Coordinated Type 1 Lightning Current Arrester

For protecting low-voltage consumer's installations against surges and even direct lightning strikes. For installation in conformity with the lightning protection zone concept at the boundaries from 0A– 1.
  • Coordinated spark-gap-based lightning current arrester
  • Extremely high lightning current discharge capacity up to 200 kA (10/350 µs)
  • Low voltage protection level UP ≤ 2.5 kV
  • Extremely robust design for installation on busbars or mounting plates


DSO 1 255: Coordinated single-pole lightning current arrester with an extremely high lightning current discharge capacity


The spark gap of the coordinated DEHNsolid lightning current arrester has an extremely high lightning current discharge capacity of 200 kA (10/350 µs), making DEHNsolid the most powerful lightning current arrester currently available on the market. Consequently, a technical solution is now available for applications where such powerful surge protective devices are required. The device ensures lightning protection if the lightning current is not distributed and thus the full lightning current may flow through the surge protective device. If a lightning protection level higher than LPL I according to EN 62305 is to be expected, DEHNsolid offers adequate protection.

DEHNsolid features a robust design due to its extreme installation conditions and can be installed in two different ways. On the one hand, the arrester can be directly mounted on the busbar. This ensures a mechanically stable installation, which is required in case of such extreme lightning currents due to the high forces, and short low-impedance connections. On the other hand, the arrester can be screwed onto a mounting plate / fixing unit using the fixing lugs if it is not possible to install it on a busbar. Extremely short and robust connecting cables are required for this device to ensure mechanical strength of the entire arrangement and a minimum voltage drop on the connecting cables to achieve an optimal voltage protection level for the installation.


DEHNsolid 1 255

DEHNsolid 1 255

Basic circuit diagram DSO 1 255Dimension drawing DSO 1 255

Coordinated single-pole lightning current arrester for use in 230 / 400 V systems; for installation on busbars or mounting plates.


Part No.
Classification according to EN 61643-11 / IEC 61643-11
Max. continuous operating voltage (a.c.) (UC)
Lightning impulse current (10/350 µs) (Iimp)
Specific energy (W/R)
Voltage protection level (UP)
Directly coordinated with DEHNguard (cable length ≥ 35 cm)
Follow current extinguishing capability (a.c.) (Ifi)
Follow current limitation / Selectivity
Response time (tA)
Max. mains-side overcurrent protection
Short-circuit withstand capability
Temporary overvoltage (TOV) (UT) – Characteristic
Operating temperature range (TU)
Number of ports
For mounting on
Enclosure material
Place of installation
Part No.
  • DSO 1 255
  • 900 230
  • type 1 / class I
  • 255 V (50 / 60 Hz)
  • 200 kA
  • 10 MJ/ohms
  • ≤ 2.5 kV
  • DG S 440 (FM)
  • 3 kArms
  • No tripping of fuses up to 3 kA (prosp.)
  • ≤ 100 ns
  • 160 A gG
  • 3 kArms
  • 440 V / 120 min. – withstand
  • -40 °C ... +80 °C
  • 1
  • PE(N) busbars, min. 35 mm2
  • via cable lug, min. 35 mm2 / max. 50 mm2
  • thermoplastic, red, UL 94 V-2
  • indoor installation
  • 1,49 kg
  • 4013364153783
  • 1 pc(s)
  • 900 230
  • Specifications (PDF)
  • More
    • Further Pictures
      Basic circuit diagram DSO 1 255
      open PDF
      Dimension drawing DSO 1 255
      open PDF
      Further Information
      Product Specifications (Text)


      Coordinated DEHNsolid 1 255 lightning current arrester
      Coordinated single-pole lightning current arrester for 
      maximum requirements on the lightning current discharge capacity
      Type 1 SPD classification as per EN 61643-11
      Robust design without venting means for installation
      on busbars or mounting plates 
      Max. continuous operating voltage: 	255 V a.c.
      Voltage protection level: 		<= 2.5 kV
      Lightning impulse current (10/350): 	200 kA
      Follow current extinguishing capability: 	3 kArms
      Dimensions: 200 x 186 x 52 mm

      delivery and installation.

      Brand: DEHN
      Type: DSO 1 255
      Part No.: 900 230

      or equivalent.
      Installation Instructions
      CAD-Data for registered Users