2N689A

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 (Silicon Controlled Rectifiers) are broadly used electronically-controlled switches that can be used to both switch on and off a circuit. In particular, 2N689A is one of the most common types of SCRs, which is suitable for a wide range of applications and is available on the market. This article will explore the 2N689A application field and its working principle in detail.

2N689A Application Field

2N689A has been designed for a wide range of applications, from consumer goods to industrial automation projects. In consumer market, 2N689A usually works as an electronically-controlled switch in various home appliances, such as microwave ovens, televisions, washing machines, ovens and lighting system. For industrial applications, 2N689A is often used in motor control, vibration control, pulse generators, temperature control, power converters, and power factor correction, among other uses.

In addition to consumer and industrial applications, 2N689A is also used in numerous medical equipment and vehicles. For example, it is used in medical MRI scanners, CT scanners, patient lifts and wheelchair lifts. In automotive industry, 2N689A is commonly used in ABS brakes and electronic fuel injection systems.

2N689A Working Principle

2N689A SCR is composed of four alternating N and P type semiconductor materials. The P layers are connected to the positive lead, while the N layers are connected to the negative lead. The two junctions between adjacent N-type and P-type layers are called anode and cathode, respectively.When the SCR is activated, current start to flow between the anode and cathode, and the gate voltage (or gate current) will provide the necessary voltage to break the temperature-dependent depletion region around the gate and cathode junction.

In normal operation, when the anode voltage increases above the breakdown voltage (BV) of the SCR, the current starts to flow from the anode to the cathode. The current then maintains a relatively constant value and the device is said to have "latched". This technique is used to protect other components from high voltage or current beyond its limit. Once the anode voltage falls below BV, the device will turn off and release the current flow.

Conclusion

In conclusion, 2N689A SCR has a wide range of applications in consumer goods, automotive, medical, and industrial areas. Its working principle is based on the temperature-dependent breakdown voltage which break the depletion region at the anode and cathode junction, allowing current to flow between the two terminals. As such, 2N689A can be used to provide reliable current control and protection function in various electronic circuits and systems.

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