2N6399G

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Thyristors - SCRs

Thyristors, or silicon controlled rectifiers (SCRs), are a type of solid-state devices used as switches, voltage and current controllers, and rectifiers. They are basically three-terminal devices composed of two PN-junctions, connected in series. These devices are very effective and reliable, and have been used in a wide variety of applications, including power control and switching, automotive, medical, communications, and industrial applications.

2N6399G Application Field

The 2N6399G is a sensitive gate, single-phase silicon controlled rectifier (SCR). This device features tight gate characteristics with low holding and turn-off current, as well as low on-state voltage and gate current. As such, it is often used for general purpose AC switches, IPMs and control equipment, process and temperature control, as well as various AC and DC motor control applications. It is also ideal for metering applications, as it is stable switching and commutation voltage.

2N6399G Working Principle

The 2N6399G is a four layer PNPN SCR, with a main gate, an auxiliary gate, and two junction gates. The main gate controls the on/off of the device, and can be used for a variety of applications such as those mentioned above. The auxiliary gate is used to turn the device off, and is typically used for applications such as switching AC power from a supply source. The two junction gates, meanwhile, are used to control the on-state voltage and the current flow of the device.

To understand the operation of the 2N6399G, consider the following steps. When no forward voltage is applied, the device is initially in the off-state. When the forward voltage increases to the forward breakover voltage (VBO) at which the device begins to turn on, the main gate becomes forward biased and current flows. This forward current causes the second junction to become forward biased and this current increases the on-state voltage and the current flow. When the voltage drops below the holding current, the device turns off again, and the process is repeated again when another forward voltage is applied.

In addition to being used for general purpose switching and control applications, the 2N6399G can also be used for load current commutation. This is done by using a current control device, such as an SCS, to control the load current. This current is then converted to a voltage by a current transformer and the voltage is then applied to the second junction of the device. When the cut-off voltage is reached, the device is turned off, the load current is reduced, and the device is switched off.

In conclusion, the 2N6399G is a sensitive gate, single-phase silicon controlled rectifier (SCR) device, offering a range of applications. This device is ideal for AC switches, IPMs and control equipment, process and temperature control, as well as various AC and DC motor control applications. It is also well-suited for metering applications due to its stable switching and commutation voltage. Additionally, it can also be used for load current commutation with the help of a current control device.

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