Eternaloc®
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Five versions of SCHOTT Eternaloc® feedthroughs for energy applications shown on a grey background

Eternaloc®

Eternaloc® feedthroughs enable the transmission of electrical power and signals into and out of vacuum-tight assemblies. They provide long-term peace of mind for energy applications in challenging environments, including liquefied natural gas, compressed gas, nuclear power, submarines, and oil and gas equipment.
Man working on a SCHOTT Eternaloc® feedthrough

Safe and proven technology for energy applications

Eternaloc® feedthroughs and connectors protect safety-critical electrical infrastructure. This is especially important in potential severe accident scenarios that can include extreme temperature, pressure, thermal cycling, and shocks / vibration. SCHOTT’s unique compression glass-to-metal sealing has a proven track record and is seen as the safest technology available.

Female scientist examining an Eternaloc® feedthrough

Maintenance-free reliability reduces cost of ownership

Our electrical feedthroughs have delivered maintenance-free performance for decades, enabling reduced recalls and replacements, as well as lower total cost of ownership. This means both safer and more cost-efficient generation and transportation of energy.

Cutaway view of a SCHOTT Eternaloc® Liquefied Gas Terminal Header

Product variants

Nearly every Eternaloc® feedthrough, connector, and cable penetration is completely custom-made. What unifies the product family is the careful design of each component to reliably meet the challenging specifications of end-use applications.

More about variants
SCHOTT Eternaloc® electrical penetration assembly for nuclear high temperature reactors
SCHOTT Eternaloc® lead-through plate for hydrogen gas-cooled generators
SCHOTT Eternaloc® feedthrough for oil and gas exploration
Nuclear-powered submarine on sea surface

Superior robustness and performance for challenging energy applications

Eternaloc® feedthroughs represent a proven worldwide standard for the transmission of electrical power and data in a variety of safety-critical, harsh-environment applications. The components simultaneously act as gas diffusion-proof isolation elements.

Explore product properties in detail
Made for extreme temperatures
Made for extreme temperatures
Can be designed for operating conditions from -200 to +450°C, while special material combinations can withstand up to 1000°C.
Superior pressure resistance
Superior pressure resistance
Eternaloc® feedthroughs can be designed to withstand as high as 1300 bar or 20,000 PSI pressure.
Certified explosion-proof
Certified explosion-proof
Can be manufactured and certified to explosion-proof standards, such as ATEX and IECEx, as well as other domestic regulations.
Superior longevity
Superior longevity
Maintenance-free reliability with up to 60-year qualified lifetime, helping to contribute to lower total cost of ownership.
Fully customizable
Fully customizable
Complete design flexibility, including choice of metals, sealing glasses, dimensions, coax, connectors, insulating materials, etc.
Excellent electrical performance
Excellent electrical performance
Can be designed for 13,800 volts and 1,500 amperes, as well as for instrumentation purposes
Watch how Eternaloc® feedthroughs improve reliability and safety in energy applications.

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  • Watch how Eternaloc® feedthroughs improve reliability and safety in energy applications.
  • Watch how nuclear power plants are becoming safer and more cost ef­ficient thanks to innovative components

We are certified

Eternaloc® feedthroughs are manufactured at a production site that is certified according to ISO 9001 / 14001, KTA 1401, ASME, ATEX & IECEx, and CE plus, amongst others.

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News & Innovation stories

Hydrogen study by Roland Berger features SCHOTT sealing technology

A recent study by international consulting firm Roland Berger points out that hydrogen technologies need to develop so that they work on an industrial scale using mature technologies. SCHOTT's hermetic feedthroughs and glass seals are proven components and materials that can improve the safety along the entire hydrogen value chain. To learn more, please look at the deep dive on page 19 of the study.

Learn more

Want to know more? Let's talk

Whether you need more information, samples, a quote, or advice for a project, I would be delighted to talk to you.

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Ulrich Dirr, Head of Sales Eternaloc®
Ulrich Dirr

Head of Sales Eternaloc®