VS-ST083S12PFK1

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Thyristors - SCRs

A silicon controlled rectifier or semiconductor-controlled rectifier (SCR) is a four-layer solid-state current-control device. As a member of thyristors family, the SCR is one of the two most widely used members, the other being the triac. These devices enable power control of AC current applications, such as motor controls, lighting controls, welding, rectifier circuits and a variety of other applications.The VS-ST083S12PFK1 is a type of three-terminal silicon controlled rectifier (SCR). It has a blocked voltage of 800 volts, a hold current of 130mA, a gate trigger current of 5mA and the maximum off-state current of 100℃ at 8mA. The main features of VS-ST083S12PFK1 are that it can be triggered using a variety of circuit types, including a resistive gate triggering circuit and a positive gate-bias triggering circuit.The primary application of the VS-ST083S12PFK1 is in AC motor control circuits, which use SCR devices to supply power to the motor when it is needed. The device is also used in switched-mode power supplies, for electrical power control, as well as for lighting control and welding.The VS-ST083S12PFK1 consists of a pair of p-type and n-type semiconductor materials connected together in a diode bridge formation, with a gate electrode connected in parallel to the bridge. When the device is off, no current flows through the gate electrode, so the p-side and the n-side of the diode bridge are shorted. When an external trigger signal is applied to the gate electrode, the SCR turns on, allowing current to flow between the p-side and the n-side of the diode bridge.The working principle of the VS-ST083S12PFK1 is simple. When a signal is applied to the gate electrode, the p-n junction of the device is forward-biased and the current flows through the SCR. The amount of current allowed to flow through the SCR is dependent upon the amount of signal applied to the gate. Once the SCR has been triggered, the SCR will stay in the on-state until the power supply is disconnected, the load current falls below the minimum holding current, or the reverse-bias voltage applied to the gate is large enough to break down the p-n junction of the device.The SCR can be used as a one-way switch, allowing current to flow through it when activated. By applying an external signal to the gate, current is allowed to flow through the SCR, thus effectively turning the load on and supplying power to the load. This feature of the SCR makes it ideal for use in AC motor control circuits, as it allows for precise control over the amount of current supplied to the motor.In summary, the VS-ST083S12PFK1 is a three-terminal, silicon controlled rectifier with blocked voltage of 800 volts, hold current of 130mA, gate trigger current of 5mA, and maximum off-state current of 100℃ at 8mA. It is mainly used in AC motor control circuits, switched-mode power supplies and lighting control, due to its ability to easily switch on or off with an external signal.

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