The RA-V7 Series utilizes micro-gap discharge technology, thus demonstrating extremely fast response characteristics in dark ambient conditions without the use of radioactive isotopes.
Applied as indirect lightning surge protection in the power line of equipment, this model is used with a series connected MOV between line and ground in the power line.
It may also be used within electronic circuits to protect from destructive impulse current while still permitting `Voltage Withstand Testing" without having to remove the RA-V7.