BTA204X-800E/L03Q

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Thyristors - TRIACs

A TRIAC, or triode for alternating current, is a 3 pin thyristor device commonly used in motor speed control, light dimmers, mains power control and many other applications. BTA204X-800E/L03Q is a new generation of TRIAC from STMicroelectronics which has advantage of low switching losses and fast turn-on/turn-off time for design flexibility. This application note will discuss about the BTA204X-800E/L03Q device and its application field and working principle.

Application Field of BTA204X-800E/L03Q

The BTA204X-800E/L03Q is a three-lead TRIAC. It is especially useful for AC switching applications, such as motor speed control, light dimmers, mains power control as it offers low on-state resistance and sufficiently long life-span when operated in an appropriate junction temperature range.

The BTA204X-800E/L03Q is designed for use in residential and commercial heating controllers. This device is ideal for household products, lighting, small motor controls and small industrial appliances. It is reverse-polarity protected and can be used in applications up to 800V.

The BTA204X-800E/L03Q has optimized performance which offers low switching losses due to its low on-state voltage drop and fast turn-on/turn-off time for design flexibility in AC switching applications.

The BTA204X-800E/L03Q is a highly robust TRIAC with excellent surge capability, making it ideal for industrial equipment, such as machine tools, medical diagnostic equipment and pumps in demanding industrial environments.

Working Principle of BTA204X-800E/L03Q

A TRIAC is a three-pin semiconductor device which has an Anode and a Cathode, separated by a Gate terminal. When a small current is applied to the Gate terminal with respect to the Anode or Cathode, it will enable the device to conduct current in both directions, regardless of the polarity of the current.

The BTA204X-800E/L03Q has a low on-state resistance and a low gate current, which increases the lifetime of the device while minimizing switch losses. When the device is turned on, the anode-cathode voltage drop across the device is low compared to other TRIACs due to the low R_ON.

The BTA204X-800E/L03Q offers fast turn-on and turn-off times which lets the user save time and energy during the design process. This is due to its low gate current requirement, low gate charge and fast gate turn-on and turn-off times.

The BTA204X-800E/L03Q has a unique advantage of reverse-polarity protection which safeguards the device during prolonged power-cut situations.

Conclusion

The BTA204X-800E/L03Q is a three-lead TRIAC designed for AC switching applications such as motor speed control and light dimmers. It offers low switching loss, fast turn-on/turn-off time and reverse-polarity protection. The BTA204X-800E/L03Q is ideal for industrial applications such as machine tools and pumps, as well as residential and commercial heating controllers.

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