VS-VSKT105/04

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Thyristors, which are also known as Silicon Controlled Rectifiers (SCRs), are special types of semi-conductors that can only be triggered into the “on” state when a certain voltage threshold is reached. They are essentially a means of controlling the flow of electricity in alternating current (AC) circuits, and are widely used in applications such as dimming lights and regulating motor speed. A thyristor module is an integrated circuit comprising one or more thyristors, which can be used to offer greater control over the current flow in a circuit.

The VS-VSKT105/04 thyristor module is designed to offer greater versatility in AC applications. It is ideal for applications such as controlling motor speed, lighting dimming and energy-saving, as well as providing surge protection, thanks to its improved surge withstand capability. The VS-VSKT105/04 is equipped with an isolated plastic base, which has been designed to withstand high temperatures up to 105°C.

The VS-VSKT105/04 features high isolation voltage of 3,500V AC, an on-state forward current of 120A, and a leakage current of 2 mA. It also offers a high di/dt of 50A/μs and a high dv/dt of 4.8V/μs, both of which ensure high reliability in operations. In addition, it is designed to operate at high temperatures of up to 150°C, making it suitable for use in harsh environments.

In order to fully understand the working principle of the VS-VSKT105/04, it is worthwhile to take a closer look at the internal circuitry of the module. The module features two SCRs connected in inverse parallel, as well as two capacitive elements connected in a series. This ensures that when triggered, the circuit will allow a current to flow from the anode of the SCR to the cathode of the SCR, thus controlling the direction and amount of current flowing through the circuit. The capacitive elements are used to prevent any voltage spikes in the circuit.

In order to trigger the circuit, a triggering voltage of 10V is required. This is supplied either externally, via a resistor, or internally, through a surge voltage waveform. Once triggered, the SCRs will remain “on” until either the voltage drops below a certain threshold, or the switch is opened. This makes the VS-VSKT105/04 perfect for applications where accuracy and control is key, such as home appliance automation, dimming control and surge protection.

The VS-VSKT105/04 is a versatile and reliable thyristor module, which is perfectly suited to a range of AC applications where a high degree of control and accuracy is required. Thanks to its two-phase inverter circuit and integrated SCRs, it provides reliable operation in demanding environments, and its high di/dt and dv/dt ensure that it can cope with varying current and voltage levels. It is easy to see why the VS-VSKT105/04 is such a popular choice for engineers and electronics professionals.

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