V420LU40CP

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The V420LU40CP is a Varistor developed by Littel Fuse, a world leader in providing circuit protection solutions. It is designed to protect against external disturbances such as surges, spikes, transients and electromagnetic interference. The V420LU40CP is ideally suited for the protection of sensitive digital components such as computers, telecommunications equipment and power supplies.

The V420LU40CP is an 4-terminal surface mount component. It measures only 8.8 mm x 7.9 mm and has a current rating of 40A, with peak surge ratings up to 550A. The V420LU40CP has a maximum DC voltage rating of 420V, and an automatic varistor voltage range from 11.5V - 420V. The V420LU40CP also features very low leakage current, with a maximum value of 1µA.

TVS (Transient Voltage Suppressor) is widely used for protecting delicate electronic circuits against electrical overstress due to voltage spikes and other transients. A typical TVS can provide 15V to 24V of protection and is usually composed of a diode, resistor, and a zener diode. A MOV (Metal Oxide Varistor) is also known as a varistor (Voltage Dependent Resistor). MOVs are used to protect circuits from large voltage transients, such as lightning strikes, power surges, and other power line disturbances. MOVs come in a variety of sizes, shapes, and ratings, and are usually made from zinc oxide material.

The working principle of the V420LU40CP is based on a unique property of semiconductors known as “reverse voltage breakdown”. In a semiconductor diode, when the voltage across the diode is increased, the current through the diode will increase exponentially in a process called “reverse voltage breakdown”. This process occurs when the electric field that is induced in the diode exceeds a certain critical level. The V420LU40CP utilizes this property to effectively limit the voltage spike or transient to a safe level, thus preventing damage to the circuit.

The V420LU40CP has a wide variety of applications, including protection from television interference (TVI), overvoltages, and power overloading. It is also used in the protection of data and power line signalling. It is commonly used in data and industrial systems, medical systems, telecommunications systems, consumer electronics, automotive systems, and power supplies. The V420LU40CP is UL listed and meets automotive AEC-Q200 automotive surge tests.

In summary, the V420LU40CP is a 4-terminal surface mount component that is ideal for use in the protection of sensitive digital components. It is designed to protect against external disturbances such as transients, surges, spikes, and electromagnetic interference. It utilizes the reverse voltage breakdown principle to effectively limit voltage spikes and transients to a safe level. The V420LU40CP has a wide variety of applications, including TVI protection, overvoltages, power overloading, data and power line signalling, and is also UL listed and meets automotive AEC-Q200 automotive surge tests.

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