V420LA40CP

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Transient voltage suppressors (TVS) are designed to protect electronic systems from high-voltage electrical transients or spikes such as those caused by lightning, welders, industrial equipment start up, and electrical noise generated by motors, solenoids, etc. Typically, TVS are semiconductor devices that feature high breakdown and a low clamping voltage, and they are offered in a range of package sizes, and can even be integrated into system circuit boards. Varistors (MOV – Metal Oxide Varistors) and Gas Discharge Tubes (GDTs) are two popular and commonly used TVS.

The V420LA40CP is part of the VAR series of TVS components that are used to protect electronic circuits from transients and overvoltages. It is a radial leaded varistor with peak pulse power dissipation rating of 1000 Watts (10 x 1000 µs waveform). This device has excellent EMI filtering performance at 150 dB, making it well suited for use in high-noise environments. Additionally, its package size is relatively small (4.7 mm x 4.7 mm) and therefore, can easily be integrated into high-density environments.

The working principle of this device is based on its MOV characteristics. In a transient condition, the voltage across the device exceeds its breakdown voltage, causing an avalanche breakdown of its electrodes. This effect causes a highly conductive path between the electrodes, allowing the injection of a large amount of current into the system. This current will be dissipated as heat in the form of Joule heating. This process continues until the voltage across the device is no longer exceeded, thus effectively providing a clamping action.

The V420LA40CP is suitable for protection against transients in a wide range of applications, including automotive, communications, consumer electronics, and industrial. It is also compatible with lightning spikes and electrostatic discharge (ESD). Additionally, the parts are marked with an ESD rating of 15 kV, making them suitable for use in systems that must withstand high ESD levels.

The V420LA40CP is an excellent choice for applications requiring protection against transient and EMI overvoltages. It has a wide range of operating voltages, high pulse power handling capabilities, and a small form factor. Additionally, its high ESD rating makes it suitable for use in harsh environments. With these features, the V420LA40CP is an ideal choice for protection against transients and overvoltages in automotive, communications, consumer electronics, and industrial applications.

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