VE24M00131K

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OVERVIEW
VE24M00131K, also known as Metal Oxide Varistor (MOV), is a semiconductor device commonly used to protect electrical circuits against transient voltage surges. It is a device which consists of metal-oxide grains in an insulator body, and is designed to provide protection to electronic equipment against electrical power disturbances. This type of device operates by rapidly increasing its resistance by several orders of magnitude within a few microseconds when exposed to voltage spikes and/or transients.

APPLICATION FIELDS
The primary application of the VE24M00131K Metal Oxide Varistor (MOV) is to protect sensitive electronic features by absorbing transient voltages and reducing the risk of damages caused by them. To provide this protection the MOVs are used to limit the voltage between two connecting lines. It can be used to raise or lower the potential between two lines, depending on the application, and can be used for the protection of high-gradient advantages like circuit boards, ICs, and other circuit components.

The function of the MOV in electronics is mainly to protect against fast over voltages which occur due to lightning, switching, or some other transient effects. Moreover they can act as current limiters, providing additional safety. MOVs can also be used to reduce the risk of electric shocks, as they act as a fuse when a particular voltage is exceeded and, therefore, eliminating the power flow and preventing hazardous electric shocks.

In addition to protection of sensitive components against overvoltage, the VE24M00131K Metal Oxide Varistor can also be used to reduce EMI/RFI, by forming an L-C filter. The MOVs can be incorporated in shielded enclosures with other EMI/RFI-reducing components, such as capacitors and inductors, to create a low-pass filter, very useful in audio applications where unwanted frequencies must be blocked.

WORKING PRINCIPLE
The VE24M00131K Metal Oxide Varistor is composed of two parts: the varistor and the insulating body. The varistor itself is composed of zinc oxide and an alloy of manganese and bismuth, which are molded into a rod shape and then encased in an insulating ceramic material. The main active components of the varistor are the zinc oxide grains, which are the elements that will respond to electrical disturbances.

Working principle of the Metal Oxide Varistor is based on its material characteristics. Each grain has a relatively high resistance, but when voltage is applied between two electrical connections, the grains will increase their resistance rapidly which effectively suppresses the transient voltage. This resistance increase rate is very high compared to the resistance of other components — typically in the range of millions of ohms per microsecond, which protects the device from damage and prevents any disruption of its operation.

The varistor’s response time will depend on the applied voltage and its temperature. It will increase its resistance quickly if configuration is below 70°C; above this value, its response time will get longer, making it difficult to achieve effective protection against fast transients. It’s also important to note that the MOVs will work at any voltage between its maximum and minimum limits; however, its effectiveness is highest within its operating range, and its protection efficiency decreases outside this range.

Since each varistor has a unique behavior, the VE24M00131K Metal Oxide Varistor has its own characteristics, making it suitable for specific applications. This type of MOV is defined by its clamping voltage (Vclamp) and its resistance (Rnominal). Its Vclamp ranges from 130V to 800V with a Rnominal value of 12k ohms, which makes it suitable for medium-voltage operations.

CONCLUSION
VE24M00131K Metal Oxide Varistor is a semiconductor device used for protective applications ranging from lightning strike and electrical over-voltage protection to EMI/RFI reduction. This device has its own unique characteristics, such as clamping voltage range and resistance value, which make it suitable for certain applications. It is composed of non-meltable zinc-oxide grains that respond quickly to transients and suppress its voltage, thus protecting the device from any damage.}

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