kSIST FprEN IEC 63138-4:2025

SLOVENSKI STANDARD
oSIST prEN IEC 63138-4:2025
01-julij-2025
Večkanalni radiofrekvenčni konektorji - 4. del: Področna specifikacija za okrogle
konektorje vrste l32-4 in l32-5
Multi-channel radio frequency connectors - Part 4: Sectional specification for type l32-4
and l32-5 circular connectors
Connecteurs pour fréquences radioélectriques multicanaux - Partie 4: Spécification
intermédiaire pour les connecteurs circulaires de type l32-4 et l32-5
Ta slovenski standard je istoveten z: prEN IEC 63138-4:2025
ICS:
33.120.30 Radiofrekvenčni konektorji RF connectors
(RF)
oSIST prEN IEC 63138-4:2025 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 63138-4:2025
oSIST prEN IEC 63138-4:2025
46F/704/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 63138-4 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-05-09 2025-08-01
SUPERSEDES DOCUMENTS:
46F/663/CD, 46F/689/CC
IEC SC 46F : RF AND MICROWAVE PASSIVE COMPONENTS
SECRETARIAT: SECRETARY:
United States of America Mr John Morelli
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for Vote
(CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which t hey are
aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries” clau ses to
be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC c lauses.
(SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Multi-channel radio frequency connectors - Part 4: Sectional specification for type L32-4 and L32-5 circular
connectors
PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

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CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Mating face and gauge information . 7
4.1 Mating face dimensions . 7
4.1.1 Connector with pin contact . 7
4.1.2 Connector with socket contact . 9
4.1.3 Mating face of RF channel . 11
4.2 Gauges . 12
4.2.1 Gauge for socket centre contact . 12
4.2.2 Gauge for L32-5 connector with 5 pin contacts . 13
4.2.3 Gauge for L32-4 connector with 4 pin contacts . 13
4.2.4 Gauge for L32-5 connector with 5 socket contacts . 14
4.2.5 Gauge for L32-4 connector with 4 socket contacts . 15
5 Quality assessment procedure . 16
5.1 General . 16
5.2 Rating and characteristics . 17
5.3 Quality assessment . 18
5.3.1 General . 18
5.3.2 Inspection procedure . 18
5.3.3 Lot-by-lot inspection. 20
5.3.4 Periodic inspections . 20
6 Instructions for preparation of detail specifications . 21
6.1 General . 21
6.2 Identification of the component . 21
6.3 Performance . 22
6.4 Marking, ordering information and related matters . 22
6.5 Selection of tests, test conditions and severities . 22
6.6 Blank detail specification pro-forma for L32 series circular connector . 23
7 Marking . 26
7.1 Marking of component . 26
7.2 Marking and contents of package . 26

Figure 1 – L32-5 connector with 5 pin contacts . 7
Figure 2– L32-4 connector with 4 pin contacts . 8
Figure 3 – L32-5 connector with 5 socket contacts . 9
Figure 4 – L32-4 Connector with 4 socket contacts . 10
Figure 5 – Mating face of RF channel . 11
Figure 6 – Gauge for socket contact of RF channel . 12
Figure 7 –Gauge for L32-5 connector with 5 pin contacts . 13
Figure 8 –Gauge for L32-4 connector with 4 pin contacts . 14
Figure 9 –Gauge for L32-5 connector with 5 socket contacts . 15
Figure 10 –Gauge for L32-4 connector with 4 socket contacts . 16

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Table 1 – Dimensions of L32-5 connector with 5 pin contacts . 7
Table 2 – Dimensions of L32-4 connector with 4 pin contacts . 8
Table 3–Dimensions of L32-5 connector with 5 socket contacts . 9
Table 4–Dimensions of L32-4 connector with 4 socket contacts . 10
Table 5 – Dimensions of the mating face of RF channel . 11
Table 6 – Dimensions of gauge for socket contact . 12
Table 7 –Dimensions of gauge for L32-5 connector with 5 pin contacts . 13
Table 8 –Dimensions of gauge for L32-4 connector with 4 pin contacts . 14
Table 9 – Dimensions of gauge for L32-5 connector with 5 socket contacts . 15
Table 10 – Dimensions of gauge for L32-4 connector with socket contacts . 16
Table 11 – Rating and characteristics . 17
Table 12 – Qualification inspection . 19
Table 13 – Lot-by-lot inspection . 20
Table 14 – Sampling plans for mechanical compatibility and return loss inspection . 20
Table 15 – Periodic inspection . 20

