Surge protection for IT systems
Get to know the Yellow/Line!
Reliable protection for modern technology: our surge arresters secure information and telecommunications technology as well as building, process, control and safety systems. Whether it's a data centre, logistics centre, industrial plant or railway infrastructure – our solutions reliably protect your hardware from surge damage and ensure uninterrupted data flow.



Yellow/Line – because information technology failures are not an option
The Yellow/Line is the answer to the challenges of applications with high security requirements. Its robust design ensures reliable protection of sensitive information technology and prevents failures and data loss. With our decades of expertise, innovative pioneering spirit and reliable quality, we offer a future-proof product range that is always one step ahead of the challenges.
Selection guides
The fast and easy way to get the right products. Possible with our selection guides.

Perfect interaction of our product series
BLITZDUCTORconnect and DEHNpatch offer reliable protection against lightning and surge voltages. In combination with the DEHNrecord IRCM remote signalling unit, permanent status monitoring of the two arrester families is possible. The arresters in the individual product series protect the measuring and control circuits, Ethernet infrastructure and bus and telecommunications interfaces against damage caused by lightning and surge events.
PCB solutions
Compact, powerful and easy-to-integrate micro surge protective devices for modern industrial applications. Soldered directly onto the PCB, easy to integrate.
Discontinued products
Missing an item from the surge protection product range for information technology[SG1] ? Here you will find the products that we have not continued and that have not been replaced by successor products. If there is a successor, you can easily find the product by searching.
LifeCheck with handheld testers
For all protective devices with the LifeCheck symbol, you have the option of monitoring the function of the arrester. With the practical handheld tester, you can quickly detect whether your protective components are damaged by electrical or thermal loads. This means that you are always reliably informed and can replace overloaded protection modules in time.