Hermetic Connectors
Glass Sealed Hermetic Connectors
PRESSURE CAPABILITIES OF SOLID OR INDIVIDUAL
GLASS BEAD CONNECTORS
MAXIMUM OPERATING PRESSURE (psi)
Users around the world have found that ITT Cannon
hermetic connectors function reliably under extreme
environmental conditions. Hermetic connectors are
impervious to most liquids and gases, including acids,
alkalis, oils, gasoline, jet fuel and hydraulic fluids. They
can take shock loads as high as 100 g’s with no loss in
hermeticity, and can take extremes of both heat and
cold with no loss of performance.
40,000
30,000
.500 WEB THICKNESS
20,000
10,000
Manufacturing Expertise
Cannon compression glass seals are strong. A 50,000
psi compression stress generates a sealing force that
can withstand up to 10,000 psi differential pressure
(pressure varies with connector type). Since it is
independent of adhesion, the seal has a temperature
capability of -260° to +450° Fahrenheit. The seal has
high radiation resistance and a leak rate of less than
10
-8
cc per second.
All ITT Cannon hermetic connectors are 100% tested
after fabrication. A stringent examination ensures that
all military specifications are met. The product is tested
for leak performance, dielectric withstanding voltage
and insulation resistance.
.250 WEB
THICKNESS
5,000
2,000
1,000
.125 WEB
THICKNESS
J
500
300
200
.25
.50
.75
1.00
1.25
1.50
1.75
Hermetic Connectors
DIAMETER OF GLASS BEAD
—————
————
——————
Failure due to bending
(35% of short time stress max)
Failure due to shear
(35% of short time stress max)
Dimensions shown in inches (mm)
Specifications and dimensions subject to change
J-2
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Hermetic Connectors
Compression Glass Seals
Glass is an ideal electrical insulating material for
connectors. Its mechanical strength readily supports
contacts. The compression seal is achieved by placing
a glass preform within the surrounding metal shell,
heating the glass and shell to the glass melting
temperature, and then cooling the assembly. As the
assembly cools, the glass becomes rigid and the metal
shell begins to compress the glass. This compression
provides a very high strength, high reliability hermetic
seal.
Table of Contents
Miniature Circular
KPTH / PVAH . . . . . . . . . . Page J-7 to J-12
Subminiature Circular
KJLY / KJY / KJAY. . . . . . . . Page J-7 to J-12
Custom Design Capabilities
Custom hermetic connectors can be manufactured to
meet special requirements. Hermetic connectors have
been developed to withstand exposure to propellants,
high pressure and high temperature conditions for
missiles, “sub-safe” connectors for penetration feed-
thru on ships and submarines, connectors for aircraft
engines and many more.
This catalog provides a sample of the standard
hermetic connectors available from Cannon. If you
don’t immediately find the connector that is right for
your application, we encourage you to call an ITT
Cannon technical sales representative in your area or
complete and mail the business reply card at the back
of this catalog.
Lightweight Sealed Circular
KJAYAS . . . . . . . . . . . . . Page J- 28 to J-29
J
Hermetic Connectors
Standard Circular
GS . . . . . . . . . . . . . . . . . Page J-30 to J-38
Thru-Bulkhead Circular
BFH / TBFH . . . . . . . . . . Page J-39 to J-42
Microminiature D
MDMH . . . . . . . . . . . . . Page J-43 to J-44
D Subminiature D
D*H. . . . . . . . . . . . . . . . Page J-45 to J-48
Dimensions shown in inches (mm)
Specifications and dimensions subject to change
www.ittcannon.com
J-3
MIL-C-38999 Series I, II, III Miniature Circular
KJLY / KJY / KJAY
• High contact density
• 100% scoop proof – Series I and III
• Lightweight Low Profile – Series II
• Environment-resistant
• Operating temperature range from -85°F to
+392°F (-65°C to +200°C)
ITT Cannon’s KJLY, KJY and KJAY connectors are
hermetically sealed and designed to meet the
critical performance and design requirements of
MIL-C-38999. Engineered for high density
circuitry capabilities, these connectors are
designed to operate at temperatures ranging
from -85°F to +392°F (-65°C to +200°C).
