Manufacturer of lightning protection, surge protection, earthing and safety technology with engineering services
DEHN SE + Co KG
Neumarkt in der Oberpfalz, DE · Midrand (Johannesburg), ZANew on Amplifa
About DEHN
DEHN is a family-owned electrical engineering company headquartered in Neumarkt in der Oberpfalz, now run by the fourth generation since its founding in Nuremberg in 1910. The DEHNgroup develops and manufactures over 4,000 devices and components in the fields of external and internal lightning protection, surge protection, earthing and safety technology for people working on electrical installations, including arc-fault protective clothing and surge protective devices for AC and DC applications. Its proprietary technologies include ACI (Advanced Circuit Interruption) with an integrated switch-spark-gap combination, RAC switch choke technology, actiVsense and LifeCheck. The portfolio is complemented by DEHN Engineering Services: lightning risk analyses, lightning protection and surge protection planning including 3D planning, earthing design, soil resistivity measurements, 3D laser scanning and simulations. Customers come from the energy supply sector, photovoltaics, wind energy, mobile communications (cell sites), oil and gas, industrial automation, battery storage, e-mobility and building technology. With around 2,500 employees worldwide, more than 900 patents and 22 foreign subsidiaries, the DEHNgroup generates revenue of approx. €465 million (fiscal year 2024/2025) and supplies over 70 countries.
- Site
- Neumarkt in der Oberpfalz
- Processes
- Lightning Risk Assessment, Lightning Protection Design (external lightning protection incl. parts list and drawings), Surge Protection Specification (surge protection concept incl. parts list and drawings), Soil Resistivity Analysis and Report, 3D planning of lightning protection and earth-termination systems incl. drawings, mounting details,, Site inspection services, on-site acceptance of lightning protection, final project meeting, 3D laser scanning, Soil resistivity testing / measurement
- Materials
- Aluminium (Enclosure DEHNpatch outdoor), Copper (lightning-current-conducting conductor of HVI Conductor), Leather / Neoprene (DEHNcare leather protective clothing), ACI technology (Advanced Circuit Interruption), RAC spark gap technology (Rapid Arc Control), HVI conductor, actiVsense, LifeCheck
- Founded
- 1910
- Employees
- approx. 2,500
- Industries
- Energy supply/Critical infrastructure, Photovoltaics, Wind energy, Mobile communications/Telecommunications, Oil and gas industry, Industrial automation
- 01
Engineering & planning (risk analysis, 3D planning)
- 02
Development & design
- 03
Manufacturing (surge protective devices, lightning protection, earthing
- 04
Testing & quality assurance
- 05
Sales via subsidiaries and partners worldwide
- 06
On-site services, training (DEHNacademy)
Technologies & Materials
ACI technology (Advanced Circuit Interruption)
Integrated switch/spark-gap combination in surge arresters makes an external upstream fuse superfluous.
RAC spark gap technology (Rapid Arc Control)
Quickly limits follow currents, thereby relieving arresters and upstream fuses.
HVI conductor
High-voltage-resistant, insulated lightning current conductor with copper core for installation without separation distance up to 200 kA lightning current.
actiVsense
Automatic detection of the signal voltage for universally applicable combination arresters in information technology.
LifeCheck
Permanent condition monitoring of arresters detects electrical and thermal stress on the protective components.
DCD (Direct Current Disconnection)
Reliable disconnection in DC applications prevents fires caused by DC switching arcs, e.g. in DEHNguard SE DC.
Aluminium
Housing material of the waterproof IP66 surge protective device DEHNpatch outdoor.
Copper
Lightning-current-carrying conductor material of the HVI Conductor and standard material for connection cross-sections.
Locations
Neumarkt in der Oberpfalz
DEHeadquarters and main plant, development, manufacturing, R&D and quality assurance
- Materials
- Aluminium, Copper
- Highly automated manufacturing ("high volume, high automation")
Midrand, Johannesburg
ZASales and technology location DEHN Africa with engineering services
- 3D laser scanning
- Soil resistivity measurement
- CAD/3D planning
Components & Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Lightning Risk AssessmentEngineering | – | – | – | – | – |
| Lightning Protection Design (external lightning protection incl. parts list and drawings)Engineering | – | – | – | – | – |
| Surge Protection Specification (surge protection concept incl. parts list and drawings)Engineering | – | – | – | – | – |
| Soil Resistivity Analysis and ReportTesting | – | – | – | – | – |
| 3D planning of lightning protection and earth-termination systems incl. drawings, mounting details,Engineering | – | – | – | – | – |
| Site inspection services, on-site acceptance of lightning protection, final project meetingTesting | – | – | – | – | – |
| 3D laser scanningTesting | – | – | – | – | – |
| Soil resistivity testing / measurementTesting | – | – | – | – | – |
| Corrosion effect testingTesting | – | – | – | – | – |
| Lightning risk assessment for wind turbinesEngineering | – | – | – | – | – |
| 3D modellingEngineering | – | – | – | – | – |
| Safety earthing grid designEngineering | – | – | – | – | – |
| Checking the protected volumeTesting | – | – | – | – | – |
| Advanced lightning protection simulationEngineering | – | – | – | – | – |
| AC interference study and simulationEngineering | – | – | – | – | – |
| DEHNarX - arc fault protection (protection concept)Engineering | – | – | – | – | – |
| Calculation of Earth-Termination Systems for Transformer Stations (S03375)Engineering | – | – | – | – | – |
| Creation of CAD Drawings of Structures as Basis for Lightning Protection Design (S04555)Engineering | – | – | – | – | – |
| Design of a Surge Protection Concept (S05596)Engineering | – | – | – | – | – |
| Manufacture of surge protective devices (SPDs), lightning protection, earthing and safety equipmentAssembly | – | – | – | – | Aluminium |
Additional services
Reference customers
History
- 1910
Founded by master electrician Hans Dehn as an electrical installation business in Nuremberg (21 January 1910); today a fourth-generation family company
- 2024/2025
Revenue approx. €465 million, around 2,500 employees worldwide, 22 foreign subsidiaries