Design Of Surge Protective Diodes
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Design Of Surge Protective Diodes
A surge protective diode is a device that is used to protect electrical circuits from high voltage or current transients, like surges caused by lightning strikes, electrostatic discharge (ESD), or power switching. It is commonly known as a transient voltage suppressor (TVS) or a surge suppressor diode. A good surge protective diode should meet several criteria. Firstly, it should have a low clamping voltage, which means that it should limit the voltage spike to a very low value compared to the protected circuit's voltage rating. This will ensure that the protected circuit remains functional after the transient event. Secondly, it should have a high transient power rating to handle high energy transient events effectively. Thirdly, it should have a fast response time to limit the duration of the voltage spike. The response time is determined by the junction capacitance of the diode. Therefore, diodes with lower capacitance values are preferred for high-speed transient events. Lastly, it should have a high surge current rating to protect the protected circuit adequately. In designing surge protective diodes, it is essential to consider their application and the environment they will operate in. To be effective, the diode must be installed as close as possible to the protected device. The design should also ensure that the diode does not introduce additional noise, distortion or attenuation to the circuit, which could impact its operation. In conclusion, a well-designed surge protective diode should have a low clamping voltage, high transient power rating, fast response time, high surge current rating, and should be installed close to the protected device.
Surge protective diode, Transient voltage suppressor, Clamping voltage, Transient power rating, Response time, Surge current rating
CITATION : "Christopher White. 'Design Of Surge Protective Diodes.' Design+Encyclopedia. https://design-encyclopedia.com/define/design-of-surge-protective-diodes?E=322098 (Accessed on October 14, 2026)"
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