Z21D431 Metal Oxide Zenamic Varistor was Z21D431
Manufactured by ATC Semitec
Sold in packs of 5
Varistor Voltage 430V
Max. Allowable Voltage 275AC; 350DC
Max. Clamping Voltage at 100A is 710V
Rated Wattage 1.0w
Energy 2ms 140J
Withstanding surge current 6500A 1 time; 400A 2 time
Typical Capacitance (1kHz) 900pf
Joyin – JVR20N431K
Harris – V275LA40A/B
Panasonic – C20DK431
Thomson – 24M02750K
Iskra – CV275K20
Siemens – 20K275
Power Developments – Z250G
Samhwa – 431D-20A
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.