T72H1045B4DN

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Thyristors-SCRs

A thyristor, also known as a silicon-controlled rectifier (SCR) is a semiconductor-based solid-state device composed of three terminals, commonly known as a \'gate\', \'anode\', and \'cathode\'. In most cases, it is used to switch large currents between the anode and cathode when triggered, which makes it an ideal power control device. The controlled rectifier T72H1045B4DN is a four-terminal switching thyristor that is primarily used in motor speed control and motor start-up applications. This article will provide an overview of the T72H1045B4DN\'s application field and working principle.

Application Field

The T72H1045B4DN is a versatile power control device designed to switch large currents between two levels. It is commonly used in motor speed control and motor start-up applications. In motor speed control, the T72H1045B4DN is used to adjust the speed of the motor by controlling the amount of current flowing through the motor. In motor start-up applications, the T72H1045B4DN is used to commence and maintain speed in the motor. In addition, the device is also suitable for controlling loads such as resistive, capacitive and inductive loads.

Working Principle

The T72H1045B4DN is composed of four terminals, namely the anode, cathode, gate and control gate. When the gate and control gate terminals are left open, no current can flow through the thyristor; however, when a suitable trigger voltage is applied to the gate terminal, the thyristor will begin to conduct current between the anode and cathode. This phenomenon is known as latching. To switch off the device, the control gate voltage must be reversed, which will cause the thyristor to turn off.

The T72H1045B4DN also has a voltage ratings range. It can handle voltages between 600V and 1200V, and a maximum current of 45A. The device is designed to withstand temperatures from -20°C to 100°C, and feature a relatively low switching time of 3µs (microseconds).

Conclusion

In conclusion, the T72H1045B4DN is a four-terminal switching thyristor that is used primarily in motor speed control and motor start-up applications. It is composed of four terminals and is capable of handling voltages between 600V and 1200V and a maximum current of 45A. It is designed to withstand temperatures from -20°C to 100°C, and has a relatively low switching time of 3µs. This makes the T72H1045B4DN a reliable power control device in a variety of different applications.

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