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Quick Details

  • Place of Origin: China
  • Brand Name: LERDN
  • Model Number: LDY-10D
  • Certification: ISO9001/14001/CE/ROHS
  • Function: Low Voltage Power Supply Protection
  • Class to IEC 61643-1: Class III
  • Class to EN 61643-11: Type 3
  • Class to VDE 0675: D

Packaging & Delivery

Packaging Details Standard export packing

20kA voltage surge protector 4P Class D protection 


Application range

LDY-10D series are applied to equipotential bonding of the main low voltage distribution boxes in the building, providing overvoltage protection arising from the class D lightning strike to power supply system or misoperation. (Option from standard IEC61643- 1 and GB50343)


Main Feature:

  1. Plug-in type 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





Part No.





Voltage protection level Up 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

Housing material

Enhanced flame retardant PBT (UL 94V-0)

Max. backup fuse/air-break switch

50A Gl / 20A


≥ 10 mm2 stranded/flexible conductor

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China (Mainland) | Manufacturer, Trading Company
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