DEHNflex

Flexible Protection of Terminal Equipment

For protecting electronic equipment against surges. For installation in electrical installation systems, e.g. flush-mounted systems, cable ducts and flush-type boxes. German utility patent for DEHNflex A / ... D. For installation in conformity with the lightning protection zone concept at the boundaries from 1 – 2 and higher.
  • Two-pole surge arrester with monitoring device and disconnector
  • Enhanced safety due to fault-proof Y protective circuit
  • Acoustic fault indication
  • Compact design
  • For use in flush-mounted systems, cable ducts and flush-type boxes

Version

DEHNflex M: Compact design; for use in cable duct systems and flush-type boxes
DEHNflex A: For use in any cable duct systems or flush-type boxes; with test function
DEHNflex D: Like DEHNflex A, but for series connection of several socket outlets

Details

As the name suggests, the DEHNflex family offers almost unlimited application options. Being two-pole surge arresters, the compact modules are ideally suited for protecting electronic loads in final circuits. The design was adapted to the most common places of installation, that is cable ducts and flush-type boxes. DEHNflex devices show that small and compact dimensions do not necessarily mean that surge arresters are inefficient. The fault-proof Y protective circuit always ensures safety even if the phase and neutral conductors cannot be identified. Apart from the powerful Y circuit, the compact enclosure also houses a disconnector and an acoustic fault indicator. Be it in cable ducts, flush-mounted systems, branching boxes or device casings – DEHNflex is always installed in the right place close to terminal equipment.

Models

DEHNflex M

DEHNflex A

DEHNflex D

DEHNflex M

Basic circuit diagram DFL M
Dimension drawing DFL M

Surge arrester for single-phase 230 V TT and TN systems for use in all installation systems of terminal equipment; compact dimensions.

Specifications

Type
Part No.
SPD according to EN 61643-11 / IEC 61643-11
Nominal voltage (a.c.) (UN)
Max. continuous operating voltage (a.c.) (UC)
Nominal discharge current (8/20 µs) (In)
Total discharge current (8/20 µs) [L+N-PE] (Itotal)
Combination wave (UOC)
Combination wave [L+N-PE] (UOC total)
Voltage protection level [L-N] / [L/N-PE] (UP)
Response time [L-N] (tA)
Response time [L/N-PE] (tA)
Max. mains-side overcurrent protection
Short-circuit withstand capability for max. mains-side overcurrent protection (ISCCR)
Temporary overvoltage (TOV) [L-N] (UT) – Characteristic
Temporary overvoltage (TOV) [L-N] (UT) – Characteristic
Temporary overvoltage (TOV) [L/N-PE] (UT) – Characteristic
Temporary overvoltage (TOV) [L/N-PE] (UT) – Characteristic
Temporary overvoltage (TOV) [L+N-PE] (UT) – Characteristic
Fault indication
Number of ports
Operating temperature range (TU)
Terminal wires
Enclosure material
Place of installation
Degree of protection of installed device
Dimensions
Weight
GTIN
PU
Part No.
  • DFL M 255
  • 924 396
  • type 3 / class III
  • 230 V (50 / 60 Hz)
  • 255 V (50 / 60 Hz)
  • 1.5 kA
  • 3 kA
  • 3 kV
  • 6 kV
  • ≤ 1250 / ≤ 1500 V
  • ≤ 25 ns
  • ≤ 100 ns
  • B 16 A
  • 1 kArms
  • 335 V / 5 sec. – withstand
  • 440 V / 120 min. – safe failure
  • 335 V / 120 min. – withstand
  • 440 V / 5 sec. – withstand
  • 1200 V + UREF / 200 ms – safe failure
  • acoustic signal on
  • 1
  • -25 °C ... +40 °C
  • 1 mm2, 120 mm long
  • thermoplastic, red, UL 94 V-2
  • indoor installation
  • IP 20
  • 30 x 50 x 11 mm
  • 32 g
  • 4013364091016
  • 1 pc(s)
  • 924 396
  • Specifications (PDF)
  • More
    • Further Pictures
      Basic circuit diagram DFL M 255
      open PDF
      Dimension drawing DFL M 255
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      DEHNflex M 255 surge arrester
Two-pole surge arrester for all installation 
systems of 230 V terminal equipment
Compact dimensions
Type 3 SPD according to EN 61643-11
For use in flush-type boxes and cable ducts
Acoustic fault indication
Max. continuous operating voltage: 255 V a.c. 
Voltage protection level: <= 1.5 kV 
Total discharge current: 		3 kA
Max. mains-side overcurrent protection: 32 A gG or B/C 32 A
Energy-coordinated according to IEC 62305-4 with arresters 
of the Red/Line series

