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  • Series
  • Model
  • Brand / Made in
  • Type 1+2+3 unipolar surge protector
  • 25 kA on 10/350µs impulse
  • Low voltage Up
  • Internal disconnection, status indicator and remote signaling
  • Optimized to TOV
  • IEC 61643-11 and UL1449 ed.5 compliance
The products of the range DS250VG is an extreme duty Type 1+2+3 AC surge protector device designed to protect at the entrance of the electrical installation. This SPD is particularly useful in a high lightning density area where the risk of heavy surge current or even direct strike is high (eg: buildings equipped with lightning rods). The `Spark gap + Varistor` technology allows a very low level of protection and an absence of following current. The DS250VG is mounted on a DIN Rail and has a double connection for the active conductor, which allows an optimized connection to the network.

Electrical Characteristics

  • SPD type: 1+2+3
  • Network: 230/400 V 
  • Nominal line voltage Un: 230Vac
  • Max. AC operating voltage Uc: 255 Vac
  • Max. load current IL: 100 A
  • Temporary Over Voltage (TOV) Charasteristics - 5 sec (Without disconnection) UT: 335 Vac withstand
  • Temporary Over Voltage (TOV) Charasteristics - 120 mn (Without disconnection or with safety disconnection) UT: 770 Vac withstand
  • Residual Current Ipe: None
  • Follow current If: None
  • Nominal discharge current (15 x 8/20 µs impulses) In: 30 kA
  • Max. discharge current (max. withstand @ 8/20 µs by pole) Imax: 70 kA
  • Impulse current by pole (max. withstand 10/350µs by pole) Iimp: 25 kA
  • Withstand on Combinaison waveform IEC 61643-11 Class III test: 1.2/50µs - 8/20µs Uoc: 20 kV
  • Withstand on overvoltages IEEE C62.41.1: 20 kV
  • Admissible short-circuit current Isccr: 50000 A
  • Connection mode(s): L/N or L/PE
  • Protection mode(s): Common or Differential mode
  • Protection level @ In (8/20µs) and @ 6 kV (1,2/50 µs) Up: 1.5 kV
  • Residual voltage @ In (8/20 µs) Up-in: 1.1 kV
  • Residuel voltage at 5 kA @ 5 kA (8/20µs) Up-5kA: 0.6 kV 
  • Specific energy by pole max. withstand 10/350 µs W/R: 156 kJ/ohm

Mechanical Characteristics

  • Technology: VG Technology (MOV+GSG)
  • SPD configuration: 1-pole
  • Connection to Network: By screw : 6-35 mm² (50mm² flexible)
  • Format: 1-pole modular box 
  • Mounting: Symmetrical rail 35 mm (EN60715)
  • Housing material: Thermoplastic UL94-V0
  • Operating temperature: -40/+85°C
  • Protection rating: IP20
  • Failsafe behavior: Disconnection
  • Disconnection indicator: 1 mechanical indicator
  • Remote signaling of disconnection: Output on changeover contact


  • Thermal disconnector: Internal
  • Installation ground fault breaker: Type S or delayed
  • Fuses: Fuses Type gG - 315 A


  • Standards compliance: IEC 61643-11 / EN 61643-11 / UL1449
  • Certification: UL / CSA / EAC


DS250VG-300 Type 1+2+3 AC surge protector - 1 pole is connected in parallel on the AC network and must be equipped with external fuses for short-circuit current protection

  • The total length of parallel connection wires to AC network must be lower than 0.5 m in order not to increase the protection level (Up) provided by the SPD.
  • Wiring is made by screw connections. On some models, a distribution bus can be used.
  • The protection wire coming from the SPD must be connected to the bonding bar of the electrical panel. Paralleling the protection wire with phases conductors must be avoided.
  • The cross sectional wire must be 6 mm² minimum for Type 2 SPD and 16 mm² for Type 1.
  • Local earthing resistance must be in compliance with the electrical rules.

Further information can be found in IEC 61643-12 standard (selection and application principles for low voltage SPD).

  • Combine two DS250VG-300 to get DS252VG-300 used for AC single phase network
  • Combine three DS250VG-300 to get DS253VG-300 used for AC 3-phase network TNC/IT
  • Combine four DS250VG-300 to get DS254VG-300 used for AC 3-phase + N network TNS
  • Combine three DS250VG-300 + DS100EG-600 to get DS254VG-300/G used for AC 3-phase + N network TT/TNS


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