Circular, D-Sub, RF Coax, Thermocouple & High-Voltage Hermetic Feedthroughs
PAVE-Seal® manufactures hermetic electrical feedthroughs and hermetically sealed connectors used as sealed bulkhead electrical connectors for vacuum, pressure, and harsh-environment applications. Our product line includes hermetic circular connectors, D-Sub connectors, RF coax feedthroughs, Ethernet LAN feedthroughs, thermocouple feedthroughs, and high-voltage hermetic seals, providing leak-tight electrical transmission across environmental boundaries while maintaining signal integrity and electrical isolation.
All hermetic feedthroughs are available in standard and custom configurations, engineered for vacuum systems, pressure vessels, and extreme environments, with U.S.-based manufacturing and engineering support.
- Custom pin counts & voltages
- RF, thermocouple & Ethernet options
- Custom Vacuum feedthrough designs for OEM & harsh environments
- U.S. manufacturing & engineering support
Resources and Downloads
Below are standard bulkhead electrical connectors and vacuum feedthrough drawings, organized by conductor count, mounting style, and physical configuration.
- Up to 2 total wires – Technical datasheets (PDF)
- 3 – 5 total wires – Technical datasheets (PDF)
- 6 – 13 total wires – Technical datasheets (PDF)
- 14 – 900 total wires – Technical datasheets (PDF)
Hermetic Circular & Bulkhead Electrical Connectors
High Voltage & RF Hermetic Feedthroughs
Hermetic & Bi-Directional Sealing
- PAVE-Seal® systems maintain hermetic integrity for vacuum and pressure from either direction.
- Suitable for environments where pressure differentials exceed normal atmospheric conditions.
Wide Operating Temperature Range
- Engineered to operate across extended temperature ranges (customizable by design and materials).
Leak-Tight Performance
- All seals pass stringent helium leak testing at rates as low as 10-9 cc/sec, depending on configuration. This ensures minimal gas leakage in critical systems.
- Material & Environmental Resistance
- Designed for chemical resistance (solvents, fuels, oils, gases) and low outgassing performance for high-vacuum applications.
Custom & Standard Solutions
- Available in standard designs for fast deployment or custom configurations engineered to match your exact electrical, pressure, or vacuum requirements.
Typical Applications
Hermetic electrical feedthroughs are used where both electrical connectivity and environmental isolation are required, including:
- Vacuum chambers and UHV systems
- Aerospace & defense systems
- Industrial process equipment
- Semiconductor fabrication tools
- High-pressure vessels
These feedthroughs ensure electrical signals and power pass through sealed barriers without compromising vacuum or pressure environments.
Product Specifications
Leak Performance: Helium leak rates to ~10-9 cc/sec (varies by design)
Operating Temp Range: Customizable (e.g., −200°C to +200°C)
Conductors Supported: Single wires, multi-wire bundles, cable assemblies, coaxial cables
Environmental Resistances: Low outgassing, chemical resistance
Design & Customization Options
- Standard hermetic feedthroughs with documented performance
- Custom engineered feedthroughs tailored to:
- Specific cable or wire types (including coaxial, thermocouple, fiber optic, multi-pin configurations)
- High pressure or vacuum specifications
- Unique mechanical or electrical requirements
Why choose PAVE-Seal® Bulkhead electrical connectors?
Industry-Trusted Performance
- Proven hermeticity and durability across varied environments.
- Suitable for critical systems where air or gas leakage is unacceptable.
- Engineering Support Included
Our team provides responsive design support and application guidance from concept through production.
Hermetic Electrical Feedthroughs Specifications
- Dielectric Strength: >17.4 kV/mm
- Dielectric Constant: 5.3@ 1 Mhz
- Volume Resistivity: @ 125° C1x1015 Ohm-cm
- Dissipation Factor: 0.03 @ 1 Mhz
- Hardness, Shore D: 96
- Toxicity Rating K (NASA MAPTIS)
- Odor Rating A
- Thermal Vacuum Stability Rating A
- Flammability Rating X
- FM Class 3600, EExd II 90° C TI
HERMETIC EPOXY TEMPERATURE RATING (Epoxy is proprietary and not sold separately)
-200C may be possible when designed for use with a Teflon o-ring
Any type or size of wire or cable may be specified including coaxial cables, thermocouple wire pairs, high voltage wires, fiber optic cable, flat cables, etc. for length.
NO DETECTABLE LEAKAGE THRU CONDUCTOR OR INSULATION.
PAVE-Seal Epoxy Comparative Tracking Index
The CTI value is used for electrical safety assessment of electrical apparatus, as for instance carried out by Underwriters Laboratory. The minimum required creepage distances over an insulating material between electrically conducting parts in apparatus, especially between parts with a high voltage and parts that can be touched by human users, is dependent on the insulators CTI value. Also for internal distances in an apparatus by maintaining CTI based distances, the risk of fire is reduced. Performance Level Categories (PLC) were introduced to avoid excessive implied precision and bias. — CTI Test Results