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TVS - Varistors, MOVs

The VDRS05C460BSE is part of the extensive line of Varistor/MOVs (metal oxide varistors) engineered by Vishay for direct voltage protection. This device features 5mm radial leaded design with ratings up to 500V, ideal for the circuitry of many electronic devices. The VDRS05C460BSE is particularly suited to battery-pack applications due to its lightweight and small size.

Application

These Varistors/MOVs are mainly utilized in a wide range of electronic assemblies, including consumer electronic devices, LED lamps, factory automation, PCbs, power supply and security systems. It is designed to deliver reliable performance by responding quickly to critical overvoltage settings and offering built-in protection against power surges.

Working Principle

Varistors/MOVs generally operate based on the principle of the solid-state media deformation. The varistor core is a disc made from zinc oxide particles pressed together into a cake. When voltage supplied, the variable resistance elements inserted into the core compete with each other and spread the voltage due to the difference in its inductance. When the voltage reaches the breakdown voltage characteristics of the varistor, the particles released their charge and the resistance of the core is reduced, and the current is forced through the core. As the voltage continues to rise, the current flowing through the core continues to increase until overload protection, protecting the equipment against high-voltage conditions.

Advantages

The VDRS05C460BSE offers a host of advantages including stable temperature characteristics, making it an ideal choice for applications in which a high degree of repeatability is required; Low leakage current; Low capacitance, letting the component to be used in high-frequency circuits; Continuous varistor voltage, achieving high accuracy at high voltages, with no need for full voltage resistance testing; Low dynamic resistance, improving the efficiency of the circuit.

Conclusion

In conclusion, the VDRS05C460BSE is a reliable, cost-effective varistor/MOV and is suitable for a wide range of applications with its low leakage current, low capacitance, and continuous varistor voltage capabilities. It is also easy to install, thanks to its 5mm radial leaded design, and delivers reliable overvoltage protection and efficient performance.

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