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LEMO unipole and multipole connectors
This catalogue gives the complete description of LEMO unipole and multipole type connectors. The LEMO manufacturing
programme has been extended to almost 40 series divided into 7 product families with specific mating and environmental
characteristics. Each series includes a wide variety of plug, socket, coupler and bridge plug models, available in contact
configurations adapted to all round cables, including up to 114 conductors, and a maximum diameter of 30 mm.
Watertight and vacuumtight models are also available. Since LEMO connectors are perfectly screened and designed to
guarantee very low resistance to shell electrical continuity, they are particularly adapted to applications where electro-
magnetic compatibility (EMC) is important.
Table of Contents
3 steps to select the right connector................................................................................................................................................................................
3
B Series (indoor, keyed)
Part Numbering system ......................................................................................................................................................................................... 13
Metal Housing models............................................................................................................................................................................................ 14
Elbow socket models..............................................................................................................................................................................................25
Plastic housing models...........................................................................................................................................................................................28
Watertight or vacuumtight models.......................................................................................................................................................................... 30
Bridge models........................................................................................................................................................................................................ 34
Threaded-latching models...................................................................................................................................................................................... 35
Alignment Key and Polarized Keying System........................................................................................................................................................ 36
K Series (outdoor, keyed)
Part Numbering system.......................................................................................................................................................................................... 38
Metal Housing models............................................................................................................................................................................................ 39
Watertight or vacuumtight models.......................................................................................................................................................................... 47
Alignment Key and Polarized Keying System........................................................................................................................................................ 49
T Series (outdoor, keyed)
Part Numbering system.......................................................................................................................................................................................... 52
Chrome-plated Housing models............................................................................................................................................................................. 53
Watertight or vacuumtight models.......................................................................................................................................................................... 55
Plastic housing models, alignment Key and Polarized Keying System..................................................................................................................56
B, K and T Series
Insert configuration, Housings, Insulators, Contacts, Collets, Variant..................................................................................... 57
S Series (indoor, stepped insert)
Part Numbering system ......................................................................................................................................................................................... 75
Metal Housing models............................................................................................................................................................................................ 76
Elbow socket models..............................................................................................................................................................................................87
Plastic housing models...........................................................................................................................................................................................89
Watertight or vacuumtight models.......................................................................................................................................................................... 91
E Series (outdoor, stepped insert)
Part Numbering system.......................................................................................................................................................................................... 94
Metal Housing models............................................................................................................................................................................................ 95
Watertight or vacuumtight models........................................................................................................................................................................ 101
L Series (outdoor, stepped insert)
Part Numbering system........................................................................................................................................................................................ 104
Metal Housing models.......................................................................................................................................................................................... 105
Watertight or vacuumtight models........................................................................................................................................................................ 109
Alignment Key and Polarized Keying System...................................................................................................................................................... 109
S, E and L Series
Insert configuration, Housings, Insulators, Contacts, Collets, Variant................................................................................... 111
2G Series (indoor, keyed)...............................................................................................................................................................................................134
2C Series (indoor, stepped insert).................................................................................................................................................................................141
M Series (outdoor, keyed)..............................................................................................................................................................................................
149
F Series (outdoor, keyed)...............................................................................................................................................................................................
150
Spare parts......................................................................................................................................................................................................................
152
Accessories.....................................................................................................................................................................................................................
160
Tooling.............................................................................................................................................................................................................................
173
Panel cut-outs and PCB drilling pattern.......................................................................................................................................................................
179
Cable assembly
(B, K, T, S and E series)....................................................................................................................................................................... 191
Technical characteristics...............................................................................................................................................................................................
205
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Precision modular connectors to suit your application
Over 75’000 connectors
Since it’s creation in Switzerland in 1946 the LEMO Group has been recognized as a global leader of circular Push-Pull
connectors and connector solutions. Today LEMO and its affiliated companies, REDEL and COELVER, are active in
more than 80 countries with the help of over 40 subsidiaries and distributors.
The modular design of the LEMO range provides over 75’000 connectors from miniature ø 3 mm to ø 50 mm, capable of
handling cable diameters up to 30 mm and for up to 114 contacts.
This vast portfolio enables you to select the ideal connector configuration to suit almost any specific requirement in most
markets, including medical devices, test and measurement instruments, machinery, audio video broadcast, telecommuni-
cations and military.
This self-latching system is renowned worldwide for its easy and quick mating and unmating features. It provides absolute
security against vibration, shock or pull on the cable, and facilitates operation in a very limited space.
LEMO’s Push-Pull Self-Latching Connection System
The LEMO self-latching system allows the connector
to be mated by simply pushing the plug axially into
the socket.
Once firmly latched, connection cannot be broken by
pulling on the cable or any other component part other
than the outer release sleeve.
When required, the connector is disengaged by a
single axial pull on the outer release sleeve.
This first disengages the latches and then withdraws
the plug from the socket.
UL Recognition
CE marking
RoHS
LEMO connectors are recognized by the Underwriters Laboratories (UL). The approval of the complete system (LEMO
connector, cable and your equipment) will be easier because LEMO connectors are recognized.
CE marking
means that the appliance or equipment bearing it complies with the protection requirements of one or
several European safety directives. CE marking
applies to complete products or equipment,
but not to electrome-
chanical components, such as connectors.
LEMO connector specifications conforms the requirements of the RoHS directive (2011/65/EU) of the European Parlia-
ment and the latest amendments. This directive specifies the restrictions of the use of hazardous substances in electrical
and electronic equipment marketed in Europe.
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3 steps to select the right connector
l
Step 1: Select connector series
Select the appropriate LEMO connector series according to the environmental parameters that will affect your device
or cable such as indoor, outdoor, temperature range, ingress protection of the mated connector and of your device.
Use the table shown on page 4.
Part number coding
.
.
.
B, K, T, S, E, L, G or C
l
Step 2: Select connector size
Use the section (mm
2
) or the AWG of your cable wire to select the optimal contact diameter (values vary between
solder, crimp or print contact), see page 8.
Use this optimal contact diameter to determine the right connector size as well as the insert configuration, see page 6.
Part number coding
.
.
0, 1, 2, 3, 4, 5 or 6
.
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Step 3: Complete the part number
Now that you know the series, as well as the insulator configuration, complete the part numbering system with the help
of the following table.
Part number coding
.
.
.
Model
B Series (indoor, keyed)
K Series (outdoor, keyed)
T Series (outdoor, keyed)
S Series (indoor, stepped insert)
E Series (outdoor, stepped insert)
L Series (outdoor, keyed, stepped insert)
G Series (indoor, keyed)
C Series (indoor, stepped insert)
14
39
53
76
95
105
135
142
Series
14
39
53
76
95
105
135
142
Insert
configuration
57
57
57
111
111
111
137
145
Housing
material
64
64
64
120
120
120
137
146
Insulator
material
64
64
64
120
120
120
134
141
Contact
64
64
64
120
120
120
137
146
Collet
67
68
70
123
127
129
138
146
Variant
71
71
71
130
130
130
138
147
Note:
Figures in the above table refer to the catalogue pages.
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