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varistor

Brand Name: FENGHUA, KERUI
Technology: Ceramic Composition
Type: Varistor
Place of Origin: Guangdong China (Mainland)
Package Type: Throught Hole
Payment Terms: T/T,Western Union
Minimum Order Quantity: 1000 Piece/Pieces
Supply Ability: 10000000 Piece/Pieces per Day
Package: Bulk (with poly bag); Taping packing(Ammo or Reel)
Delivery Time: 7~10 working days.
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Supplier Details

Zhaoqing Kerui Electronic Co., Ltd.

[ Guangdong, China (Mainland) ]
Gold Supplier [ 1st Year] Verified Supplier
  • Business Type:Manufacturer, Agent
  • Product/Services:Radial Leaded MLCC,Axial Leaded Ceramic Capacitor,Chip Capacitor,Chip ...
  • Online Showroom: 115 products
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  • Product Details
  • Company Profile
  • Brand Name: FENGHUA, KERUI
  • Technology: Ceramic Composition
  • Type: Varistor
  • Place of Origin: Guangdong China (Mainland)
  • Package Type: Throught Hole

ZINC OXIDE VARISTOR:]
Widely voltage range 18v~1.8kv;
Excellent non-linearity voltage;
Symmetric V-I characteristics.

ZINC OXIDE VARISTOR
1) Are non-linner resistors utilize a semiconductor electronic ceramic element
   mainly composed of Zinc Oxide and its resistors change as a function of the 
   applied voltage. It's called varistor or Transient surge absorbers.
2) Features
Widely voltage 18v-1.8kv;
Fast response to the rapidly increase voltage(≤25ns);
Excellent non-linearity votage;
Symmetric V-I characteristics;
Great withstanding surge current(2000A/cm2);
No follow-on current;
Long life;
3)How to select a varistor(only reference)
A:Varistor voltage
  Varsto voltage should be more than the operating voltage in over protective
  circuit, the formula is shown as the follow.
  V1mA=a.v/b.C
  a-power Voltage ripple coefficient usually 1.2;
  v-DC Voltage (significant value only AC power);
  b-Tolerance usually take 0.85
  c-Ageing coefficient usually take 0.9
B:Withstanding surge current
  In general , withstanding surge current is max, Pulse current value which determined
  by test conditions such as wave-shape,amplitude and intermal time,when the amplitude 
  decrease to 50% of the initial,it should be increased to 2 times of the initial in 
  order keep the life longer,the surge current which is sbsorbed by the varistor should 
  be less than max. withstanding surge current.

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