CITEL – DS220-24DC Type 2 24Vdc surge protector 2-pole

DS220-24DC surge protectors are designed to protect equipment connected to DC (and AC) power supplies from lightning surges. It is based on varistors matched to the network voltage: the varistors have thermal disconnection devices to control any end-of-life. These DIN rail SPD are connected in parallel to the equipment being protected.



  • SPD type: 2
  • Network: DC or PV network 24Vdc
  • Nominal DC voltage Un-dc: 24 Vdc
  • Nominal PV voltage Uocstc: 24 Vdc
  • Max. AC operating voltage Uc: 30 Vac
  • Max. PV operating voltage Ucpv: 38 Vdc
  • Max. DC operating voltage Uc: 38 Vdc
  • Max. load current IL: 20 A
  • Residual Current Ipe: < 0.1 mA
  • Operating current Ic: < 0.1 mA
  • PV Permanent Operating current Icpv: < 0.1 mA
  • Follow current If: None
  • Nominal discharge current In: 10 kA
  • Max. discharge current Imax: 20 kA
  • Total Maximum discharge current Imax Total: 40 kA
  • Current withstand short circuit PV Iscpv: 1000 A
  • Connection mode(s): +/-/PE
  • Protection mode(s): Common mode
  • Protection level +/PE (-/PE) Up: 250 V


  • Technology: MOV
  • SPD configuration: 2-poles
  • Connection to Network: By screw terminals: 1.5-10mm² (actives wires) and 2.5-25mm² (ground)
  • Format: Plug-in modular box
  • Mounting: Symmetrical rail 35 mm (EN 60715)
  • Housing material: Thermoplastic UL94 V-0
  • Operating temperature: -40/+85°C
  • Protection rating: IP20
  • Outdoor application: No
  • Failsafe mode: Disconnection from DC network
  • Disconnection indicator: 2 mechanical indicators
  • Spare module(s): DSM220-24DC
  • Remote signaling of disconnection: Option DS220S-24DC: output on changeover contact
  • Dimensions: See diagram


  • Standards compliance: IEC 61643-11 / EN 61643-11 / UL1449 ed.5


  • Thermal disconnector: Internal
  • Fuses: Fuses type gG – 20A

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