      delivery and installation.

      Brand: DEHN
      Type: DFL M 255
      Part No.: 924 396

      or equivalent.
      Installation Instructions
      Certificates
      CE_DFL_M_255
      CAD-Data for registered Users
      924396.stp
      924396.igs
      924396.jt
      924396.dwg
      924396m_D.dxf

DEHNflex A

Basic circuit diagram DFL A
Dimension drawing DFL A

Surge arrester for single-phase 230 V TT and TN systems for use in all installation systems of terminal equipment; with test function; compact dimensions.

Specifications

Type
Part No.
SPD according to EN 61643-11 / IEC 61643-11
Nominal voltage (a.c.) (UN)
Max. continuous operating voltage (a.c.) (UC)
Nominal discharge current (8/20 µs) (In)
Total discharge current (8/20 µs) [L+N-PE] (Itotal)
Combination wave (UOC)
Combination wave [L+N-PE] (UOC total)
Voltage protection level [L-N] / [L/N-PE] (UP)
Response time [L-N] (tA)
Response time [L/N-PE] (tA)
Max. mains-side overcurrent protection
Short-circuit withstand capability for max. mains-side overcurrent protection (ISCCR)
Temporary overvoltage (TOV) [L-N] (UT) – Characteristic
Temporary overvoltage (TOV) [L-N] (UT) – Characteristic
Temporary overvoltage (TOV) [L/N-PE] (UT) – Characteristic
Temporary overvoltage (TOV) [L/N-PE] (UT) – Characteristic
Temporary overvoltage (TOV) [L+N-PE] (UT) – Characteristic
Fault indication
Number of ports
Operating temperature range (TU)
Terminal wires
Enclosure material
Place of installation
Degree of protection of installed device
Dimensions
Weight
GTIN
PU
Part No.
  • DFL A 255
  • 924 389
  • type 3 / class III
  • 230 V (50 / 60 Hz)
  • 255 V (50 / 60 Hz)
  • 3 kA
  • 5 kA
  • 6 kV
  • 10 kV
  • ≤ 1250 / ≤ 1500 V
  • ≤ 25 ns
  • ≤ 100 ns
  • B 16 A
  • 1 kArms
  • 335 V / 5 sec. – withstand
  • 440 V / 120 min. – safe failure
  • 335 V / 120 min. – withstand
  • 440 V / 5 sec. – withstand
  • 1200 V + UREF / 200 ms – safe failure
  • acoustic signal on
  • 1
  • -25 °C ... +40 °C
  • 1 mm2, 120 mm long
  • thermoplastic, red, UL 94 V-2
  • indoor installation
  • IP 20
  • 36 x 46 x 19 mm
  • 36 g
  • 4013364073692
  • 1 pc(s)
  • 924 389
  • Specifications (PDF)
  • More
    • Further Pictures
      Basic circuit diagram DFL A 255
      open PDF
      Dimension drawing DFL A 255
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      DEHNflex A 255 surge arrester
Two-pole surge arrester for all installation 
systems of 230 V terminal equipment
Type 3 SPD according to EN 61643-11
For use in flush-type boxes and cable ducts
Compact dimensions
Acoustic fault indication
with test function
Max. continuous operating voltage: 255 V a.c. 
Voltage protection level: <= 1.5 kV 
Total discharge current: 5 kA
Max. mains-side overcurrent protection: 16 A gG or B 16 A
Energy-coordinated according to IEC 62305-4 with arresters 
of the Red/Line series

      delivery and installation.

