
HERMETIC FEEDTHROUGH FOR SPACE OR INDUSTRIAL
VACUUM APPLICATIONS
Positronic Industries
www.connectpositronic.com
1
ELECTRICAL CHARACTERISTICS AT SEA LEVEL
SIGNAL CONTACTS
Contact current rating:
Initial Contact Resistance:
0,008 ohms maximum
Proof Voltage:
POWER CONTACTS
Contact Current Rating:
Initial Contact Resistance:
0.005 ohms maximum.
Proof Voltage:
7,5 A nominal, size 20
5
A nominal, size 22
1000 V r.m.s.
10, 15, 20, 30 and 40 amperes nominal
1000 V r.m.s.
CONTACT RETENTION
in insert:
Shells:
9 lbs. (40 N).
Male shells may be dimpled
for EMI/ESD ground paths.
Trapezoidally shaped shells.
Polarization:
Mechanical Operations:
500 operations, minimum,
per IEC 512-5.
CLIMATIC CHARACTERISTICS:
Temperature Range:
-40 to +125°C. The temperature range can
be expended under certain conditions.
Consult factory.
Helium Leak Rate < 5-10
-9
mbar.l/s under a vacuum of 1.5x10
-2
mbar
Outgassing :
Total Mass Loss –
TML < 1 %
Collected Volatile Condensable Materials –
CVCM < 0,1 %
All XAVAC Series connectors are 100 % leak tested after
fabrication.
In addition to the standard options, Positronic can supply XAVAC
connectors as board mount varieties or with flying leads.
XAVAC series connectors utilize precision machined contacts for
strength and durability. The female contact features a rugged
"Closed Entry" design having a brass or stainless steel shroud. The
materials and finishes, as well as the technical characteristics of the
XAVAC series connectors conform to MIL-DTL-24308, Goddard
and the SPACE-D32 specifications.
MATERIALS AND FINISHES:
Insulator:
Glass-filled DAP per ASTM-D-5948 or
polyester
glass-filled
MIL-M-24519,
UL94V0,
NASA-RP-1124.
Precision machined high tensile copper
alloy with brass or stainless steel shroud.
0,000050 inch (1,25 microns) gold over
copper plate.
Brass with 0,000050 inch (1,25 microns)
gold over copper plate or stainless steel.
Aluminium alloy, golden brown conversion
coating.
Viton (fluoro carbone). Other material per
request.
per
ASTM
E-595,
Contacts:
Contact plating:
Shells:
Housing:
O-ring:
MECHANICAL CHARACTERISTICS :
Fixed Contacts:
Size 8 Contact: 0,142 inch (3,61mm) diameter.
Female contact: Features large surface area
(L.S.A.) closed entry design utilizing BeCu
mechanical retention member.
Size 20 Contact: 0,040 inch (1,02mm) diameter.
Female Contact: Closed entry design with brass
or stainless steel shroud.
Size 22 Contact: 0,030 inch (0,76mm) diameter.
Female Contact: Closed entry design with brass
or stainless steel shroud.
XAVAC Series Connectors are D-Subminiature feedthroughs
for SPACE or INDUSTRIAL vacuum applications.
Both sides contain four threaded mounting holes, an o-ring
groove and fixed female jackscrews. These redundant features
allow either side of the connector to be mounted towards the
vacuum, giving the customer the ultimate in flexibility.
The type of contacts is according to the customer request : with
normal density insulators 9, 15, 25, 37, and 50 contacts
(AWG20): Male/Female, Male/Male, or Female/Female. With
high density insulators: 15, 26, 44, 62, 78 and 104 contacts
(AWG22): Male/Female. With mixed contact combinations
(Power, Coaxial, and Signal contacts): Male/Female.
SHIELDED CONTACTS
Initial Contact Resistance:
0.008 ohms maximum
Nominal Impedance:
Insertion Loss:
VSWR:
Above values measured using frequency domain techniques.
HIGH VOLTAGE CONTACTS
Flash over Voltage:
3600 V r.m.s.
Proof Voltage:
2700 V r.m.s.
Initial Contact Resistance:
0.008 ohms maximum.
CONNECTOR
Insulator Resistance:
5 G ohms.
Clearance and
Creepage Distance:
0.039 inch (1.0mm) minimum.
Working Voltage:
300 V r.m.s.
Residual Magnetism for
Space Flight Versions:
20 Gamma maximum.
50 ohms.
-0.46 dB at 1 GHz
-1.5 dB at 2 GHz
1.15 average at 1 GHz
1.56 average at 2 GHz
X
AVAC