BTA425X-800BT/L02Q

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Thyristors are a type of semiconductor component used in switch mode power supplies and motor speed control circuits. These components are also known as rectifiers, thyristor rectifiers, and triacs. The BTA425X-800BT/L02Q is one such thyristor. In this article, we’ll look at its application field and working principle.

Application Field

The BTA425X-800BT/L02Q is a medium power thyristor designed for applications where modest switching performance is required. It is primarily used in power control circuits that require low to medium power handling. This component is also suitable for use in single-phase or three-phase rectifiers and motor speed controllers.

Working Principle

The BTA425X-800BT/L02Q is a four layer, silicon-controlled rectifier (SCR) that can be triggered using a single pulse. This component operates by forming a conducting path between two external terminals when a current of the correct polarity and magnitude is passed through the gate terminal. Once the current is applied, the thyristor remains in the conducting state until the current drops below the hold current value. At this point, the thyristor will switch off, breaking the conducting path.

This component can be triggered in either phase control or peak current-mode applications. In phase control applications, the thyristor conducts for a certain period of each half-cycle as determined by the phase control angle. This type of control is used in single-phase or three-phase rectifiers for power control applications. In peak current-mode applications, the thyristor is switched on and off in order to control the peak current in the circuit. This type of control is often used in motor speed control circuits.

The BTA425X-800BT/L02Q has a maximum blocking voltage of 800V and a maximum peak repetitive current of 200A. It has a maximum gate trigger voltage of 1.5V and a maximum turn-on time of 5μs. This component is available in a variety of packages, including TO-220AB, TO-262, and SMH152.

In conclusion, the BTA425X-800BT/L02Q is a medium power thyristor designed for applications requiring modest switching performance. Its application field includes low to medium power control circuits, single-phase or three-phase rectifiers, and motor speed control circuits. It is triggered by passing a current of the correct polarity and magnitude through the gate terminal and can be used in either phase control or peak current-mode applications.

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