• Series
  • Model
  • Brand / Made in
  • Type 1 + 2 unipolar surge protector
  • Iimp total: 100 kA on 10/350µs impulse
  • Imax : 140 kA on 8/20µs impulse
  • Internal disconnections, status indicators
  • Remote signaling
  • IEC 61643-11, EN 61643-11 and UL1449 ed.5 compliance
The DS250E is an extreme duty Type 1+2 designed to protect the entrance of the electrical installation. They are used to protect biphase, 3-phase or 3-phase + neutral networks in common mode or in common and differential mode. The 'Multi-Varistor' technology used allows the best possible behavior for the LV network (no follow-on current). The DS250E 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
  • Network: 230/400 V 3-phase+N
  • AC system: IT
  • Nominal line voltage Un: 230 Vac
  • Max. AC operating voltage Uc: 440 Vac
  • Max. load current(if series connection) IL: 100 A
  • Temporary Over Voltage (TOV) Charasteristics - 5 sec (Without disconnection) UT: 580 Vac withstand
  • Temporary Over Voltage (TOV) Charasteristics - 120 mn (Without disconnection or with safety disconnection) UT: 770 Vac disconnection
  • Residual Current Leakage current to Ground Ipe: < 8 mA
  • Operating current Continious current at Uc Ic: 2 mA
  • Follow current If: None
  • Nominal discharge current (15 x 8/20 µs impulses) In: 50 kA
  • Max. discharge current (max. withstand @ 8/20 µs by pole) Imax: 140 kA
  • Impulse current by pole (max. withstand 10/350µs by pole) Iimp: 25 kA
  • Total lightning current(max. total withstand @ 10/350µs) Itotal: 100 kA
  • Admissible short-circuit current Isccr: 50 000 A
  • Connection mode(s): L/PE and N/PE
  • Protection mode(s): Common mode
  • Protection level L/PE @ In (8/20µs) Up L/PE: 2.5 kV
  • Protection level N/PE @ In (8/20µs) Up N/PE: 2.5 kV
  • Specific energy by pole max. withstand 10/350 µs W/R: 156 kJ/ohm
  • Internal short circuit protection: No
  • Internal Thermal protection: Yes
Mechanical Characteristics
  • Technology: MOV
  • SPD configuration: 3-phase+Neutral
  • Connection to Network: By screw terminals: 6-35mm² / by bus
  • Format: 1-pole modular box assembled
  • Mounting: Symmetrical rail 35 mm (EN 60715)
  • Housing material: Thermoplastic UL94 V-0
  • Operating temperature: -40/+85°C
  • Protection rating: IP20
  • Failsafe mode: Disconnection from AC network
  • Disconnection indicator: 3 mechanical indicator by pole
  • Remote signaling of disconnection: Output on changeover contact
  • Dimensions: See diagram
  • 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: EAC


DS254E-400 Type 1+2 AC surge protector - 3-phase+N are 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).



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