DC power surge protector
DDC50-21Y-500
DDC50-21Y-500
Part Number: 828511253
  • DC power Type 2 SPD
  • For Energy Storage/EV Charging
  • In/Imax: 20/50 kA
  • Pluggable modules
  • Remote signaling (option)
  • prIEC 61643-41 compliance

The DDC50 range is type 2 pluggable surge protectors designed for protection to battery storage system. The technology based on high energy varistor equipped with thermal disconnection mechanism offers protection efficiency and and a maximal reliability.


SPD type 2
Nominal DC voltage Un-dc 450 Vdc
Max. DC operating voltage Uc 500 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 2.1 kV
Protection level +/PE (-/PE) Up 2.1 kV
Admissible short-circuit current Isccr 100 000 A
Connection to Network by screw terminals: 2.5-25 mm²
Mounting Symmetrical rail 35 mm (EN60715)
Housing material Thermoplastic UL94-V0
Operating temperature Tu -40/+85°C
Protection rating IP20
Failsafe mode Disconnection from network
Disconnection indicator 1 mechanical indicator by pole - Red/Green
Spare module(s) MDDC50-500
Remote signaling of disconnection option DDC50S-21Y-500: 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)
Weight 0.292 kg
Standards compliance prIEC 61443-41 - IEC61643-11
Thermal disconnector Internal
Fuses 50 A min. (Isccr 100 kA) - 125 A max. (Isccr 50 kA) - high voltage DC Fuses