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Watertight or vacuumtight models
These socket and coupler models allow the device on which they are fitted to reach a protection index of IP68 as per IEC
60529. They are fully compatible with plugs of the same series and are widely used for portable radios, military, laboratory
equipment, aviation, etc.
These models are identified by a letter ?P? at the end of the reference.
Most of these models are also available in a vacuumtight version. Such models are identified by an additional letter ?V? at
the end of the part number (certificate on request).
Epoxy resin is used to seal these models.
Technical Characteristics
Mechanical and Climatical
Characteristics
Value
Standard
Characteristics
Value
Standard
Endurance
Humidity
> 5000 cycles IEC 60512-5 test 9a
up to 95% at 60° C
0K
1K
60 bars
60 bars
Temperature range (0K-1K)
Temperature range (2K to 5K)
Salt spray corrosion test
Climatical category
- 20° C/+100° C
- 20° C/+80° C
> 144h IEC 60512-6 test 11f
20/80/21 IEC 60068-1
Maximum operating
pressure 2)
2K
3K
4K
5K
40 bars
30 bars
15 bars
5 bars
IEC 60512-7 test 14d
Leakage rate (He) 1)
< 10 -7 mbar.l.s -1 IEC 60512-7 test 14b
Note: 2) this value corresponds to the maximum allowed pressure differ-
Note:
1)
only for vacuumtight models.
ence for the assembled socket.
HGG Fixed socket, nut fixing, key (G) or keys
(A to F and L), watertight or vacuumtight
L maxi
S3
M
Reference
Dimensions (mm)
Model
HGG
HGG
HGG
HGG
Series
0K
1K
2K
3K
A
18
20
25
31
B
19.2
21.5
27.0
34.0
e
M14x1.0
M16x1.0
M20x1.0
M24x1.0
E
5.5
9.0
13.0
16.0
L
23.0
30.0
33.7
41.7
M
4.0
4.5
5.0
6.0
S1
12.5
14.5
18.5
22.5
S3
17
19
24
30
E maxi
S1
HGG
HGG
4K
5K
37
55
40.5
54.0
M30x1.0
M45x1.5
14.0
10.0
49.2
55.7
6.5
9.0
28.5
42.5
36
–
Note: the 5K series is delivered with a round nut.
HEG Fixed socket, nut fixing, key (G) or keys
(A to F and L), watertight or vacuumtight
(back panel mounting)
L maxi
P
S1
M
Reference
Dimensions (mm)
Model
Series
A
B
e
E
L
M
P
S1
HEG
HEG
HEG
0K
1K
2K
18 18 M14x1.0 3.4 23.0 3.5 7 12.5
20 20 M16x1.0 6.2 30.0 3.5 10 14.5
25 25 M20x1.0 5.0 33.7 3.5 10 18.5
www.lemo.com
E maxi
41
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