Z7L220, Z7L270, Z7L330

Z7L330 is the product name of a metal oxide varistor.It has some features such as:(1)high energy absorption;(2)excellent voltage clamping characteristics;(3)symmetrical characteristics-for use on AC or DC;(4)fast response;(5)compact and robust construction;(6)low idle power;(7)high surge current capability;(8)specific types for pace/paks and solid state relays.Also it can be used in protection of all types of semiconductors,suppression of switching transients,voltage clipping and circuit damping and absorption of surge voltage associated with lighting strikes,prolongation of contact life,and the last one is protection in industrial switching circuirs.

The Z7L330 voltage suppressors are metal oxide varistors having a non-linear current voltage characteristics which exhibits an almost constant voltage over a wide range of current.They are ideally suited to all transient voltage protection applications and their high clamping ratios and low steady state power consumption offer considerable circuit advantages over more traditional methods of protection.

Normally the Z7L330 idles at a low current level at the nominal voltage when a transient over-voltage occurs in the circuit,the Z7L330 current increases rapidly,its voltage remaining virtually constant.The transient energy is thus absorbed by the Zenamic and the associated circuit impedances.