15KP20

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A TVS (transient voltage suppressor diode) is a device widely used in the electrical application field for protecting circuits from transient overvoltage events, such as electrical spikes and surges. TVS diodes provide bidirectional protection from transient overvoltages and are typically available in both unidirectional and bidirectional configurations.Although TVS diodes can be used in many applications, they are often used in the application field of power over Ethernet (POE) systems. POE systems are used to provide power to network devices using Ethernet cables, and can be found in many commercial and industrial installations. In a POE system, a TVS diode is used to protect the Ethernet system from transient overvoltage events by limiting the amount of voltage that can pass through the system. This helps to prevent damage to the system and can further reduce the chance of failure caused by transient overvoltages.The working principle of a TVS diode is simple: if the voltage level reaches or exceeds a certain point, the diode will activate and limit the amount of current passing through it. The diode\'s breakdown voltage, called the "clamp voltage", is determined by the manufacturer and is set to be high enough to prevent any transient overvoltage from reaching the system.When the voltage exceeds the diode\'s specified clamp voltage during a transient overvoltage event, the diode will immediately react and start to limit the amount of current passing through it. This will absorb the excess energy and protect the system from any further damage.In addition to providing protection from transient overvoltages, TVS diodes are also capable of providing reverse mains protection. This means that they are able to prevent reverse current flow when the power supply is reversed. This helps to protect the system from any damage that may be caused by a reversed power supply.Overall, TVS diodes are a valuable tool in the electrical application field and are widely used in a variety of applications, such as POE systems. They provide bidirectional protection from transient overvoltages and are also capable of providing reverse mains protection. The working principle of a TVS diode is to limit the amount of current passing through it when the voltage level reaches or exceeds a certain point. This helps to prevent damage to the system and can further reduce the chance of failure caused by transient overvoltages.

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