Eternaloc®
Contact us
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 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.

Related products

Hermetic Sensor Packaging
Hermetic Sensor Packaging
SCHOTT’s sensor packaging enables reliable protection and functionality of sensor electronics, especially in harsh-environment, performance-critical applications. SCHOTT offers a broad portfolio of sensor housings using advanced hermetic sealing technologies to guard even the most sensitive electronics.

Wafer

hydrogen
Explore
HEATAN®
HEATAN®
HEATAN® high-temperature sensor feedthroughs deliver unparalleled protection and performance for sensors in extreme temperatures of 1000°C and above. Made using a unique combination of materials and state-of-the-art sealing technology, they enable next-generation sensor designs.
Explore
Sealing and Solder Glass
Sealing and Solder Glass
SCHOTT glass has the capability to produce the perfect hermetic seal. Our offerings include sealing glass for extreme-heat environments and solder glass for lower-temperature applications. These highly reliable sealants have an exceptional track record in many sectors, including electronics and nuclear industries.
Explore
Microelectronic Packaging
Microelectronic Packaging
Often referred to as hybrid packages, multi-chip module housings, or IC packages, SCHOTT’s hermetic microelectronic packages and multilayer ceramic substrates protect sensitive electrical assemblies and components in ultra-tough operating conditions. They simultaneously enable reliable power and signal transmission.
Explore
Connectors and Feedthroughs for Security and Defense
Connectors and Feedthroughs for Security and Defense
Security and defense applications demand impeccable safety and reliability for all components. SCHOTT mil-type hermetic connectors and feedthroughs for defense deliver dependable, long-term performance to reliably protect electronics in safety-critical applications while enabling electrical and data signal passthrough.
Explore
Solidur®
Solidur®
Our ultra-robust High Brightness Solidur® LEDs deliver unparalleled reliability in conditions previously unsupported by conventional LEDs. This includes safety-critical medical, dental, UVB/UVC, and other harsh-environment applications in which conventional LEDs and other light sources are unable to survive.
Explore

Exterior view of the office of Hangzhou New-Asia Cryogenic Industrial Equipment
News & Innovation stories

How NAC is growing alongside China’s LNG industry

Hangzhou New-Asia Cryogenic Industrial Equipment Co. Ltd. (NAC) is committed to the research and development of cryogenic pumps, driving China’s cryogenic industry to connect with world standards. Chief Engineer Zhang Yiming shares the challenges and opportunities in the LNG and clean energy industry.

Read more
Hydrogen applications

Hydrogen study by Roland Berger features SCHOTT sealing technology

A recent hydrogen-related manufacturing 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
The SUISO Frontier hydrogen carrier ship. Image credit: HySTRA

World’s First Liquefied Hydrogen Carrier Ship Features Glass-Sealed Eternaloc® Feedthroughs from SCHOTT

The world’s first hydrogen carrier ship – the SUISO Frontier – features numerous glass-sealed feedthrough components to provide increased safety. SCHOTT worked with Kawasaki Heavy Industries, Ltd. to develop tailor-made double-glass-sealed, vacuum-tight feedthroughs that allow transmission of both electrical and optical signals for the ship’s monitoring systems.

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.

Contact us
Ulrich Dirr, Head of Sales Eternaloc®
Ulrich Dirr

Head of Sales Eternaloc®