LIGHTNING & SURGE PROTECTION

Demesne are stockists of the Dehn Range of Lightning, Surge Protection, Lightning Protection Products. Browse the full range below
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DEHN

DEHNguard Type 2 and 3 Surge Arresters with integrated backup fuse

  • Integrated backup fuse Eliminates the need for an external fuse, reducing components and wiring.
  • Space-saving design Ideal for compact LV distribution boards and control panels.
  • Type 2 & Type 3 surge protection Protects against switching surges and transient overvoltages.
Product has 2 variants.
In stock
Buy Buy
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DEHN

DEHNventil Type 1,2 & 3 Combined Lightning Current and Surge Arresters

  • Combined Type 1, 2 & 3 protection Complete lightning and surge protection in a single coordinated device.
  • Very high lightning current discharge capacity Designed for installations exposed to direct lightning strikes.
  • Outstanding follow current limitation Prevents nuisance tripping and maintains system availability.
  • Suitable for high prospective short-circuit currents Ideal for service entrances and demanding network conditions.
Product has 4 variants.
In stock
Buy Buy
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DEHN

DEHNshield Type 1,2 and 3 Combined Lightning Current and Surge Arresters

  • All-in-one Type 1, 2 & 3 protection
  • High lightning current discharge capability Suitable for installations exposed to direct lightning currents.
  • Maximum system availability Advanced follow current limitation minimises nuisance tripping and downtime.
  • Energy coordination built in Designed to work seamlessly with other DEHN surge protection devices.
Product has 5 variants.
In stock
Buy Buy
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DEHN

DEHNguard Type 2 and 3 Surge Arresters

  • Type 2 & Type 3 surge protection Ideal for protection against induced surges and switching overvoltages.
  • Low protection levels Reduces stress on downstream equipment and extends service life.
  • Fast response characteristics Effective protection for sensitive electronic and control systems.
Product has 5 variants.
In stock
Buy Buy
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DEHN

DEHNrail Type 3 Surge Arresters

  • High discharge capacity due to heavy-duty zinc oxide varistor / spark gap combination
  • DEHNrail 2-Pole and 4-pole Modular devices.
  • Operating state / fault indication by green / red indicator flag in the inspection window
  • Dedicated Type 3 protection Final-stage surge protection for sensitive terminal equipment.
  • Compact DIN rail mounting Ideal for control panels, cabinets, and distribution boards.
Product has 5 variants.
Not in stock
Buy Buy
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DEHN

DEHNrapid Type 1 Surge Arresters for Telecommunications

  • Type 1 surge protection for telecom lines Designed to handle direct lightning currents on communication systems.
  • High lightning current discharge capacity Suitable for exposed installations and outdoor line entry points. Protection of critical communication infrastructure
  • Fast response characteristics Effective protection for sensitive data and signal circuits.
  • Energy-coordinated protection Works alongside downstream Type 2 and Type 3 telecom arresters.
Product has 5 variants.
Not in stock
Buy Buy
DEHN 920271 BLITZDUCTOR XT combined lightning
DEHN

BLITZDUCTOR XT – Protection Modules

  • Protection for signal and data lines Designed specifically for measurement, control, and communication circuits.
  • Low protection levels Safeguards sensitive electronics while maintaining signal quality. Modular, space-saving design
  • Fast response times Effective against fast transient overvoltages.
  • High system availability Reduces the risk of downtime and equipment failure.
Product has 7 variants.
In stock
Buy Buy
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DEHN

DEHNpatch – Arrester for Data Networks and Ethernet Applications

  • Protection for Ethernet and data networks Designed specifically for LAN and structured cabling systems.
  • Supports high-speed data transmission Maintains signal integrity for modern Ethernet applications.
  • Suitable for PoE systems Protects devices powered over Ethernet without affecting performance.
  • Compact, inline design Easy installation within patch panels and network cabinets.
Product has 3 variants.
Not in stock
Buy Buy
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DEHN

DEHN Type 2 and 3 AC Surge Arresters

  • Type 2 and 3 combined Devices
  • 1-phase and 3-phase options
  • Fault monitoring versions
Product has 3 variants.
In stock
Buy Buy
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DEHN

DEHN Lightning & Surge Protection for IT Systems

  • Protection devices for Analogue signals
  • Data Network in line protection
  • RFID Life Check options
Product has 4 variants.
Not in stock
Buy Buy
Dehn 961205 Kombiableiter Typ 1 DEHNvenCI
DEHN

DEHNventil Type 1,2 and 3 Combined Lightning Current and Surge Arresters with integrated backup fuse

  • Integrated backup fuse
  • High lightning current capacity Handles up to 25 kA (10/350 µs), suitable for high-exposure installations.
  • Low protection level Up ≤ 1.5 kV, including the backup fuse, helping protect downstream terminal equipment.
Product has 1 variant.
Not in stock
Buy Buy

Energy Storage Systems (ESS):
Blog

Electrical Protection in Energy Storage Systems (ESS): Keys to a Safe Installation

The PMX fuse holder range is compact, halogen-free, and manufactured in Europe for fast availability. Available in 10×38, 14×51, and 22×58 sizes with IEC, UL, and CSA approvals, they feature silver-plated contacts, IP20 touch-safe design, and optional blown fuse indicators — giving panel builders reliable, safe, and flexible protection.

wayne moody
Company News

Wayne Moody Joins OEM | Demesne Electrical

We’re excited to share some great news at Demesne Electrical. Wayne Moody has joined our team, bringing with him years of experience and a clear vision for the future. His focus will be on building on our strong reputation here in Ireland and driving our growth across Europe.

DF electrci 485121
Blog

PMX Fuse Holder Range – Compact, Reliable, Built for Demanding Panels

The PMX fuse holder range is compact, halogen-free, and manufactured in Europe for fast availability. Available in 10×38, 14×51, and 22×58 sizes with IEC, UL, and CSA approvals, they feature silver-plated contacts, IP20 touch-safe design, and optional blown fuse indicators — giving panel builders reliable, safe, and flexible protection.

stego loop
Blog

Stego Enclosure Heaters with Loop

STEGO’s new loop enclosure heaters are a smart fix for condensation in control cabinets. They heat evenly, install fast with no tools, and come in a range of sizes from 10 to 150 W. They're tough, touch-safe, and even have a built-in thermostat option—everything you need to protect your gear and keep things running smoothly.

draw wire
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Precision in Motion: Kübler Linear Measurement Systems at Demesne Electrical

Precise, Durable Linear Measurement from Kübler
Browse our range of Kübler draw wire encoders and linear measurement systems, designed for accurate position and speed sensing in industrial and OEM applications. Built for tough environments. Trusted by automation professionals.

hora
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New on the Market: RKA Aluminium Terminal Blocks for Copper and Aluminium Conductors

Designed by HORA eTec, the RKA series offers a complete lineup of aluminium terminal blocks built for both aluminium and copper conductors. Every model in the range includes push-through protection, is finger-safe, and is built with installation efficiency in mind. From compact control panels to large-scale systems, here’s the full breakdown—from the RKA 16 to the RKA 300.

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