BTA425X-800BQ

Thyristors - TRIAC is a kind of triode for alternating current (AC), which belongs to three-terminal semiconductor components. It is an on-off switch. The BTA425X-800BQ is an 8A bidirectional electronic switch built from a Thyristors - TRIAC. It is designed to control low-power AC loads in an AT or BT line, suitable for mains breaker applications, including electronic lamp ballasts, fan speed controllers, and home appliance control. It is also suitable for inductive motor, transformer, heater and AC resistive load with low-power.

The working principle of The BTA425X-800BQ can be divided into two parts: turn-on and turn-off. In the turn-on state, the signal current is applied to pins MT1 and MT2, forming a low-power signal circuit, which is amplified to form a capacitive current. The capacitive current flows through the thyristor grid to MT2, transistor turn-on, triggering the current between MT1 and MT2. In the turn-off state, the internal resistance of the Thyristors - TRIAC increases rapidly with the decrease of the current, so that the thyristors switch off widely.

The advantages of BTA425X-800BQ are strong driving ability and good dynamic characteristics. The driving ability of its turn-on is high, but the total delay current of its turn-off is very small, so it is suitable to use in high-frequency AC switch control circuit. In addition, it also has low power consumption and power loss, good EMC performance, high temperature and reliability, wide working temperature range etc. Application fields include lighting and lamp control, temperature and humidity control, industrial automation, AC motor speed control, AC load switch and other low-power AC load control applications.

In summary, BTA425X-800BQ is an 8A bidirectional electronic switch built with Thyristors - TRIAC, and it can be used in low-power AC switch control circuits. It enjoys the advantages of high driving ability and small total delay current of its turn-off, low power consumption and power loss, good EMC performance, high temperature and reliability, and so on. These superiorities make BTA425X-800BQ suitable for lighting and lamp control, temperature and humidity control, industrial automation, AC motor speed control, AC load switch and other low-power AC load control applications.