Amphenol 348 Series
High Density Connectors
®
12-093-6
MIL-C-81511, Series I, II
Amphenol
Table of Contents
348 Series
Page No.
High Density Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Insert Availability and Identification, Alternate Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Insert Arrangements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4, 5
348-36E (M81511/26E),
348-46E (M81511/06E) straight plug
........................................... 6
348-30E (M81511/21E),
348-40E (M81511/01E) square flange receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
348-33E (M81511/23E),
348-43E (M81511/03E) single hole mounting receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
348-31E (M81511/25E),
348-41E (M81511/05E) cable receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Accessories – Cable Clamp, Dummy Receptacle
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Accessories – Protection Caps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Contacts – Power and Shielded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Contact Sealing Plugs, Application Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
How to Order
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14, 15
Sales Office Listing
This catalog covers Amphenol
®
348 Series Connectors. For additional information on Amphenol
®
products, or for special
application requirements, contact your local Amphenol sales office or -
Amphenol Corporation
Amphenol Aerospace
40-60 Delaware Avenue
Sidney, New York 13838-1395
Telephone: 607-563-5011
Fax: 607-563-5157
www.amphenol-aerospace.com
Data printed in blue pertains only to Series I, Long.
Data printed in black pertains to Series II, Standard or both
Series I and II as the catalog situation dictates.
Amphenol Aerospace is a certified ISO 9001 Manufacturer.
348 Series
high density connectors
The Amphenol
®
348 Series connector
provides reliability and high contact
density. Qualified to MIL-C-81511,
these connectors can accommodate a
minimum of three circuits to a maxi-
mum of one hundred and fifty five cir-
cuits.
Amphenol
®
348 Series connectors
are available in two basic construc-
tions: Long (Series I) and Standard
(Series II). The Series I features
100%
scoop-proof
construction
(potential contact damage minimized
by recessed pins). Series II, Standard
connectors are scoop-proof when the
pin contacts are specified in the
receptacle shell only.
Each construction, Series I and
Series II, features a single one-piece
molded dielectric retention system
that locks the contacts in place. The
contacts are crimp type, either power
or shielded, and available in sizes 12,
16, 20 and 23-28 or 23-22 with wire
size accommodations from 12
through 32 AWG.
square flange
receptacle
square flange
receptacle
The Amphenol
®
348 Series is a light-
weight, compact connector offered in
4 shell styles: straight plug, square
flange receptacle, single hole mount-
ing receptacle and cable receptacle. It
is environmentally resistant and will
operate at sea level to a voltage of
600 VAC (RMS). It will perform under
high temperature vibration, testing
through 150°C (see specifications on
page 2).
MIL-C-81511
Series I
MIL-C-81511
Series II
straight plug
straight plug
single hole
mounting
receptacle
single hole
mounting
receptacle
1
348 Series
specifications
Materials and Finishes:
pin contact (standard) -
copper base alloy, gold plated per 50
micro inches min. per MIL-G-45204 over suitable underplate.
socket contact (standard) -
copper base alloy, gold plated per
MIL-G-45204 over suitable underplate. Hood material is stainless
steel.
shell -
aluminum alloy finish for E class connectors - cadmium plate
over suitable underplate.
inserts -
high grade dielectric material
Maintenance Aging -
All contacts shall be removed and installed
for 10 cycles. After 10th cycle, contact insertion and retention
forces are as shown in table:
Unlocked
Insertion Force
lbs.
Maximum
Removal Force
lbs.
Minimum
Maximum
Locked
Retention
Force lbs.
Minimum
Fluid Immersion -
Unmated connectors shall be immersed fully in
fluids specified in table. At least one connector must be immersed
in each fluid type. After the immersion period and a drying period of
1 hour, the connectors must remain completely functional.
Fluids for fluid immersion
Connector Class
Fluids
E
MIL-H-5606
MIL-L-23699
Moisture Resistance -
Mated connectors shall have an insulation
resistance of 500 megohms or greater at 25°C after moisture test-
ing per MIL-STD-202, method 106.
Thermal Shock -
Connectors shall remain completely functional
after being subjected to the temperature extremes specified below:
Low Temperature
+ 0°
–65°C
– 3°
High Temperature
+ 3°
+150°C
– 0°
Contact
Size
23*
20
16
12
12
20
25
30
3
3
4
5
17
23
23
23
10
15
25
25
Test Condition*
F
* Tested in accordance with method 1003, of MIL-STD-1344 per test conditions
listed.
* Applies to both 23-28 and 23-22 contact sizes.
Durability -
After 500 mating-unmating cycles at a maximum rate
of 300 cycles per hour, connectors shall not show any damage det-
rimental to the operation of the connector.