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MULTI-CHANNEL RADIO-FREQUENCY CONNECTORS –

Part 4: Sectional specification
for type L32-4 and L32-5 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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services carried out by independent certification bodies.
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
members of its technical committees and IEC National Committees for any personal injury, property damage or
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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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
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the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 63138-4 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
This This edition cancels and replaces IEC 61169-59:2017. This edition constitutes a
technical revision.
a) Use IEC 63138-1:2019 as its generic specification instead of using IEC 61169-1:2013;
b) All the sub-clauses and test methods are in line with IEC 63138-1:2019;
c) Dimension “g” in Table 3, Table 4, Table 7 and Table 8 have been changes from “0,00 min
to 0,8 max” to “1,60 min to 2,1 max”
The text of this International Standard is based on the following documents:

oSIST prEN IEC 63138-4:2025
IEC CDV 63138-4 © IEC 2025 – 5 –

Draft Report on voting
46F/XX/FDIS 46F/XX/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 radio frequency
channel connector,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.
IMPORTANT – The "colour inside" logo on the cover page of this document
indicates that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
oSIST prEN IEC 63138-4:2025
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1 MULTI-CHANNEL RADIO-FREQUENCY CONNECTORS –
3 Part 4: Sectional specification for type L32-4 and L32-5 circular
4 connectors
7 1 Scope
8 This part of IEC 63138, which is a sectional specification (SS), provides information and rules
9 for the preparation of detail specifications (DS) for type L32-4 and L32-5 threaded multi-coaxial
10 radio frequency connector with anti mismating mechanism, 50Ω nominal impedance. The
11 operating frequency of each channel is up to 4GHz. These connectors have been widely used
12 in mobile communication system like TD-SCDMA and TD-LTE, and can also be used in some
13 similar equipment.
15 It also prescribes mating face dimensions for general connectors-grade 2, gauging information
16 and tests selected from IEC 63138-1, applicable to all detail specifications relating to type L32-
17 4 and L32-5 multi-coaxial connectors.
19 This sectional specification provides information and rules for the preparation of detail
20 specifications for type L32-4 and L32-5 multi-coaxial connectors together with the proforma
21 blank detail specification.
22 NOTE Metric dimension are original dimensions.
23 All undimensioned pictorial configurations are for reference purpose only.
25 2 Normative references
26 The following documents are referred to in the text in such a way that some or all of their content
27 constitutes requirements of this document. For dated references, only the edition cited applies.
28 For undated references, the latest edition of the referenced document (including any
29 amendments) applies.
31 IEC 63138-1:2019,Multi-channel radio-frequency connectors – Part 1:Generic specification −
32 General requirements and test methods
33 3 Terms and definitions
34 For the purposes of this document, the terms and definitions given in IEC 63138-1 apply.
35 ISO and IEC maintain terminological databases for use in standardization at the following
36 addresses:
37 • IEC Electropedia: available at https://www.electropedia.org/
38 • ISO Online browsing platform: available at https://www.iso.org/obp

