P3403AB69 Circuit Protection

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 are efficient electronic components used in various applications including lighting, heating, welding, and motor control. The P3403AB69 is a powerful bidirectional Thyristor that has found a wide variety of applications due to its versatile operating features. This article examines the P3403AB69s application range and also considers its underlying working principle.

Application Field

The P3403AB69 Thyristor is designed for use in high current, low voltage applications. It is ideal for use in power supply circuits, electric welding machines, lighting, and motor control applications. It is capable of controlling alternating current as well as direct current. It is commonly found in applications that require heavy load switching, such as switchgear, relays, and motor control.

Working Principle

The P3403AB69 utilizes a four-layer structure. It is composed of a P-type base region sandwiched between N-type emitter and collector regions. When a positive voltage is applied across the emitter and collector regions of the P3403AB69, the base region becomes reverse biased and electrons are injected into the base. This causes the P3403AB69 to enter its ON state in which it conducts current between the emitter and collector regions.

When the current reaches the holding current, the P3403AB69 switches back into the OFF state. This is caused by the depletion of electrons from the base region due to the recombination of injected rarified electrons with holes created in the base region.

The P3403AB69’s bidirectionality means it can operate in both the forward and reverse direction. In the forward direction, the P3403AB69 can be used to regulate the current between the emitter and collector regions. In the reverse direction, the P3403AB69 is used to protect circuits from transient voltage spikes.

Conclusion

The P3403AB69 Thyristor is a powerful and versatile bidirectional component used in wide variety of applications including lighting, heating, welding, and motor control. It is used in applications that require heavy load switching, allowing it to control both alternating current and direct current. The P3403AB69 relies on a unique four-layer structure that enables it to switch between the ON and OFF states, allowing it to regulate the current as well as protect circuits from transient voltage spikes.

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