metal oxide varistor 07D series

Metal Oxide Varistor 07D Series Description

Main Specification

Standard series
Varistor chip diameter: 7mm
High Joule series
Varistor chip diameter: 7mm

Electrical specifications

1. Pressure sensitive voltage: 18~820V
2. Maximum allowable voltage: 10~510V(AC) 14~670V(DC)
3. Flow capacity (for reference)@1KHz: 45-2800pf

Varistor 07D series product introduction and the role of surge protector

A Metal Oxide Varistor (MOV) is a type of nonlinear ceramic resistor element, primarily composed of zinc oxide. It plays a crucial role in protecting electronic devices by offering effective surge protection. Due to its voltage-sensitive resistance, the MOV metal oxide varistor rapidly becomes conductive when a specific voltage threshold is reached.

Metal oxide varistor surge protection is highly valued in various applications because of its excellent non-linear characteristics, including high surge current capacity, rapid response time, and the absence of continuous current flow after activation. These attributes make MOVs indispensable for protecting electronic equipment from overvoltage, such as lightning strikes or power surges, which can disrupt normal operations or damage critical circuit components.

MOVs are available in both symmetric (non-polar) and asymmetric (polar) types, allowing for versatile integration into different electronic systems. Whether used in surge protectors, lightning protection devices, or other voltage-sensitive equipment, metal oxide varistors ensure reliable performance and long-lasting protection.

By incorporating metal oxide varistor surge protection into your designs, you can effectively shield sensitive electronics from unpredictable voltage spikes, enhancing the durability and safety of your products.

Varistor Application

Metal oxide varistor Surge protectors, are extensively used across various fields of electronic engineering to safeguard essential equipment. These applications mainly include:

1. Communication Systems: Protecting telephones, network switches, and other communication infrastructure.
2. Electrical Systems: Shielding electricity meters, distribution cabinets, and power switches from voltage spikes.
3. Home Appliances: Ensuring the safety and longevity of household devices.

Specific products that utilize mov metal oxide varistor for surge protection include telephones, switches, electricity meters, distribution cabinets, socket boxes, power switches, power surge protection boxes, power voltage regulators, and lightning arresters (SPD surge protection).

The integration of metal oxide varistors in these devices is crucial for preventing overvoltage damage, ensuring reliable operation, and prolonging the lifespan of electronic systems across multiple industries.

Metal Oxide Varistor Working Principle 

The MOV metal oxide varistor plays a critical role in surge protection by dynamically adjusting its impedance based on the voltage it encounters. Under normal operating conditions, the varistor exhibits a high impedance (several megohms), ensuring it does not alter the original circuit characteristics of the protected electronic components.

However, when a transient surge voltage exceeds the breakdown voltage of the varistor, its impedance drastically drops to just a few ohms. This sudden change causes a short circuit in the original line, effectively diverting the surge and protecting the electronic products or components from potential damage.

By incorporating metal oxide varistor in surge protection designs, electronic systems are safeguarded against unexpected voltage spikes, ensuring continued reliability and longevity.

Advantages of MOV Metal Oxide Varistor

Metal oxide varistors (MOVs) are essential components in electrical circuits, offering numerous advantages that make them ideal for surge protection and voltage regulation. Below are the key benefits of using MOVs:

1. Broad voltage compatibility
2. High surge capacity and energy tolerance
3. High nonlinear response
4. Minimal leakage current
5. Balanced volt-ampere behavior
6. Reduced residual voltage
7. Rapid response time
8. No persistent current
9. Stable voltage ratio
10. Robust surge absorption
11. Efficient surge current handling
12. Consistent voltage suppression
13. Premium materials
14. Reliable performance
15. Extended lifespan.
16. Broadly applied

Metal Oxide Varistor Naming Rules

MOV Metal Oxide Varistor Packing Specifications