 63138-1: Remarks including any
Variant No.
Ratings and characteristics 2019 Value deviations from standard
Designation
Subclause test methods
Mechanical
Soldering 8.5.1
Gauge retention resilient contacts 8.5.5
– inner contact  N
– outer contact  N
Centre contact captivation 8.5.2
– axial force  N
– permitted displacement in each  mm
direction
– torque  N·m
Outer contact captivation 8.5.3 N
Engagement and separation forces 8.5.4
and torques
– axial force  ≤N
– torque  ≤N·m
Mechanical compatibility 8.3.4 ≤N
Effectiveness of clamping device 8.5.6 Rotations Bend radius and number of
against cable rotation (nutation of revolutions
cable end)
………mm No. ………
………mm No. ………
………mm No. ………
………mm No. ………
Effectiveness of clamping device 8.5.7 Point of application and
against cable pulling duration
N ………mm………s
N ………mm………s
N ………mm………s
N ………mm………s
Effectiveness of clamping device 8.5.8 Length of cable and mass
against cable bending
cycles ………mm………Kg
cycles ………mm………Kg
cycles ………mm………Kg
cycles ………mm………Kg
Effectiveness of clamping device 8.5.9 Duration of applied torque
against cable torsion
N·m …………s
N·m …………s
N·m …………s
N·m …………s
Strength of coupling mechanism 8.5.10 N
High frequency vibration 8.5.12 (  g acceleration)
m/s
n
(∼) Hz
Shock 8.5.13 (  g acceleration)
m/s
n
shape
ms
...