2N6403G

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Thyristors - SCRs

Thyristors are devices used in a variety of electronic applications, primarily as switching components. The most common type of thyristor is the SCR (silicon controlled rectifier). These devices allow current to flow in one direction only and can be used to control power levels, convert AC to DC and both store and release energy.

A 2N6403G SCR is a three-terminal device that forms part of a power switch. It is divided into gate, anode, and cathode terminals. The gate terminal can be used to control the switching state of the SCR and both the anode and cathode terminals are connected to the load. 2N6403G SCRs (along with related devices such as the 2N6400 series) are widely used for regulating 80V peak forward current loads in industrial applications.

Application Field

2N6403G SCRs are mainly used in the fields of eleectronic circuit, power control, current controlling and energy release. Applications include electric power switching, lighting control, solar and photovoltaic system control, motor speed control, DC-DC converter efficiency operation, current control, power supply, UPS power control and electric welding apparatus.

Working Principle

The 2N6403G SCR is an electronic component whose primary purpose is to switch a current on or off. To do this, the SCR contains two terminals (anode and cathode) and a gate. When a positive voltage is applied to the gate, it creates a current between the anode and the cathode, allowing current to flow through the circuit. However, when the voltage is removed, the SCR stops conducting. Hence, it acts as a “one-way” switch.

The switching action of the SCR is also referred to as “latching” because once it is turned on, it cannot be turned off until the current is broken. Since it is not affected by the amplitude of the voltage, it can be used to regulate higher currents. The SCR also has a wide range of uses in dimmers and relays, as well as in electric motors, high power switching, and control applications.

Moreover, 2N6403G SCRs can be used in phase control applications, such as controlling the speed of a motor or raising and lowering the dimmer of a bulb. The application of the SCR in phase control is different from its use as a switch. In phase control, the SCR is turned on and off at a fixed frequency, and the amount of time that the SCR is either on or off is controlled by the gate voltage. The gate voltage determines the firing angle, which is the ratio of time that the SCR is on to off. This allows the user to adjust the power level to the load.

Conclusion

The 2N6403G SCR is a type of thyristor widely used in power electronics applications. It is a three-terminal device that can be used to control the switching state of a circuit and regulate current. The 2N6403G SCR can be used for electric power switching, lighting control, motor speed control and current control. It is mainly used for controlling current levels and converting AC to DC, and can also be used for energy storage and release.

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