Z21L181 Zenamic varistor 180V now Z21D181 180V
Varistor Voltage 180 (162-198) VlmA(v)
Max. Allowable Voltage 115 ACrms(v) 153DC(v)
Clamping Voltage (max) 300v at 100a
Rated Power (w) 1.0
Max Energy (j) 2ms 60.0
Peak current (A) 6500
Typical Capacitance (pf) 1200 1khz
Sold in packs of 5
Varistors have a high natural (non operating impedance) during normal standby use. A varistors impedance drops rapidly when subjected to a high voltage spike clamping the voltage to an acceptable level absorbing the unwanted energy thus protecting voltage sensitive components.
High energy absorption; excellent voltage clamping characteristics; fast response ; low idle power and high surge current capability.
Protection of all types of semi conductor; suppression of switching transients; voltage clipping and circuit damping; absorption of surge voltages associated with lightening strikes; prolongation of contact life and the protection of industrial switching circuits.