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Quick Details

  • Place of Origin: Shanghai, China (Mainland)
  • Brand Name: LERDN
  • Model Number: LDY-20C/1P-275,LDY-20C/2P-275
  • Class to VDE 0675: C
  • Class to EN 61643-11: Type 2
  • Class to IEC 61643-1: Class II
  • Business Mode: OEM/Manufacturer/Export
  • Certification: ISO9001/14001/CE/ROHS
  • Function: Lightning Protection for Low Voltage
  • In(Norminal discharge current): In 5 kA 10kA 20kA 25kA 40kA 50kA 60kA 80kA 100kA 200kA
  • Warranty: Five-years warranty
  • CE: Certificate

Packaging & Delivery

Packaging Details: Standard Export Packing By Air With TNT Express

Surge Protective Device /SPD/Surge Protection Devices:

Application range:

LDY-20C surge protective device series are applied to equipotential bonding of the main low voltage distribution boxes in the building, providing overvoltage protection arising from the class C lightning strike to power supply system or misoperation. (Option from standard IEC61643- 1 and GB50343).


Main Feature:

  1. Plug and play design, live-wire replacement, easy maintenance;
  2. Build-in temperature control circuit breaker, high security performance;
  3. Green light in notice window indicates normal; red indicates broken, replacement notice, which is clear and easy distinguished;
  4. Optional telesignalling monitoring interface, realizable remote monitoring;
  5. External bus-bar wire, single module free assembled, easy project construction;
  6. Assembled 1P, 1P+N, 2P, 3P, 3P+N, 4P etc modes, applied to various electric network systems.


Main technical data:





Max. continuous operating voltage Uc V







Voltage protection level Up kV







Residual Voltage at 5kA(8/20) Ures kV







Nominal discharge current In (8/20μs) kA



Max. discharge current Imax (8/20μs) kA



Leakage current 75%Uc 1mA

≤ 20 μA


Response time tA

< 25 ns

< 100 ns

Protection modes

1P, 1P+N, 2P, 3P, 3P+N,4P


50Hz to 60Hz 

Housing material

Enhanced flame retardant PBT (UL 94V-0)

Max. backup fuse/air-break switch

80A gL/40A


≥ 16mm2 stranded/flexible conductor


We are manufacturer :


CE Certificate and ISO Certificate





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China (Mainland) | Manufacturer, Trading Company
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