SD05C.TCT Circuit Protection

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Thyristor Surge Protector (TSP) or Thyristor Surge with Capacitor (TSC) devices available on the market today are an efficient and cost-effective way to protect sensitive electronic equipment against voltage and current spikes. In recent years, this technology has become more sophisticated, with improved design to achieve more reliable and cost-effective solutions in the market. In this article, we will discuss the popular SD05C.TCT application field and working principle.

Overview of TSP and TSC Devices

TSP and TSC devices are both designed to protect electronic systems from damage due to voltage spikes. TSP devices are simpler, only containing one thyristor, while TSC devices contain two thyristors and a capacitance element. The capacitance element provides additional protection against high-frequency transients and reduces response time. TSP and TSC devices are often used to protect against power surges in the form of lightning strikes, as well as EMI and ESD events.

TVS-Diodes

Thyristor Surge Protectors (TSPs) and Thyristor Surge with Capacitors (TSCs) are part of a category of components known as Transient Voltage Suppressors (TVSs). TVSs are both active and passive protection components that are used to protect circuits from electrical transients. TVSs have the ability to “clamp” any high voltage spikes that are received, preventing them from being passed through the circuit. TVSs are usually the last line of defense against electrical transients as they can be destroyed by the voltage spike that they absorb.

SD05C.TCT Application Field and Working Principle

The SD05C.TCT is a TVS-diode which provides over-voltage protection from lightning surge and ESD/EFT pulse events that occur in input power systems. The SD05C.TCT has a very fast response time and can clamp transient voltages up to 350V. The device is capable of absorbing up to 10kA peak surge pulse current. It can operate in temperatures between -40℃ to 125℃.

The SD05C.TCT works on the principle of a thyristor switching device. When a voltage surge is detected, an internal thyristor is activated, redirecting the surge current to its D3/D4 terminals and away from the protected circuit. When the surge is concluded, the suppressed voltage is reduced to the normal operating value and the thyristor is reset to the off state. Therefore, the SD05C.TCT is able to effectively protect the circuit from transient voltage events while still allowing normal power operation.

The SD05C.TCT is typically used in a wide variety of applications, such as digital TV receivers, smartphones, computers, LCD displays, and other sensitive electronic equipment. It is suitable for automobile, aerospace and military applications. With its fast response time, excellent surge current handling and low threshold voltage, the SD05C.TCT is a reliable and cost-effective solution to protect against over-voltage transients.

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