TN815-800H

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TN815-800H Application Field and Working Principle

Thyristors - SCRs (silicon-controlled rectifiers) are components used to control the flow of electricity and are widely used in industrial control applications. The TN815-800H is one type of SCR. This article will discuss the application field and working principle of the TN815-800H.

The TN815-800H is a three-terminal, unidirectional, current-controlled thyristor. Generally, it is mainly used for AC switching, AC power control and AC rectification. Its unique features such as fully-rated current capability, low on-state voltage drop, short turn-off time, etc., make it well-suited for rectification, protection and power supply applications, especially for uninterruptible power supplies.

The TN815-800H has three main terminals: anode, gate and cathode. The anode is connected to the positive side of the power source. The cathode is connected to the negative side of the power source. The gate is the control terminal. When a negative voltage is applied to the gate, the thyristor becomes conductive and triggers the turn-on switching operation.

The working principle of the TN815-800H can be summarized in four steps. First, when no voltage is applied to the gate, the thyristor is in its reverse-blocking state. If a negative voltage is applied to the gate, the level of current flowing through the thyristor increases slowly. This is known as the latched-up state. Second, after a critical value is exceeded, the thyristor enters the triggering stage, where the level of current flowing through the thyristor increases rapidly. Third, when the thyristor is sufficiently triggered, it enters its on-state, allowing current to flow in one direction. Finally, when the applied negative voltage is removed, the thyristor turns off and its current flow is cut off.

In summary, the TN815-800H is a three-terminal, unidirectional, current-controlled thyristor that is mainly used for AC switching, AC power control and AC rectification. Its working principle involves four steps: reverse blocking, latching-up, triggering, and on-state. The TN815-800H is a versatile component and its unique features make it a popular choice for industrial control applications.

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