VE09M00400KD5

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TVS - Varistors, MOVs - are electrical components designed to protect electronic circuits from overvoltage transients. The VE09M00400KD5 is one such component. This article will explore the application field and working principle of this device.

Application field

The VE09M00400KD5 is designed to protect against high level transient voltages of up to 500V. This device can be used in a number of applications such as lighting ballasts, telecom applications, automotive electronics and consumer electronics. Furthermore, it is suitable for high frequency applications and can be used as a primary line protection device.

This device is designed to provide overvoltage protection in applications that require high levels of reliability and low operational costs. The VE09M00400KD5 features a wide operating temperature range of -40°C to +125°C and is compliant to meet the requirements of UL, CSA, and IEC standards.

Working Principle

The VE09M00400KD5 is a Varistor. Also known as Voltage-Dependent Resistor (VDR), this device utilizes a voltage-dependent semiconductor to achieve overvoltage protection. When not operating, the VDR acts like a regular resistor, allowing a small current to pass through. When the voltage across the device exceeds a certain threshold, the VDR turns into a low-resistance path, dissipating the excess current and protecting the underlying circuit from overvoltage.

The VE09M00400KD5 utilizes Metal Oxide Varistor (MOV) technology. The device consists of alternating layers of metal oxides and electrodes sandwiched between two metal plates. When the applied voltage exceeds the breakdown voltage of the MOV, the metal oxides are subjected to avalanche breakdown, allowing current to flow through the device and thus providing overvoltage protection. The VE09M00400KD5 features a MOV with a maximum breakdown voltage of 400V.

In addition to providing overvoltage protection, the VE09M00400KD5 also helps reduce electromagnetic interference (EMI). The MOV absorbs the noise generated by the circuit, thus providing additional protection against short-term voltage spikes or transients.

The performance of the VE09M00400KD5 is further enhanced by the inclusion of a special Multilayer EMI filter. This filter helps reduce EMI noise by allowing only low frequency signals to pass through, thereby providing excellent EMI filtering capabilities.

In summary, the VE09M00400KD5 is a Varistor designed for overvoltage protection in high-reliability applications. It utilizes a Metal Oxide Varistor to ensure high-level protection against overvoltage and transients. Additionally, the device features a Multilayer EMI filter which helps reduce EMI noise as well as provide additional protection from short-term voltage spikes.

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