V300LS2PX2855

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TVS (Transient Voltage Suppressors) Varistors, MOVs (Metal Oxide Varistors) are some of the most commonly used components for providing circuit protection against electrical transients. V300LS2PX2855 is an example of such a device from Vishay Semiconductors that provides protection from high voltage transients such as those created from electrostatic discharges, lightning strikes, or power-crossing events. It is rated for a working voltage up to 500V, or 330V for repetitive events.

The V300LS2PX2855 application field is mainly used for data processing and communication equipment, as well as for battery protection in automotive and emergency power supplies. It is designed to help protect sensitive electronic components from over-voltage transients and ESD (Electrostatic Discharges) that can enter the system through power supplies, ports, signal lines, etc. It helps to protect sensitive electronic components from permanent damage and extend the lifespan of the entire system.

The V300LS2PX2855 gets connected in series with the supply voltage, or across the data/signal lines, such as in the above diagram. Its working principle is based on the PN junction diode that provides a low-impedance path for current flow during a transient event. During normal operating conditions, the parasitic capacitance between the line and ground forms a reverse-biased circuit with the diode, which effectively blocks the current flow.

When the transient voltage reaches or exceeds the working voltage threshold, the capacitance builds up between the line and ground, allowing a low-impedance path for current to flow. The current then flows through the diode, which acts as a limiter, dissipating the current in the form of heat. This helps to protect sensitive electronics and components from getting damaged due to over-voltage transients.

The V300LS2PX2855 also has excellent clamping capability, with a maximum peak pulse current of 15kA @ 8/20μs and a peak pulse power dissipation of 400W per line. It also has a high surge capacity of up to 500V, which helps to protect the whole circuit from damage caused by power-crossing events. The device is also designed in a very small package, making it suitable for use in space-constrained applications.

In short, the V300LS2PX2855 is a highly efficient and reliable MOV for providing circuit protection against transients and ESD pulses in data processing, communication and automotive systems. It works by providing a low-impedance path for current to flow during transient events, thus helping to protect sensitive components from getting damaged due to over-voltage transients. It also has high surge capacity and an excellent clamping capability, making it suitable for use in high-reliability applications.

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