TVB400RSC-L

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TVB400RSC-L semiconductor thyristors belong to the TVS (Thyristor family). They are used in a wide range of applications, including high voltage, medium voltage, and low voltage applications. In terms of the thyristors’ working principle, it is important to understand the three unique stages of conduction that occur when a voltage is applied. These conduction stages, known as turn-on, steady state, and turn-off, are detailed below.

Turn-on Mode

The turn-on mode of operation occurs when a voltage is applied across the thyristor. In this mode, the thyristor is “closed”, meaning that current is able to flow through the device. The thyristor gate must be open to initiate the conduction process. The trigger current and voltage rating must be exceeded in order to turn-on the thyristor. Once the thyristor has been turned on, it will remain in this state until the voltage is removed or the current drops below the reverse blocking current rating.

Steady State

In the steady state, the thyristor is fully turned-on and conducts current with no voltage across it. This stage is known as the latching state because the thyristor cannot be turned off once it is in this state. The current through the thyristor depends on the load connected to the device.

Turn-Off Mode

The turn-off mode of operation occurs when the current through the thyristor is lowered below the reverse blocking current rating. This causes the device to turn off and no longer conduct current. The device can also be turned off externally by reversing the voltage across it or by applying a lower forward voltage. This is known as commutation.

Applications of TVB400RSC-L Thyristors

The TVB400RSC-L thyristors can be used for a variety of applications, including high voltage, medium voltage, and low voltage applications. It is also suitable for switching speeds up to 75 kHz and high peak current capacities up to 4500 A. These devices are frequently used in rectifier bridges, lighting systems, controls, power supplies, and motor control circuits. They are also suitable for AC and DC machines and may be used as suppressors for TEMPEST displays.

Conclusion

TVB400RSC-L thyristors are versatile and effective semiconductor devices that can be used in a wide variety of applications. They are suitable for switching speeds up to 75 kHz and feature high peak current capabilities. In terms of their working principle, TVB400RSC-L thyristors must go through three distinct stages of conduction: turn-on, steady state, and turn-off. Understanding these stages can help to ensure that the device is working correctly and reliably.

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