| Resistance: | Standard |
|---|---|
| Installation: | DIP Varistor |
| Material: | Oxide Film |
| Type: | Ceramic Insulation Power Type |
| Shape: | Disc Shape |
| Application: | Surge Protection |
| Samples: |
|---|
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The "varistor" is a resistive device with nonlinear volt-ampere characteristics, which is mainly used for voltage clamping when the circuit is subjected to overvoltage, absorbing excess current to protect sensitive devices. The English name is "Voltage Dependent Resistor" abbreviated as "VDR", or "Varistor". The resistance body material of the varistor is a semiconductor, so it is a variety of semiconductor resistors. Now widely used "zinc oxide" (ZnO) varistor, its main material is composed of divalent element zinc (Zn) and hexavalent element oxygen (O). So from the material point of view, zinc oxide varistor is a kind of "II-VI oxide semiconductor".
The varistor is a voltage-limiting protection device. Using the nonlinear characteristics of the varistor, when an overvoltage occurs between the two poles of the varistor, the varistor can clamp the voltage to a relatively fixed voltage value, thereby realizing the protection of the subsequent circuit. The main parameters of varistor are: varistor voltage, current capacity, junction capacitance, response time, etc.
The response time of the varistor is ns level, which is faster than the gas discharge tube and slightly slower than the TVS tube. In general, the response speed of the overvoltage protection used for electronic circuits can meet the requirements. The junction capacitance of the varistor is generally in the order of magnitude of hundreds to thousands of Pf. In many cases, it should not be directly used in the protection of high-frequency signal lines. When used in the protection of AC circuits, the large junction capacitance will increase leakage. The current needs to be fully considered when designing the protection circuit. The flow capacity of the varistor is larger, but smaller than that of the gas discharge tube. Varistor, referred to as VDR, is a non-linear overvoltage protection semiconductor component that is sensitive to voltage.
1.Dimensions:
2.Mechanical Characteristics:
3.Reliability Characteristics:
▪ Wide operating voltage (V1mA) range from 18V to 1800V
▪ Fast responding to transient over-voltage
▪ Large absorbing transient energy capability
▪ Low clamping ratio and no follow-on current
▪ Meets MSL level 1, per J-STD-020
▪ Operating Temperature:-40ºC ~ +85ºC
▪ Storage Temperature:-40ºC ~ +125ºC
▪ Safety certification: UL: E327997 CSA: 246579 VDE: 40027827
▪ Transistor, diode, IC, thyristor or triac semiconductor protection
▪ Surge protection in consumer electronics
▪ Surge protection in industrial electronics
▪ Surge protection in electronic home appliances, gas and petroleum appliances
▪ Relay and electromagnetic valve surge absorption
why choose us :
advantage:
1.Produce Range
Yangjiang RUIXIAO Enterprise Co,.Ltd,major in the electronic component , who have wide range of products,
such as IC,resistor , capacitor , mosfet , diodes, module , LED, relay, lcd. pcb board . and so. the brand involves:SHARP, POWER, , NS, ON, ST , IR, VISHAY , TOSHIBA, FAIRCHILD,MICROCHIP, ATMEL,EVERYLIGHT all the kinds of electronic component you need will be find in here.
2.Production workshop
3.Scope of application
the product is widely used in Automotive industry control,new energy industry,Audio,Home appliances equipment,Communication industry.it can meet the diverse needs of customers
4.service:
with the "User first, customer first" Company motto, quality assurance , economic price , fast Delivery time is our only faith. we will try our best to make every customer to enjoy the the most flexible,efficient services.We sincere hope that we can seek the common development and cooperation with the customer together to achieve a win-win situation.
5.Logistics:
we can send the goods to the customer's country directly by the international logistics. no matter send by air or by sea.
we will try our best to let the customer to get the parcel more convenient .
(noted:Not bear any fee and tax of the transportation cost.)
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