      Brand: DEHN
      Type: DFL A 255
      Part No.: 924 389

      or equivalent.
      Installation Instructions
      Certificates
      CE_DFL_A_D_255
      CAD-Data for registered Users
      924389.stp
      924389.igs
      924389.jt
      924389.dwg
      924389m_D.dxf

DEHNflex D

Basic circuit diagram DFL D
Dimension drawing DFL D

Surge arrester for single-phase 230 V TT and TN systems for use in all installation systems of terminal equipment; allows series connection; with test function; compact dimensions.

Specifications

Type
Part No.
SPD according to EN 61643-11 / IEC 61643-11
Nominal voltage (a.c.) (UN)
Max. continuous operating voltage (a.c.) (UC)
Nominal load current (a.c.) (IL)
Nominal discharge current (8/20 µs) (In)
Total discharge current (8/20 µs) [L+N-PE] (Itotal)
Combination wave (UOC)
Combination wave [L+N-PE] (UOC total)
Voltage protection level [L-N] / [L/N-PE] (UP)
Response time [L-N] (tA)
Response time [L/N-PE] (tA)
Max. mains-side overcurrent protection
Short-circuit withstand capability for max. mains-side overcurrent protection (ISCCR)
Temporary overvoltage (TOV) [L-N] (UT) – Characteristic
Temporary overvoltage (TOV) [L-N] (UT) – Characteristic
Temporary overvoltage (TOV) [L/N-PE] (UT) – Characteristic
Temporary overvoltage (TOV) [L/N-PE] (UT) – Characteristic
Temporary overvoltage (TOV) [L+N-PE] (UT) – Characteristic
Fault indication
Number of ports
Operating temperature range (TU)
Terminal wires
Enclosure material
Place of installation
Degree of protection of installed device
Dimensions
Weight
GTIN
PU
Part No.
  • DFL D 255
  • 924 395
  • type 3 / class III
  • 230 V (50 / 60 Hz)
  • 255 V (50 / 60 Hz)
  • 16 A
  • 3 kA
  • 5 kA
  • 6 kV
  • 10 kV
  • ≤ 1250 / ≤ 1500 V
  • ≤ 25 ns
  • ≤ 100 ns
  • B 16 A
  • 1 kArms
  • 335 V / 5 sec. – withstand
  • 440 V / 120 min. – safe failure
  • 335 V / 120 min. – withstand
  • 440 V / 5 sec. – withstand
  • 1200 V + UREF / 200 ms – safe failure
  • acoustic signal on
  • 1
  • -25 °C ... +40 °C
  • 1 mm2, 130 / 200 mm long
  • thermoplastic, red, UL 94 V-2
  • indoor installation
  • IP 20
  • 36 x 46 x 19 mm
  • 67 g
  • 4013364076334
  • 1 pc(s)
  • 924 395
  • Specifications (PDF)
  • More
    • Further Pictures
      Basic circuit diagram DFL D 255
      open PDF
      Dimension drawing DFL D 255
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      DEHNflex D 255 surge arrester
Two-pole surge arrester for all installation 
systems of 230 V terminal equipment
For through-wiring 
Type 3 SPD according to EN 61643-11
For use in flush-type boxes and cable ducts
Compact dimensions
Acoustic fault indication
with test function
Max. continuous operating voltage: 255 V a.c. 
Voltage protection level: <= 1.5 kV 
Total discharge current: 5 kA
Max. mains-side overcurrent protection: 16 A gG or B 16 A
Energy-coordinated according to IEC 62305-4 with arresters 
of the Red/Line series

      delivery and installation.

      Brand: DEHN
      Type: DFL D 255
      Part No.: 924 395

      or equivalent.
      Installation Instructions
      Certificates
      CE_DFL_A_D_255
      CAD-Data for registered Users
      924395.stp
      924395.igs
      924395.jt
      924395.dwg
      924395m_D.dxf