1.VDR standed for Voltage Dependent Resistor generally call "varistor" in the mainland of China. It means the resistor which its resistance changing along with the changing of the voltage within the range of rate current and rate voltage.
The major material of its resistor body is semiconductor, so it is also belong to the semiconductor resistor series. Nowaday, there are a lot of the ZnO varistors in circulation. ZnO is made up of Zn and O, so in term of material ZnO varistor is a ?-? oxid semiconductor.
In Taiwan, Varistor is called SPD after its purpose?
2. How varistor works? The trait of the varistor is when the voltage which put on the varistor lower than its UN, the current which flows through it is few, by contraries, when the voltage is higher than its UN, the current which flows through it skyrocket. By utilizes this character, the electric circuit can be free of the harm of the thundering voltage.
The apply range of the ZnO varistor is more and more comprehensive, with advanced facilities and strict controlling, Hongzhi Enterprises Co. can fill in you in this domain.
We has been specializing in manufacturing Ceramic Capacitor,Y type capacitor,Varistor(Transient Voltage Surge Suppressors),metallized polyester film capacitor,Multilayer Capacitor,NTC thermistor for many years.
Our production have approved by IS09001:2000?GB/T24001-2004 idt ISO14001:2004?VDE?UL?CSA?CQC?F1 ?N?D ?S etc.Our factory located at Shantou City,GuangDong Province,China,and outstations set up in Shenzhen Special Economic Zone and Hongkong.It's very convenient for us to transport without any delay.Now most of our product are exporting to USA,Europe,Korea etc.We look forward to building business relationship with you in the near future.
You may also visit our online company introduction at Http://www.hongzhi.net which includes our latest product line. pls feel free to contact us anytime.
Shantou factory Tel no.:86-754-88854060 Fax No.:86-754-8888417.
Hongkong branch:Tel No.:00852-23412900 Fax:00852-27903481.
Contact person:Faye wu.
E-mail adress:Hel@hongzhi.net