T627082054DN

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Thyristors - SCRs (also referred to as silicon-controlled rectifiers) form the basis of many industrial processes, including the operation of a variety of specialized devices such as variable speed drives and low voltage lighting systems. The T627082054DN is just one of many SCRs designed to meet the specific requirements of a given application. In this article, we’ll explore the application field and working principle of this popular SCR.

Application Field

The T627082054DN SCR is specifically designed for the control of AC motor drives in household, industrial and commercial applications. Its unique design enables the device to accept standard DC control signals, before effectively responding to supply varying AC motor speeds. In addition, the device features a built-in power fail detector and overvoltage protection.

The device is primarily intended for use as a single quarter bridge in a three-phase AC motor control circuit. It can also be used to control various AC motor applications, such as floor cleaners, machine tools and household appliance. The device is optimised for the direct control of AC motors that require a low switching frequency.

Working Principle

The T627082054DN SCR utilises a specialised silicon structure, consisting of two p-n junctions and three interconnecting layers. It works by allowing current to pass from the anode to the cathode after a positive voltage is applied to the gate. This action occurs due to a diode-like structure, created by the n-type junction, that allows the gate to stay on even after the positive gate voltage is removed. This structure is referred to as \'negated latching\' and is what enables the SCR to remain in the on state even after power is removed.

Once the device has been turned on, the SCR will remain in this \'on\' state until the current drops to a value below the holding current. This can be achieved by reducing the level of voltage across the device or by introducing a \'commute\' signal. The commute signal acts as a reverse bias and cuts off current between the anode and the gate, allowing it to turn off.

In order to optimise its performance, the device should be allowed to cool during operation. This can be achieved by using a suitable thermal management system, such as an appropriate heatsink. This is important, as overheating can lead to damage to the device and may create an unsafe environment.

Conclusion

The T627082054DN is a versatile SCR, optimised for use in a number of industrial and commercial applications. It combines the advantages of a standard SCR with increased efficiency and safety features, such as a built-in power fail detector and overvoltage protection. With this in mind, the T627082054DN is well suited to a variety of tasks and should be considered when selecting a suitable device for an AC motor drive.

The specific data is subject to PDF, and the above content is for reference