V18MLA0805LH Circuit Protection

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TVS Varistor MOVs are used to protect a variety of electrical and electronic circuits from damage and destruction due to electrostatic discharge (ESD) and other transients. They can also provide EMI/RFI filtering. The device is typically a zinc oxide element encapsulated in glass or filled with ceramic, metal oxide, and other material depending on application requirements.

The V18MLAO805LH is a metal oxide varistor designed for overvoltage and overcurrent protection in automotive electronics applications. These devices have an overload capability of 8 A (sustained) and 16 A (peak). The varistor is designed to be placed on the power input to a circuit board to provide protection in the event of an increase in the input voltage. The devices are capable of handling up to 24 V of reverse polarity and will reset themselves once the overload has cleared.

The varistor works on the principle of voltage variable resistance. In normal operation, the resistance of the varistor is very high, in the range of millions of ohms. The resistance of the varistor drops as the voltage increases due to the nonlinear conduction of the zinc oxide element. Once the voltage reaches a certain threshold, the resistance decreases more quickly and the device begins to act as a short circuit, allowing the current to flow directly across the device. This prevents further voltage spikes and protects the circuit from damage.

The V18MLAO805LH is ideal for automotive applications due to its wide operating temperature range, low leakage current, and wide range of available capacitance values. The device also features an overvoltage-clamping capability to protect sensitive components from accidental contact with high voltages. In addition, the low ESR of the device helps to minimize excess heat, making it suitable for use in high-power applications.

Due to its high current ratings and low on-state voltage drop, the V18MLAO805LH is often used in automotive battery and powertrain systems. It can be used for surge and reverse polarity protection, as well as EMI filtering. Additionally, the device can be used to protect against short-circuit, open-circuit, and overvoltage faults.

In conclusion, the V18MLAO805LH is a metal oxide varistor designed for use in automotive electronics applications, specifically to protect against overvoltage and short-circuit faults. The device’s wide operating temperature range, low leakage current, and wide range of available capacitance values make it well suited for automotive applications. In addition, the device’s overvoltage-clamping capability and low ESR make it suitable for high-power applications such as automotive battery and powertrain systems.

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