They are readily adaptable to both commercial
and space age requirements where size, weight,
scoop proof/low-profile design and high reliabil-
ity are key factors.
The KJLY and KJAY are designed with a “scoop-
proof” feature which provides a safety factor in
blind mating applications. The shells also feature
five keyway shell polarization to assure alignment
during engagement. Complete environment seal-
ing is accomplished with an interfacial seal, with
individual raised tapered sealing barriers around
each pin contact, a peripheral seal, and hermetic
sealing.
ITT Cannon’s MIL-C-38999 KJLY, KJY and KJAY
connector series offers these advanced features
to meet the demands of present-day
sophisticated engineering designs.
Standard Data
MATERIALS AND FINISHES
Shell
Insulator
Contacts
Seals
Jam Nut
MATERIALS AND FINISHES
Contact Size
22D, 20, 16, and 12
Contact Rating and Wire Size Accommodation
Wire
Contact Size and Test amps
Size
22D
*22M
*22
20
28
26
24
22
20
18
1.5
2.0
3.0
5.0
—
—
1.5
2.0
3.0
—
—
—
—
—
—
—
2.0
3.0
5.0
—
—
—
—
—
—
—
3.0
5.0
7.5
—
—
—
—
As noted in “How to Order” sections
Compression Glass
Nickel / Iron Alloy, Gold Plate
Silicone base elastomer
As noted in “How to Order” sections
J
16
—
—
—
—
7.5
10.0
13.0
—
—
12
—
—
—
—
—
—
—
7.0
23.0
Hermetic Connectors
16
—
14
—
12
—
*Inactive for new design
Service Rating (unmated condition)
Test
Service
Voltages
Rating M
Sea Level
110,000 ft.
MECHANICAL
Shell Styles
KJLY / KJAY
2 – Box mounting receptacle
1 – Solder mount receptacle
7 – Jam nut receptacle
1300
200
Service
Rating I
1800
200
Service
Rating II
2300
200
KJY
0 – Wall mounting receptacle
1 – Solder mount receptacle
7 – Jam nut receptacle
8, 10, 12, 14, 16, 18, 20, 22, 24
3 point bayonet, quick release
5 keyways
Low-profile
Shell Sizes
Coupling
Shell polarization
Design
9, 11, 13, 15, 17, 19, 21, 23, 25
3 point bayonet, quick release/triple start Acme
5 keyways
Scoop-proof
Dimensions shown in inches (mm)
Specifications and dimensions subject to change
www.ittcannon.com
J-13
MIL-C-38999 Series I, II, III Miniature Circular
KJLY / KJY / KJAY
Test Data
TEST
DESCRIPTION
Thermal Shock
Air Leakage
PARAGRAPH
REFERENCE
4.7.3
4.7.5
REQUIREMENTS
Unmated receptacles shall be subjected to 10 cycles of thermal shock per Step 1 and Step 2 of MIL-C-38999.
The connector shall be mounted in a suitable test apparatus. A pressure differential of 1 atmosphere shall be applied across the connector. A suit-
able means to determine the leakage through the connector of air or other pressurizing gas, containing not less than 10 percent helium by volume,
shall be employed while the specified pressure is applied. There shall be no evidence of leakage in excess of 0.01 micron ft
3
/h ( x 10
-7
cm
3
/s).
For qualification testing, mating halves shall be coupled and uncoupled; the forces or torques which must be applied to facilitate full coupling and
uncoupling shall be measured and recorded. For quality conformance, suitable gages may be used instead of the appropriate counterparts. The cou-
pling torque for mating and unmating of counterpart connectors shall meet the requirements of Table III, paragraph 4.7.6 MIL-C-38999.
