R125414000 Datasheet, PDF (5/51 Pages) List of Unclassifed Manufacturers – Sub-miniature coaxial connectors

INTRODUCTION
• SMA hermetic
Hermetic connectors are required to maintain a pressurised or vacuum environment inside a micro-electronic package.
Radiall offers 3 types of hermetic connectors:
1. Field replaceable hermetic receptacles with separate glass bead
(leakage rate below 10^-8 atm/cm³/sec)
The hermeticity level is guaranteed by the glass bead soldered into the package. A large choice of glass beads is
available from dia 0.3 to 0.5 mm. They are usually ordered separately from the receptacle. The receptacle can be removed
(field replaceable) from the package for maintenance without any risk of leakage. The field replaceable receptacle is
recommended when a high number of matings is required.
2. Hermetic receptacles with integrated glass bead
(leakage rate below 10^-8 atm/cm³/sec)
The glass bead is already in place inside the receptacle, hermeticity is guaranteed by a solder joint between the receptacle
and the package or with a metallic compression gasket.
Screw-on receptacle with metallic compression gasket offer superior climatic resistance: -65°C +200°C.
3. Hermetic receptacles without glass bead
(leakage rate below 10^-6 atm/cm³/sec)
A good hermeticity level is obtained with a metallic gasket at a cost advantage vs glass beads.
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