VDRS07H230TLE

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TVS (Transient Voltage Suppressor) components, including Varistors (also called VDRs or MOVs) are among one of the most important safety devices used in electrical circuits. VDR stands for Voltage Dependent Resistor, and MOV stands for Metal Oxide Varistor. The VDRS07H230TLE is a Varistor produced by Bourns, Inc. and is commonly used in a wide variety of applications as a form of protection. This article will explain the use of a VDRS07H230TLE, its application fields and its working principle.

The VDRS07H230TLE is a multi layer solid state Varistor with flame-retardant epoxy that is typically used in a wide range of markets. It can be found in various circuitry, such as automotive, telecommunications, computer, medical, consumer and industrial equipment. The Varistor can absorb and dissipate transient energy that is created by an electrical surge, providing the protection that is needed by the circuit. It is also used to protect against electrical noise, EMI, ESD as well as electrostatic discharge.

The VDRS07H230TLE can absorb transient surge energy up to 300A (8/20μs waveform, @10/1000 μs pulse) at 20V ratings. It has a nominal capacitance ranging from 78~110 pF, a maximum operating voltage of 115V, and a maximum clamping voltage of 157V. Its temperature range is -40°C to 110°C, and it is rated for an energy absorption of 367A2S. This makes it an ideal choice for many applications and is popular for its low capacitance, high current rating and low clamp voltage.

The working principle of the VDRS07H230TLE starts with the ceramic material between the two electrodes. This material is composed of metal oxide in the form of zinc oxide and is referred to as the "non-conductive state". When a voltage is applied to the Varistor, the metal oxide binds together and forms a conductive path between the two electrodes. This particular type of Varistor is known as "voltage dependent" because it is capable of adjusting its resistance depending on the provided voltage. When a voltage exceeding the Varistor\'s breakdown voltage is applied, the material becomes conductive and allows the current to pass through the device.

Once the current passes through the Varistor, the resistance fades and the current path is blocked. This process allows the Varistor to absorb the surge energy and its inductance prevents it from continuously conducting any current. The device also includes a thermal switch that shuts off insulation after the temperature rises and the circuit\'s continued power is detected. In this way, the VDRS07H230TLE protects the circuit from overvoltage conditions.

Overall, the VDRS07H230TLE Varistor from Bourns is a very useful and popular device. Its ability to absorb and dissipate transient energy, as well as its low capacitance, high current rating and low clamp voltage make it an ideal choice for many applications. Furthermore, its working principle of voltage dependent resistance and its protection against overvoltage conditions provide added assurance of its effectiveness.

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