Insulation Resistance at ambient temperature —
Unmated connectors shall be tested as specified in method 3003 of MIL-STD-1344. Connectors
shall be mated when testing after altitude immersion and humidity. The insulation resistance between any pair of contacts and between any con-
tact and the shell shall be greater than 5,000 megohms. Insulation resistance after altitude immersion shall be 10,000 megohms minimum. Insula-
tion resistance after humidity shall be 100 megohms minimum.
Insulation Resistance at elevated temperature —
Unmated connectors shall be tested as specified in method 3003 of MIL-STD-1344. Applicable
elevated temperature for 30 minutes:
Finish D, 150° +5/ -0°C; E; 200° +5/ -0°C.
Measurements shall be made while the connectors are still in the chamber at the specified temperature. The insulation resistance between any
pair of contacts and between any contact and the shell shall be greater than 200 megohms.
Dielectric withstanding voltage at sea level —
Wired, unmated connectors shall be tested in accordance with Method 3001 of MIL-STD-1344.
Connectors shall be mated when testing after altitude immersion and humidity. The magnitude of the test voltage shall be as specified in Table XIV.
The test voltage shall be maintained at the specified value for 2 seconds minimum.
TABLE XIV — TEST VOLTAGES, ac RMS, 60 Hz
Service Rating M
Service Rating I
Service Rating II
Altitude
Mated
Unmated
Mated
Unmated
Mated
Unmated
Sea Level
1300
1300
1800
1800
2300
2300
50,000 feet
800
550
1000
600
1000
800
70,000 feet
800
350
1000
400
1000
500
100,000 feet
800
200
1000
200
1000
200
Dielectric withstanding voltage at altitude —
Mated connectors and unmated connector halves with pin contacts shall be tested in accordance
with method 3001 of MIL-STD-1344. The magnitude of the test voltage shall be as specified in Table XIV. The test voltage shall be maintained at
the specified value for 2 seconds minimum. Only the engaging faces of hermetics shall be subject to the high altitude. The rear face shall be suitably
protected. The chamber shall be evacuated to each of the specified altitude pressure equivalents listed below.
Altitude
Equivalent Pressure
50,000 feet
87.5 torr
70,000 feet
35.5 torr
100,000 feet
5.74 torr
When tested as specified in 4.7.10.1 or 4.7.10.2 connectors shall show no evidence of flashover or breakdown.
Contacts of mated connectors shall be tested in accordance with method 3004 of MIL-STD-1344. Contacts in the mated condition shall meet the
contact resistance requirements of Table IV, paragraph 4.7.13 MIL-C-38999. Lead resistance may be included in the measurement.
TABLE IV — CONTACT RESISTANCE
Millivolt
Maximum Resistance
drop maximum
in milliohms
After
After
corrosion
corrosion
Wire
Test
or temp
or temp
Size
Amperes
Initial
durability
Initial
durability
12
16
20
22
17
10
5
3
85
85
60
85
100
100
75
95
5
8
12
28
6
10
15
32
Coupling Torque
4.7.6
Insulation Resistance
4.7.9.2
4.7.9.2
Dielectric
Withstanding
voltage
4.7.6
J
Hermetic Connectors
4.7.10.2
Contact Resistance
4.7.13
Class
Y
&
N
Vibration
4.7.22
Contact
Size
12
16
20
220
Shock
4.7.23
For qualification only, wired and mated connectors shall be subjected to the applicable test(s) specified. Connectors shall be mounted on the vibra-
tion table by normal means. All contacts shall be wired in a series circuit with 100 milliamperes maximum current flow through the series circuit dur-
ing vibration. Connectors shall be continuously monitored for all discontinuities. A detector capable of detecting any discontinuities in excess of
1 microsecond shall be used.
Wired and mated connectors shall be subjected to the applicable test specified. Connectors shall be mounted by normal means and held together
by normal coupling means. All contacts shall be wired in a series circuit with 100 milliamperes maximum current flow through the series circuit dur-
ing shock. Connectors shall be monitored for any discontinuities. A detector capable of detecting any discontinuities in excess of 1 microsecond shall
be used.
Dimensions shown in inches (mm)
Specifications and dimensions subject to change
J-14
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