Dehn

What Dehn does

DEHN (DEHN SE) is a German family-owned industrial manufacturer founded in 1910 and headquartered in Neumarkt, Germany, specializing in lightning protection, surge protection, and safety equipment for electrical installations. The product portfolio is organized around the Red/Line family (surge protection for power supply systems up to 1,000 V AC / 1,500 V DC) and the Yellow/Line family (surge protection for IT and data communication systems), supplemented by lightning protection/earthing components, arc-fault safety equipment, and a growing monitoring/accessories range including DEHNrecord SD (IEC 61000-4-30 Class A power quality measurement) and DEHNdetect (wind turbine impulse current monitoring). Underlying technologies center on spark-gap-based combined arresters, RADAX Flow follow current limitation (capable of extinguishing mains follow currents up to 100 kArms), and Advanced Circuit Interruption (ACI) switch/spark-gap technology enabling zero leakage current operation.

DEHN serves seven primary verticals: buildings (industrial, functional, hospitals, multi-family and single-family dwellings), energy (photovoltaic systems, wind turbines, power grids, biogas, hydrogen), e-mobility (wall boxes, AC/DC and high-power charging stations, bus charging), process industries (oil and gas, chemical and pharmaceutical), railways/transportation, and mobile communications/cell sites. Hardware certification is extensive, including ATEX, IECEx, UL, Inmetro, KEMA, VDE, DEKRA, EBA, and UL 467 approvals, which gate entry into hazardous-area and railway segments.

The business model is predominantly B2B hardware sales distributed through a direct e-commerce platform (dehn.co.uk/en-GB/store) and regional offices such as DEHN (U.K.) LTD. in Leeds. Pricing is not publicly disclosed and requires login/registration. Go-to-market combines digital channels (website, LinkedIn, Twitter, YouTube, newsletter via Mailingwork GmbH), major trade fairs (The smarter E Europe 2026), and professional services (DEHNconcept planning, DEHNacademy, DEHNseminars, DEHNrisk, maintenance tests). Ownership remains family-controlled under Chairman Dr Philipp Dehn, with no disclosed external institutional investors or public listing.

Name

Dehn

Legal name

DEHN SE

Website

https://dehn.co.uk

Company type

Private

Founded year

1910

Operating status

Operating

Headcount range

11–50 employees

Short description

DEHN (DEHN SE) is a German family-owned manufacturer founded in 1910, producing lightning protection, surge protection, and safety equipment for electrical installations across buildings, energy (including renewables and hydrogen), e-mobility, process industries, railways, and telecommunications, sold globally via direct e-commerce and regional offices.

Ownership category

akta.pro rank

Headquarters

HQ city

Holmfirth

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Surge protection products: Sale of lightning current and surge arresters including DEHNventil, DEHNvenCI, DEHNshield, DEHNcombo, DEHNguard, DEHNcord product families for power supply systems, IT systems, and industrial applications
2. Lightning protection products: Sale of lightning protection equipment including air-termination systems, down conductors, earthing components, equipotential bonding bars, and foundation earth electrode components
3. Safety equipment: Arc fault protection products and devices for safety in electrical installations
4. Professional services: DEHNconcept planning support service, DEHNacademy training seminars, DEHNseminars professional education, maintenance tests, and customised product solutions
5. Measurement and monitoring equipment: DEHNrecord SD power quality measurement devices, DEHNdetect monitoring systems, lightning strike counters, and DCC discharge process recording devices

Go-to-market motion1 record

Distribution channels2 records

Marketing channels8 records

Core offering

DEHN manufactures and sells lightning protection, surge protection, and electrical safety equipment for low-voltage and industrial installations. Its portfolio covers lightning current and surge arresters (Type 1, Type 2, Type 3), lightning protection/earthing components, arc-fault protection devices, and power quality and lightning monitoring instruments, organised around the Red/Line (power supply) and Yellow/Line (IT/data) product families. Customers are industrial, energy, e-mobility, railway, telecom, oil and gas, and chemical/pharmaceutical operators that need standards-compliant protection concepts.

Product overview

DEHN is a manufacturer of lightning protection, surge protection, and safety equipment founded in 1910. The product portfolio is organized around the Red/Line family (power supply surge protection) and Yellow/Line family (IT systems protection). Key product lines include DEHNventil (modular combined lightning current and surge arresters), DEHNvenCI (single-pole combined arresters with integrated backup fuse), DEHNguard (Type 2 surge arresters), DEHNcord (compact surge protective devices for terminal equipment), DEHNshield and DEHNcombo (combined arresters for specific applications), and DEHNcharge (for battery storage systems). The company also offers IT systems protection products including DEHNpatch for Ethernet applications, lightning protection earthing components, safety equipment with arc fault protection, and various accessories like DEHNrecord SD (power quality measurement), DEHNdetect (wind turbine monitoring), lightning strike counters, and equipotential bonding components. Services include DEHNconcept planning support and DEHNseminars training.

Differentiator

Problem solved

Functional benefit

Brands

• Red/Line: Surge protection product segment offering solutions for protecting systems up to 1,000 V AC / 1,500 V DC against overvoltages.
• Yellow/Line

Products and services

• Red/Line — Surge protection for power supply systems

Segments7 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators2 records

Recent moves5 records

Expansion highlights6 records

Direct peers

• Phoenix Contact: Global specialist in industrial connectivity and surge protection (TRABTECH / TERMITRAB product lines) competing head-to-head with DEHN in SPDs for control cabinets, process automation and renewable energy applications.
• OBO Bettermann: German family-owned manufacturer of cable management, lightning protection and surge protection systems — the closest like-for-like competitor to DEHN in European earthing, equipotential bonding and SPD markets.
• nVent Electric (ERICO): nVent's ERICO brand is a globally dominant player in lightning protection, earthing and surge protection for rail, telecom, energy and industrial applications — direct competition across DEHN's core product set.
• Weidmüller: German industrial connectivity specialist with a dedicated surge protection (VARITECTOR) family overlapping with DEHN's Red/Line power and Yellow/Line IT product lines for cabinet builders and process-industry customers.
• Hager: European specialist in residential and commercial electrical installations with a focused surge arrester range competing directly with DEHN in the buildings and small-commercial segment.

Broad incumbents

• ABB: Global electrification incumbent whose OVR surge protection range competes with DEHN, particularly in switchgear-integrated protection and large utility/industrial projects, though SPD is one product among thousands.
• Siemens: Broad industrial conglomerate offering surge protection within its SIRIUS, SENTRON and low-voltage portfolios, competing primarily via integrated switchgear-plus-protection packages rather than as a specialist.
• Schneider Electric: Global energy management and industrial automation leader with surge protection devices sold under the Acti9 and Harmony brands; broader portfolio but overlapping in building, energy and e-mobility verticals.
• Eaton: US-based power management company with a dedicated SPD product family and Bussmann surge products, competing with DEHN in industrial, data centre and renewable energy applications.

Emerging players

• Saltek: Czech specialist surge protection manufacturer with strong overlap in PV, wind and EV charging applications; smaller scale than DEHN but a credible challenger in renewable-energy verticals.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/DEHN_uk
• YouTubeyoutube.com/@DEHNuk
• LinkedInlinkedin.com/company/dehnuk

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Dehn