T5070680B4AQ

Thyristors - SCRs

Thyristors - SCRs (silicon-controlled rectifiers) are widely-used, reliable and impressive three-terminal bi-directional semiconductor devices. They have been in production for more than 60 years, and along with their combination as a bidirectional package, SCRs are widely-used for controlling power in many different applications. The T5070680B4AQ is a type of SCR that is common in many applications. In this article, we will explore the application field and working principle of the T5070680B4AQ.

Application Field

The primary application field of SCRs such as the T5070680B4AQ is to control power in industrial motor and motor drive applications. SCRs are beneficial in these applications, as they are able to control power in either direction by simply adjusting their conduction angle. This makes them ideal for applications such as electric heaters, welding, coffee makers, motorized conveyor applications and other high-power applications.

SCRs are also used in AC motor speed control, UPS systems, power factor correction, power relay applications and other industrial automation processes. Additionally, SCRs have recently seen increased use in automotive applications, as they are used to control current in engine ignition, cruise control, and airbag deployment systems.

Working Principle

In general, an SCR is a three-terminal, bidirectional device that is capable of controlling power in both directions. The three terminals are named anode, cathode and gate respectively. When a positive voltage is applied to the gate of an SCR, it will become biased and allow current to flow from anode to cathode without any further control. This is known as forward conduction. Conversely, when a negative voltage is applied to the gate, the SCR will become reverse biased, and not allow current to pass from anode to cathode. This is known as back-to-back conduction.

In the case of the T5070680B4AQ, the anode voltage rating is 700 V and the gate sensitivity is 100V. The T5070680B4AQ has an on-state gate current of 5mA and an off-state gate current of 8mA. In addition, the T5070680B4AQ has a forward peak pulse current rating of 5000 A and a reverse peak pulse current rating of 2000 A. This makes it suitable for many applications that require high-current control.

In conclusion, the T5070680B4AQ is a highly versatile SCR that has numerous applications in various industrial and automotive systems. It can control current in both the forward and reverse direction, making it well suited for applications such as electric heaters, motor speed and direction control, UPS systems, power relay applications and automotive systems. Moreover, the T5070680B4AQ has a high on-state and off-state gate current rating, making it ideal for applications that require high-current control.