Features :
• Used as voltage-dependent resistors (VDR's) to protect electronic devices
• They protect against overload build-up and protect valuable equipment from power surge damage
• Surge voltages are absorbed in the varistor
Selection Criteria :
• The maximum operating voltage must be lower than the varistor voltage
• The capacity of the varistor (energy absorption) should match the energy content of the varistor
Technical Specifications :
• Material : Zinc Oxide (ZnO)
• Storage Temperature : -40...+125°C
• Operating Temperature, Max. : +85°C
• Working Surface Temperature, Max. : +115°C
• Response Time, Max. : 25ns
• Voltage/Temperature Coefficient : -0,05%/°C
• Insulation Resistance 500V : >1000MΩ
• URMS [V AC] : 275
• URMS [V DC] : 350
• UV [V] : 430
• ΔUV [%] : ±10
• US [V] : 710
URMS = Max. Operating Voltage ,
UV = Varistor Voltage at 1 mA,
DUV = Tolerance of Varistor Voltage,
US = Clamping Voltage
• IMax. 1 Impulse [A] : 1200
• IMax. 2 Impulse [A] : 600
• PRated [W] : 0,25
• E [J] : 33,0
• T [mm] : 5,5
IMax.= Max. Surge Current (8 x 20µs),
PRated = Rated Power,
E = Energy Absorption, 2 ms,
T = Disc Thickness
Dimensions :
• DMax. [mm] : 16,5
• Ø d [mm] : 0,8±0,05
• F [mm] : 7,5±1
• HMax. [mm] : 22,0
• H1Max. [mm] : 5,0
• LMin. [mm] : 24,0
• TMax. [mm] : s. o.
