BTA202X-600E,127

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Thyristors – TRIACS

A TRIAC (Triode for Alternating Current) is a three terminal electronic device that can be used as an electronic switch. It is part of the group of semiconductor components known as thyristors and behaves similarly to a pair of back-to-back SCRs (silicon controlled rectifiers). The TRIAC is closely related to the SCR and features a layered PNPN structure with two gates that can be used to control the flow of current through the device. TRIACs are capable of controlling large amounts of power thanks to their ability to switch higher voltages and currents than SCRs.

TRIAC - BTA202X-600E,127

The BTA202X-600E,127 is a thyristor - triac manufactured by STMicroelectronics. It employs a Snubberless™ SCR Technology and is specially designed for use in air conditioners, motor controllers, and power supplies. It is a sensitive gate device, designed primarily for AC switching applications in the 400−600VAC range. This device features low power dissipation, low turn-off surge, and fast turn−off rates.

Application Field

The BTA202X-600E,127 is utilized in a vast array of AC switcher applications, including power factor correction, motor controllers, and power supplies. It is also used in air conditioners to guarantee quick and reliable switching of the associated compressor motor.

Working Principle

The BTA202X-600E,127 features two gates located at each of its three terminals. When a voltage is applied across the gate and the main central terminal (MT1), it will trigger the TRIAC into conduction and allow current to flow through the device. With this logic, it is possible to control the flow of current in both directions. Releasing the voltage applied to the gate will turn the TRIAC off and break the current flow. In contrast, reapplying the voltage will immediately turn the TRIAC back on, allowing current to flow again.

Conclusion

The BTA202X-600E,127 thyristor-triac manufactured by STMicroelectronics is a powerful three terminal AC switching device capable of controlling large amounts of power. It is designed for use in a variety of AC switcher applications, such as power factor correction, motor controllers, and power supplies. This device features two gates that are used to control the flow of current through the device. When a voltage is applied to the gate, it triggers the TRIAC into conduction, allowing current to flow. Releasing the voltage will turn the TRIAC off and break the current flow.

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