oSIST prEN IEC 63138-4:2025
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39 4 Mating face and gauge information
40 4.1 Mating face dimensions
41 4.1.1 Connector with pin contact
42 4.1.1.1 L32-5 connector with 5 pin contacts
43 The mating face of L32-5 connector with 5 pin contacts is shown as figure 1 and its dimensions are
44 shown as table 1.
0°
B
Main groove
36°
Note6
C
144°
108°
5Pin EQS
0.1 A B C
Note5
180°
2Supplementary groove
Note3
Note2
Note1
Note4
A
216°
46 NOTE 1 Mechanical and electrical reference plane.
47 NOTE 2 Chamfer of the three supplementary grooves is optional.
48 NOTE 3 The mating face of RF channel with pin contact is shown in Figure 5a) in 4.1.3 and its dimensions are
49 shown in Table5.
50 NOTE 4 The shape of seal ring is optional.
51 NOTE 5 Anti-mismating pin.
52 NOTE 6 The initial position number of the RF channel with pin contact and the other positions numbered clockwise.
53 Figure 1 – L32-5 connector with 5 pin contacts
54 Table 1 – Dimensions of L32-5 connector with 5 pin contacts
Dimensions
mm
Ref.
Min. Max.
a 6,0 6,1
b 6,0 6,2
c 7,5 7,6
d M32X1,5-6g
e 14,4 14,5
f 6,0 --
g 9,5 9,7
h 24,0 --
k 27, 0 27,1
m 2,1 2,2
n 16,5
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55 4.1.1.2 L32-4 connector with 4 pin contacts
56 The mating face of L32-4 connector with 4 pin contacts is shown as figure 2 and its dimensions are
57 shown as table 2.
D
D-D
0°
B
Main groove
Note6
36°
Note5
D
D
144°
C
108°
D
D
5Pin EQS
0.1 A B C
180°
Supplementary groove
Note3
Note2
Note4
Note1
216°
A
D
60 NOTE 1 Mechanical and electrical reference plane.
61 NOTE 2 Chamfer of the three supplementary grooves is optional.
62 NOTE 3 The mating face of RF channel with pin contact is shown in Figure 5a) in 4.1.3 and its dimensions are
63 shown in Table5.
64 NOTE 4 The shape of seal ring is optional.
65 NOTE 5  Anti-mismating pin.
66 NOTE 6 The initial position number of the RF channel withsocket contact and the other positions numbered anti-
67 clockwise.
68 Figure 2– L32-4 connector with 4 pin contacts
69 Table 2 – Dimensions of L32-4 connector with 4 pin contacts
Dimensions
mm
Ref.
Min. Max.
a 6,0 6,1
b 6,0 6,2
c 7,5 7,6
d M32X1,5-6g
e 14,4 14,5
f 6,0 --
g 9,5 9,7
h 24,0 --
k 27,0 27,1
m 2,1 2,2
n 16,5
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71 4.1.2 Connector with socket contact
72 4.1.2.1 L32-5 connector with 5 socket contacts
73 The mating face of L32-5 connector with 5 socket contacts is shown as figure 3 and its
74 dimensions are shown as table 3.
0°
B
Main key
36°
Note5
Note4
1 144°
108°
C
5Socket EQS
0.1 A B C
Note2
2Supplementary key
180°
Note3
Note1
A
216°
76 NOTE 1 Mechanical and electrical reference plane.
77 NOTE 2 The mating face of RF channel with socket contact is shown in Figure 5b) in 4.1.3 and its dimensions are
78 shown as table 5.
79 NOTE 3 Anti-mismating socket.
80 NOTE 4 The shape of main keys is optional.
81 NOTE 5 The initial position number of the RF channel with socket contact and the other positions numbered anti-
82 clockwise.
83 Figure 3 – L32-5 connector with 5 socket contacts
84 Table 3–Dimensions of L32-5 connector with 5 socket contacts
Dimensions
mm
Ref.
Min. Max.
a 6,25 6,35
b 7,0 --
c 7,7 7,8
d M32 ×1,5-7 H
e 14,2 14,3
f 7,6 8,0
g 1,6 2,1
h 6,8 --
i 0,08 0,3
j 11,5 11,7
k 26,6 26,7
l 34,9 35,0
m 1,9 2,0
n 16,5
p 5,8 6,1
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85 4.1.2.2 L32-4 connector with 4 socket contacts
86 The mating face of L32-4 connector with 4 socket contacts is shown as figure 4 and its dimensions are
87 shown as table 4.
D
D-D
0°
B
Main key
Note3
36°
Note4
Note5
D
D
144°
C
108°
D
D
5Socket EQS
180°
0.1 A B C
Note2
2Supplementary key
Note1
216°
A
D
89 NOTE 1 Mechanical and electrical reference plane.
90 NOTE 2 The mating face of RF channel with socket contact is shown in Figure ) in 4.1.3 and its dimensions are
91 shown in Table 5.
92 NOTE 3 Anti-mismating socket.
93 NOTE 4 The shape of main keys is optional.
94 NOTE 5 The initial position number of the RF channel with socket contact and the other positions numbered anti-
95 clockwise.
96 Figure 4 – L32-4 Connector with 4 socket contacts
97 Table 4–Dimensions of L32-4 connector with 4 socket contacts
Dimensions
mm
Ref.
Min. Max.
a 6,25 6,35
b 7,0 --
c 7,7 7,8
d M32 ×1,5-7 H
e 14,2 14,3
f 7,6 8,0
g 1,6 2,1
h 6,8 --
i 0,08 0,3
j 11,5 11,7
k 26,6 26,7
l 34,9 35,0
m 1,9 2,0
n 16,5
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Dimensions
mm
Ref.
Min. Max.
p 5,8 6,1
98 4.1.3 Mating face of RF channel
99 The mating face of the RF channel with pin contact is shown in Figure 5a), the mating face of the RF
100 channel with socket contact is shown in Figure 5b),and their dimensions are shown in Table 5.
Note1
Note1
Detail A
60°
Note2
Detail A
102 a) RF channel with pin contact
Note1
Note1
Detail A
60°
Note2
Detail A
104 b) RF channel with socket contact
105 NOTE1: Mechanical and electrical reference plane.
106 NOTE2: The position of floating outer conductor in free state and its slot design is optional.
107 Figure 5 – Mating face of RF channel
108 Table 5 – Dimensions of the mating face of RF channel
Dimensions
mm
Ref.
Min. Max.
a 0,00 0,25
b 0,00 0,25
c 1,27 --
d -- 2,54
f 0,902 0,935
g 0,00 0,10
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Dimensions
mm
Ref.
Min. Max.
h 0,00 0,25
i 0,08 0,30
j 2,67 --
k 0,00 0,25
a
-- --
l
b
m -- --
c
n 0,3 --
a
When mating with pinΦ0,902mm～Φ0,935mm, it shall meet the mechanical and electrical requirements.
b
Slot design is optional, but it shall meet the mechanical and electrical requirements.

c 0,2mm～0,3mm of radial displacement is allowed when mating with RF channel with pin contact.
109 4.2 Gauges
110 4.2.1 Gauge for socket centre contact
111 The gauge for the socket contact of RF channel is shown in Figure 6 and its dimensions are shown in
112 Table 6.
114 Figure 6 – Gauge for socket contact of RF channel
115 Table 6 – Dimensions of gauge for socket contact
Gauge C
Gauge A Gauge B
（For retention purpose）
(For sizing purpose) (For insertion purpose)
+2
Mass of gau
...