Welcome to Shenzhen Chuang Na Electronics Co.,Ltd.
CVR 20D621K
1) MAX ALLOWABLE VOLTAGE: 385Vac, 505Vdc
2) VARISTOR VOLTAGE AT 1mA: 558V ~ 682V
3) RATED WATTAGE: 1.0W
4) MAX CLAMPING VOLTAGE AT 100A: 1025V
5) WITHSTANDING SURGE CURRENT 8/20μS: 6500A/1 TIME, 4000A/2 TIMES
6) MAX ENERGY 10/1000μS: 224J
7) TEMPFRATURE COEFFICIENT: 0~0.05%/℃
8) CAPACITANCE: 650PF (reference)
9) LEAKAGE CURRENT: ≤20μA
10) COATED MATERIAL: blue flame retardant epoxy resin (UL 94 V-0 standard)
11) MAIN MATERAILS: ZnO
12) OPERATING TEMPERATURE: -40℃ ~ +85℃
13) STORAGE TEMPERATURE: -40℃ ~ +125℃
14) CERCIFICATION:
Zinc Oxide Varistor
Zinc oxide varistor is zinc oxide (ZnO) as the main material, add a variety of other trace elements, through mixing, granulation, dry pressing, sintering, printing, electrode welding, encapsulation, test, print and other processes is made of compound semiconductor element, zinc oxide varistor has excellent nonlinear characteristics and wave surge capacity, and in the field of communications, instrumentation, industrial control, lightning are widely used for over-voltage protection, surge suppression and so on many aspects, after these years of development, zinc oxide varistor technology level, quality and application have been greatly improved. Is currently the most promising application of pressure sensitive components. In Taiwan, the varistor is also known as the surge absorber ", sometimes also known as" electric shock (surge) suppressor (absorber) ".
The basic characteristics of ZnO - sensitive resistor are the nonlinearity of the current voltage relationship (Figure 1), and the nonlinearity of the voltage resistance (Figure two).
When added in it at both ends of the voltage lower than a threshold voltage (varistor) and its resistance value greatly, megohm level, and when added to it at both ends of the voltage exceeds the threshold voltage resistance value with the voltage increased and decreased rapidly, small to Ohm or milliohm level (Figure 2).

Because of the above characteristics of the pressure sensitive resistor, it is very suitable for attracting the lightning, electrical system operation, and the impact of static electricity, and effectively protect all kinds of electrical and electronic products, in particular, a variety of information and control technology of integrated circuits.

Product Feature
1) Meet RoHS requirements.
2) Body size is 5mm ~ 20mm.
3) Wide range of 18V ~ 1800V (Operating voltage range 11Vac~1000Vac).
4) Great power 100A ~ 10000A (@8/20 μs) for suppressing surge current.
5) Radial lead epoxy resin package.
6) Superior limiting voltage characteristics.
7) Low leakage current.
8) No polarity and symmetry of the volt ampere characteristics.
9) Low cost.
10) Wide operating temperature range of -40℃ ~ +85℃.
11) Security authentication UL/CUL/VDE/CQC.

Application Domain
1) power supply.
2) household appliances.
3) industrial equipment.
4) communication equipment.

Product Naming Rules

1) brand name;
2) chip diameter: 05=Φ5mm, 07=Φ7mm, 10=Φ10mm, 14=Φ14mm, 20=Φ20mm.
3) wafer type.
4) nominal voltage:The first two digits of the number of valid digits after the representation of an effective number.
5) the error of the pressure sensitive voltage: K = 10%, L = 15%, M = 20%.
6) high Joule product.

Product Print Style


Product Dimension


Label Style


Product Packaging




Contact Us
  • Tel:+86 (0755) 29760418
  • Fax:+86 (0755) 29611548
  • QQ:1740270758
  • E-mail:chuangna@cn-cvr.com
  • Add:B,11 Floor, Building A, Jingang Technology Zone,
    Qiaotou, Fuyong Town, Baoan District, Shenzhen,
    Guangdong, China  518103