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Thyristors - SCRs - Modules

Thyristors are solid state semiconductor devices that act as switches, allowing current to flow in only one direction. SCR stands for silicon controlled rectifier, and are a type of thyristors with four layers of alternate P-type and N-type semiconductor material connected together.

The F1891DH1000 is a SCR module designed for voltage control applications. It has a maximum continuous current rating of 1000A, with a voltage drop of 1.4V and surge current ratings up to 1500A. The F1891DH1000 features four PN junctions connected in series, providing four terminals to control the device.

Applications

The F1891DH1000 is suitable for high power applications, such as wind power systems, charging systems, motor drives, UPSs, and solar systems. It can be used in voltage control circuits to regulate the power input, or to protect against overvoltage and reduce noise. The module can also be used in phase control circuits to reduce the power consumption by controlling the current through an electric motor.

Working Principle

The F1891DH1000 is based on a four-layer structure with alternated P-type and N-type semiconductor material. The four PN connections form a structure called a diac, which is used to control the gate current. When a small trigger current is applied to the gate terminal, a larger current flows from the anode to the cathode and is controlled by the gate current. The SCR can be turned on or off by controlling the gate current.

The F1891DH1000 module features a reverse blocking protection circuit which prevents the current from flowing in the reverse direction when the module is turned off. This ensures that there is no damage to the module due to any accidental reversing of the supply.

The F1891DH1000 is used to control the power flow in high power applications. It can be used to reduce noise and protect circuits from overvoltage, or to reduce the power consumption of electric motors by controlling the flow of current.

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