TVA190RSA-L Circuit Protection

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TVS - Thyristors

A TVS or Thyristor is a type of thyristor, or solid state switch, that can be used to control the flow of an electrical current between two terminals. The TVS device is often used as a protective element to prevent the damage of connected components due to excessive current or voltage. The general principle of a Thyristor is that a voltage applied to the device increases the current flowing through it until the device turns on and full current can flow. The current then decreases until the device turns off, and the current is again impeded.

The TVA190RSA-L is a specializing thyristor used in a variety of applications, such as mobile phone chargers, computer power supply units, and photovoltaic systems. It is a low-cost, reliable, and easy to use device that can help protect sensitive electrical and electronic components from damage due to over-voltage or current overloads.

TVA190RSA-L Application Field

The TVA190RSA-L can be used in a variety of applications, ranging from consumer electronics to industrial systems. These applications include:

• Consumer Electronics: TVA190RSA-L can be used in mobile phone chargers, home security systems, computers, CD players, digital cameras, and other small electronics.
• Industrial: TVA190RSA-L can be used in industrial controllers, motor drives, UPS systems, pump controllers, and process automation applications. It can also be used in factory and automation systems, where its high surge capacity helps to protect machinery components from surges or overloads.
• Photovoltaic Systems: The TVA190RSA-L can be used in photovoltaic systems to protect the electronic components from over-voltage or current overloads.

TVA190RSA-L Working Principle

The TVA190RSA-L is designed to provide over-voltage and overcurrent protection for a variety of applications. Its working principle is based on the use of a thyristor, which begins conducting with the application of a negative voltage on its gate terminal. The current then enters the device and increases until it reaches its peak. As the current increases, it heats up the Thyristor and when the device reaches its trigger voltage, it "switches on" and allows the full current to flow through the Thyristor. This allows the current to flow from the source to the load with minimal voltage drop.

The Thyristor then monitors the current flowing through the device, and if the current rises above its rated maximum, the device will trip to prevent damage to the connected components. Once the current drops below its rated maximum, the device will reset itself and allow operations to resume.

The TVA190RSA-L is designed to protect the load from short circuit and overcurrent conditions. It also provides protection from over-voltage and load shedding. Additionally, the device has built-in over-temperature protection, which will cause it to trip if the ambient temperature rises above a certain threshold to protect the connected components from temperature-induced damage.

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