Corrosion -
After salt spray testing per method 1001, condition B,
MIL-STD-1344 connectors shall show no exposure of basis metal
which will affect performance.
Dielectric Withstanding Voltage -
Connectors shall show no evi-
dence of breakdown or flashover when subjected to the test volt-
ages and altitudes specified in table. Corona shall not be
considered as breakdown. (Sea level tests performed per method
3001 of MIL-STD-1344; Altitude tests per method 1005, condition
C, of MIL-STD-202).
Test Voltage (ac, rms, not working voltage)
Simulated
Altitude Condition
Mated
Unmated
Vibration -
Connectors shall undergo vibration testing per method
2005, test condition IV, MIL-STD-1344 in low and high temperature
extremes of preceding table with all contacts connected in series,
and a current flow of 100 milliamperes. There shall be no circuit
interruption longer than 1 micro-second.
Physical Shock -
The application of 1/2 sine-wave transient shock
impulses of 50 gravity units to 3 planes for 11 milli-seconds, with
test voltage applied to series connected contacts, shall result in no
discontinuity longer than 1 micro-second. Connectors shall not be
damaged, parts shall not become loose.
Temperature Life -
Mated connectors shall perform satisfactorily
after being subjected to ambient temperatures specified, per class
for 1000 hrs.
EMI Shielding Effectiveness -
As measured in a triaxial EMI leak-
age tester, connector shells with grounding springs shall exhibit a
radio frequency attenuation equal to or greater than the following:
Frequency (MHz)
Leakage Atten. (db)
Sea Level
50,000 feet
70,000 feet
110,000 feet
1800
1000
1000
1000
1500
550
375
200
100
300
800
1000
65
55
45
45
Maximum recommended working voltage, ac, rms
Condition
Sea Level
50,000 feet
70,000 feet
110,000 feet
600
300
300
300
2
348 Series
insert availability and identification
alternate positions
Insert Availability
Insert
Arrangement
Series I
Series II
MS
Code
Service
Rating
Total
Contacts
Contact Size
23*
20
16
12
Alternate Positions
To avoid cross-plugging problems in applications requiring the use of
more than one 348 Series connector of the same size and arrange-
ment, alternate positions are available as indicated in the charts below.
A plug with a given position number (1 through 6) will mate with a
receptacle with the same position number. The angular rotation A, B, C
or D is the same whether the connector has pin or socket inserts.
Inserts are not rotated in relation to the master key/keyway.
Shown below is a view from the front face of a receptacle. The view for
the front face of a plug is the same except the direction of rotation of
the angles is opposite of that shown for the receptacle.
8-04
10-03
10-05
10-12
14-04
14-09
14-19
14-37
16-07
16-14
16-27
16-55
18-09
18-21
18-38
18-85
20-11
20-24
20-45
20-92
22-14
22-32
22-61
22-121
24-19
24-41
24-74
24-155
8-04
10-03
10-05
10-12
14-04
14-09
14-19
14-37
16-07
16-14
16-27
16-55
18-09
18-21
18-38
18-85
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
A01
B03
B02
B01
D04
D03
D02
D01
E04
E03
E02
E01
F04
F03
F02
F01
G04
G03
G02
G01
H04
H03
H02
H01
J04
J03
J02
J01
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
4
3
5
12
4
9
19
37
7
14
27
55
9
21
38
85
11
24
45
92
14
32
61
121
19
41
74
155
4
3
5
12
4
9
19
37
7
14
27
55
9
21
38
85
11
24
45
92
14
32
61
121
19
41
74
155
Series II, Standard
Angular Location
Shell
Key and
Size 8
Keyway
Position
A°
Shell Size 10 and 14
A°
B°
C°
D°
A°
Shell Size 16 and 18
B°
C°
D°
* Applies to both 23-28 and 23-22 contact sizes.
1
2
3
4
5
6
128
190
205
220
235
250
105
102
80
35
64
35
140
132
118
140
155
115
215
248
230
205
235
220
265
320
312
275
304
270
105
18
92
84
24
98
140
149
152
152
135
152
215
192
222
204
199
268
265
259
342
334
240
338
Series I, Long
Angular Location
Key and
Keyway
Position
Shell Size 8
A°
B°
C°
D°
A°
Shell Size 10 and 14
B°
C°
D°
Shell Size 16, 18, 20, 22, 24
A°
B°
C°
D°
1
2
3
4
5
6
105
102
80
35
64
91
140
132
118
140
155
131
215
248
230
205
234
197
265
320
312
275
304
240
95
113
90
53
119
51
141
156
145
156
146
141
208
182
195
220
176
184
236
292
252
255
298
242
80
135
49
66
62
79
142
170
169
140
145
153
196
200
200
200
180
197
293
310
244
257
280
272
3
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