Although the Zinc Oxide Surge Arrester (MOA) performs well in most scenarios, it is not an "all-in-one solution". The following scenarios may not be suitable for using zinc oxide lightning arresters due to technical limitations or cost-effectiveness issues:

1、High frequency, high-power pulse environment

High frequency switching power supply system

Problem: Zinc oxide valve plates have limited energy absorption capacity at high frequencies (MHz level) and may be damaged due to heating.

Alternative solution: Use gas discharge tubes (GDT) or a combination of varistors and TVS diodes.

Laser and radar systems

Problem: It needs to withstand nanosecond level ultra-high peak current (such as 100kA/μ s), and the response speed of zinc oxide lightning arrester is insufficient.

Alternative solution: Use graphite gap lightning arresters or semiconductor overvoltage protection devices.

2、Poor temperature environment

Extremely cold regions (below -50 ℃)

Problem: The resistivity of the zinc oxide valve plate increases at low temperatures, the leakage current decreases, the protection threshold drifts, and it may fail.

Alternative solution: Use silicon carbide lightning arrester or oil immersed lightning arrester.

High temperature industrial environment (>150 ℃)

Problem: High temperature accelerates valve plate aging, increases leakage current, and shortens lifespan.

Alternative solution: Use ceramic gap lightning arrester or high-temperature resistant MOA (but expensive).

3、Highly polluted and highly corrosive environment

Chemical plants, acid rain areas

Problem: Strong acid and alkali environments can corrode zinc oxide valve plates, leading to performance degradation.

Alternative solution: Use a silicone rubber jacket MOA or a fully enclosed metal oxide lightning arrester.

Desert and Gobi regions

Problem: Sand and dust can easily enter the interior of the lightning arrester, causing short circuits in the discharge gap or contamination of the valve plate.

Alternative solution: Use dust-proof MOA or gap lightning arrester.

4、High cost sensitive scenarios

Rural power grid and temporary electricity supply

Problem: The cost of zinc oxide lightning arresters is relatively high and may exceed the budget.

Alternative solution: Use silicon carbide lightning arrester or gap lightning arrester.

Small power devices (such as household appliances)

Problem: The equipment value is low, and the cost proportion of lightning arresters is too high.

Alternative solution: Use varistors or TVS diodes.