Page 11 - LJT _ HE308 _ Mil DTL 38999 Series I

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11
Amphenol
LJT / HE 308
Insert arrangements
Arrangements
of contacts
Hermetic
(Y)
Service
Rating
Total
Contacts
Number and Size of Contacts
22D 20 16 12 12 Coax 8 power 8 coax 8 twinax 4 00
21-35
-
M
79
79
21-39
-
I
39
37
2
21-41
-
I
41
41
21-48
-
4
4
21-75
-
N
4
21-79
-
II
19
17
2
23-P1 (23-01)
-
1
1
23-21
Pin only
II
21
21
23-35
-
M
100
100
23-53
-
I
53
53
23-55
-
I
55
55
25-04
-
I
56
48
8
25-07
-
M
99
97
2
25-19
-
I
19
19
25-24
-
I
24
12 12
25-29
-
29
29
25-35
-
M
128
128
25-37
-
I
39
37
25-43
Pin only
I
43
23 20
25-46
-
I
46
40
4
2
25-61
Pin only
I
61
61
25-1 A (25-44)
-
M
8
4
4
(see note 4)
(see note 5)
Bold letters: Preferred arrangement.
Note 4: MS connector 21-75 is supplied with four size 8 twinax contacts.
Proprietary connector 21-75 is supplied with 4 size 8 coax contacts.
Note 5: MS connector 21-79 has provision for 2 size 8 coax contacts.
Coax contacts are not supplied unless specifed by customer.
To avoid cross-plugging problems in applications that require the use of more than one MIL-DTL-38999 I connector of
the same size, alternate key-rotations are available as indicated in the chart below. As shown in the following diagram
the master key rotates in the shell, and the insert always remains in the same position relative to the minor keys.
Shell size
AB Angle of rotation (degrees)
Normal
A B C D
9
95°
77°
-
-
113°
11
95°
81°
67°
123°
109°
13
95°
75°
63°
127°
115°
15
95°
74°
61°
129°
116°
17
95°
77°
65°
125°
113°
19
95°
77°
65°
125°
113°
21
95°
77°
65°
125°
113°
23
95°
80°
69°
121°
110°
25
95°
80°
69°
121°
110°
Coding
AB angles shown are
viewed from the front
face of the connector,
a receptacle is shown
beside. The angles for
the plug are exactly the
same except the direction
of rotation is opposite of
that shown for the recep-
tacle.
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Technical
Characteristics