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Quick Details

  • Place of Origin: Shanghai, China (Mainland)
  • Brand Name: LERDN
  • Model Number: LDY-75B
  • Certification: ISO9001/14001/CE/ROHS
  • Class to IEC 61643-1: Class I
  • Class to EN 61643-11: Type 1
  • Class to VDE 0675: B
  • Function: Lightning Protection for Low Voltage

Packaging & Delivery

Packaging Details Standard Export Packing By Air With TNT Express
Delivery Time Lead Time Within 3-5 Days After Receiving 100% Payment By T/T


In 75KA Surge Arrester
1. LDY-75B/275V
2. Uc: 275 V, Up: < 2.3kV,
3. In: 75kA, Imax: 120kA,
4. Leakage Current: < 20mA

In 75KA  Surge Arrester


Application range

LDY-75B series are applied to equipotential bonding of the main low voltage distribution boxes in the building, providing overvoltage protection arising from the class 1 lightning strike to power supply system or misoperation. (Option from standard IEC61643- 1 and GB50343)


Main Feature:

  1. Build-in temperature control circuit breaker, high security performance;
  2. Light-off in notice window indicates normal, red indicates broken, which are clear and easy distinguished;
  3. Optional telesignalling monitoring interface, realizable remote monitoring;
  4. Function of lightning protection backup, the protection ability is available without red light on;
  5. Realizable Kevin wiring, to reduce conductor resistance;
  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 nylon

(light gray, flame retardancy degree: V0)

Max. backup fuse/air-break switch

160A gL


≥ 16 mm2 stranded/flexible conductor


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China (Mainland) | Manufacturer, Trading Company
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