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TVS - Diodes

In their simplest form, TVS (transient voltage suppressors) are diodes designed to protect circuits from overvoltage phenomena such as a lightning stroke or power surges on the mains supply. TVS diodes provide equivalent protection as lightning arrestors, but take up less space and with a lower cost. The ATV30C140JB-HF is an example of one such TVS diode. This device provides a low clamp voltage and high peak power capability and is an ideal protection circuit for automotive systems. It has a low capacitance of 1.3 pF, which makes it well suited for applications where high bandwidth is needed, such as in audio/video systems.

Working Principle

TVS diodes act like an anode, both in normal operation and under overvoltage conditions. The diode is normally open (reverse-biased), so current does not flow, but when a transient voltage is applied, it becomes forward-biased and enables the current to flow. This current then passes through the diode safely and so the circuit is protected from voltage spikes. The ATV30C140JB-HF has an ultra-low clamping voltage of 15V, making it an ideal protection mechanism for many automotive systems. Additionally, the device is rated up to 30A with continuous current, making it one of the highest current rating TVS diodes on the market. Its integrated surge antibody ensures the highest reliability under severe surge environment.

Fields of Application

The ATV30C140JB-HF is particularly useful for automotive and industrial applications where transient overvoltage protection is needed. Its high peak power capability and low series impedance make it an ideal choice for systems that need fast system recovery from transients. For automotive systems, such as engines and ECUs, this device can provide reliable protection from transient overvoltage from any external source; such as lightning strike or power surges. The device is also suitable for protecting systems used on the production line where voltage transients could cause significant damage. The relatively low capacitance of 1.3pF also makes the ATV30C140JB-HF an ideal choice for audio/video systems where high bandwidth is required. The device has excellent frequency characteristics, making it suitable for use in high-end entertainment systems.

Conclusion

The ATV30C140JB-HF is an ideal choice for automotive and industrial applications requiring overvoltage protection, due to its low clamping voltage and high peak power capability. Its low series impedance and integrated surge antibody make it the ideal solution for protecting circuits from any external source of transient voltage overvoltage. Finally, its low capacitance and excellent frequency characteristics make the device suitable for any application where high bandwidth is required. The ATV30C140JB-HF is a great choice for any system requiring transient protection.

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