EFD20G Discrete Semiconductor Products

Thyristors are a type of solid state semi-conductor device, which are controlled by current or voltage. They are commonly used to switch and control electric power in an array of applications. One type of thyristor is the Silicon Controlled Rectifier or SCR for short. The EFD20G is an example of an SCR, and is widely used in many applications due to its robust design. This article will explain the application field and working principle of the EFD20G.

Application Field

The EFD20G SCR is a high power device, capable of handling up to 20A of current, making it suited for a range of industrial applications. The most common uses for this device are in high power control systems, in industries such as steel production, electro-plating, ventilation systems, motors, welding, and lighting control. Its robust design makes it an ideal choice for these demanding applications, offering reliable performance and a long service life.

Working Principle

The working principle of an SCR is to act as a switch that can be turned on and off using a small amount of current or voltage. The voltage or current applied to the device is known as the gate current or gate voltage. When a positive voltage or current is applied to the gate of the SCR, it turns on and the current flow through it is amplified above the gate voltage level. This amplified current is known as the “ holding current” and it does not require the ongoing gate voltage or current to remain on. The current can only be switched off if a negative voltage or current is applied to the gate of the SCR; this is known as “commutation”. The EFD20G has an enhanced commutation capability, meaning that it can be switched off quickly, allowing for a higher switching frequency and for the use in applications such as motor control.

Conclusion

The EFD20G SCR is a robust, high power device that is suitable for a wide variety of industrial applications. Its enhanced commutation capability makes it an ideal choice for motor control applications, as well as lighting control, steel production and more. The SCR works by using a small amount of current or voltage to switch it on and off, making it an efficient and reliable solution for a wide range of high power applications.