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  • Series
  • Model
  • Brand / Made in
  • Surge protector for DC supplies 2-pole
  • Nominal DC voltage: 48Vdc
  • Max. operating voltage: 65 Vdc / 50 Vac
  • Type 1/2 application
  • Max. discharge current by pole 30 kA
  • Impulse current by pole 3kA
  • prIEC 61643-41 compliance


Type 1/2 48Vdc surge protector 2-pole

The DDC range is Type 1/2 pluggable surge protectors designed for equipment connected to DC powerlines. The technology based on high energy varistor equipped with thermal disconnection mechanism offers protection efficiency and and a maximal reliability.

DDC30 SPD range

  • DDC30-10-65 : 1-pole DC surge protector (+ or -), Un 48Vdc
  • DDC30-10-85 : 1-pole DC surge protector (+ or -), Un 75Vdc
  • DDC30-20-65 : 2-pole DC surge protector (+ and -), Un 48Vdc
  • DDC30S-20-65 : 2-pole DC surge protector (+ and -), Un 48Vdc with remote signaling of disconnection
  • DDC30-20-85 : 2-pole DC surge protector (+ and -), Un 75Vdc
  • DDC30S-20-85 : 2-pole DC surge protector (+ and -), Un 75Vdc with remote signaling of disconnection

DDC30-20 được lắp đặt trên đường dây nguồn một chiều để bảo vệ cho các thiết bị điện


  • SPD type: 1/2
  • Network: 48 Vdc
  • Nominal line voltage Un: 48 Vdc
  • Nominal DC voltage Un-dc: 48 Vdc
  • Max. DC operating voltage Uc-DC: 65 Vdc
  • Max. AC operating voltage Uc-AC: 50 Vac
  • Residual Current Ipe: < 0.1 mA
  • Follow current If: None
  • Nominal discharge current (15 x 8/20µs impulses) In: 15 kA
  • Max. discharge current (max. withstand @ 8/20µs by pole) Imax: 30 kA
  • Total Maximum discharge current (8/20µs) Imax Total: 60 kA
  • Impulse current by pole (max. withstand 10/350µs by pole) Iimp: 4 kA
  • Total lightning current (max. total withstand @ 10/350µs) Itotal: 8 kA
  • Connection mode(s): +/PE and -/PE
  • Protection mode(s): Common mode
  • Protection level +/PE (-/PE) Up: 300 V / 600 V
  • Admissible short-circuit current Isccr: 50 kA


  • Technology: MOV
  • SPD configuration: 2-poles
  • Connection to Network: Srew terminals: 2.5-25mm² +/-: 1.5-10mm²
  • Plugable: yes
  • 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 DC network
  • Disconnection indicator: 2 mechanical indicators - Red/Green
  • Spare module(s): MDDC30-65
  • Remote signaling of disconnection: Option DDC30S-20-65: Output on changeover contact


  • Standards compliance: prIEC 61643-41
  • Certification: EAC


  • Thermal disconnector: Internal
  • Back-up fuses: 50 A min. - 125 A max. - Fuses Type gG


DDC30-20-65 surge protectors are connected in parallel on the DC network and must be equipped with external fuses for short-circuit current protection

  • The total length of parallel connection wires to DC 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.
  • Local earthing resistance must be in compliance with the electrical rules.

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