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What technology is used in SE Surge Protection Devices and what are the differences in the MOV vs. SAD technology ?

Issue:
SPD Product Design
 
Product Line:
Surge Protection Devices
 
Environment:
EMA,EBA,HWA,SDSA
 
Cause:
Pros/Cons
 
Resolution:
Schneider Electric uses MOVs (metal oxide varistors) suppression technology. SAD (silicon avalanche diode) have a faster response time (e.g. 5 picosecond compared to 1 nanosecond for MOVs). The faster response time results in improved SPD performance but the cost is far more expensive.
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