DC power surge protector

DDC50S-21Y-1200
Part Number: 828511563
DDC50S-21Y-1200
  • DC power Type 2 SPD
  • For Energy Storage/EV Charging
  • In/Imax: 20/50 kA
  • Pluggable modules
  • Remote signaling
  • prIEC 61643-41 compliance

The DDC50S-21Y range is type 2 pluggable surge protectors designed for protection to Energy System Storage (ESS). Its technology based on high energy varistor equipped with thermal disconnection mechanism offers protection efficiency and and a maximal reliability. These DC power surge protectors are available with a Max. DC operating voltage from 500 to 1500 Vdc. To ensure maximum protection of the ESS installation, CITEL has developed a kit (article code: 1156339601) of products consisting of a DDC50S-21Y surge protector and a specific fuse (100,000 A tested and approved) compatible with: short-circuits of storage systems and CITEL surge protectors.


SPD type 2
Nominal DC voltage Un-dc 1000 Vdc
Max. DC operating voltage Uc 1200 Vdc
Residual Current Ipe < 0.1 mA
Nominal discharge current In 20 kA
Max. discharge current Imax 50 kA
Impulse current by pole Iimp 4 kA
Protection level +/- Up 3.6 kV
Protection level +/PE (-/PE) Up 3.6 kV
Admissible short-circuit current Isccr 100 000 A
Network type DC
Connection to Network By screw terminals: 2.5-25mm²
Plugable Yes
Mounting Symmetrical rail 35 mm (EN 60715)
Housing material Thermoplastic UL94 V-0
Operating temperature Tu -40/+85°C
Protection rating IP20
Failsafe mode Disconnection from DC network
Disconnection indicator 1 mechanical indicator by pole - Red/Green
Spare module(s) MDDC50-1200
Remote signaling of disconnection output on changeover contact
Wiring for remote signaling 1.5 mm² max.
Max. Voltage/Current for remote signaling 250 V / 0.5 A (AC) / 30 V / 3 A (DC)
Dimensions See diagram - 3 TE (EN43880)
Standards compliance prIEC 61443-41 - IEC61643-11
Thermal disconnector Internal
Fuses 50 A min. (Isccr 100 kA) - 125 A max. (Isccr 50 kA) - gBat Fuses