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Thyristors – SCRs – Modules: VHF36-08IO5 Application Field and Working Principle

Thyristors, commonly known as SCRs, are four-layered solid-state semiconductor devices that control electrical devices. As a type of power switch, SCRs can start, stop, control, and adjust the intensity of AC currents and voltages. They can also be used to create a phase control or unidirectional current control circuit. They are formed from two P-type material semiconductors and two N-type material semiconductors, three of these layers being sandwiched together between two connecting plates.

The VHF36-08IO5 is an advanced, highly reliable, miniaturized, high temperature, and high-power SCR module designed for use in industrial, commercial, and military applications. This particular SCR module is designed to be used in applications such as power switching, rectification, and inversion. Compared to conventional SCRs, the VHF36-08IO5 offers much higher efficiency and a longer lifetime due to its advanced design.

The module is rated for a maximum repetitive peak off-state voltage of 800 volts and a maximum repetitive peak gate current of 5 amps. The highest ratings for its DC blocking voltage, maximum gate trigger voltage and current, and total power are also 800 volts, 4 volts, and 350 watts, respectively. It also has a maximum gate charge of 10 mC, an R-on of 2.4 mΩ, an L-on of 220 μH, and an insulation voltage of 500 volts.

In order to properly operate the module, the gate trigger voltage must always be lower than the peak voltage of the AC input. When the gate trigger voltage is applied, the SCR module will turn on and allow the AC current to flow, which then passes through the diode rectifier. This process is then repeated when the alternating current reverses its direction.

The module can also be used as an inverter, which is when the AC current is switched inversely, causing the current to flow in the opposite direction. This is achieved by using two separate oppositely connected SCR modules, which are then connected to a common gate trigger circuit. This will allow the gate trigger to switch polarity, allowing the current to reverse direction in each module.

The module can also be used in a phase control circuit in order to control the intensity of the AC current. This is achieved by switching the current on and off at certain intervals, which causes the current to become weaker and stronger. This can be done by connecting the module to a trigger voltage, which will turn the SCR module on and off depending on the voltage amplitude.

The VHF36-08IO5 is capable of operating in temperatures up to 125° C and is ideal for high-power applications due to its powerful ratings and high efficiency. This makes it well-suited for applications that require reliable performance in high-temperature environments, such as those found in industrial, commercial, and military applications.

In conclusion, the VHF36-08IO5 is a highly advanced SCR module capable of withstanding temperatures up to 125°C. It is designed for switching and phase control applications, offering a wide range of ratings including a maximum repetitive peak off-state voltage of 800 volts, a maximum repetitive peak gate current of 5 amps, and a maximum gate trigger voltage of 4 volts. Furthermore, it can also be used in inverter and phase control applications, allowing it to be used in a variety of industrial, commercial, and military applications.

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