C395B

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Thyristors - SCRs are a type of semiconductor device with three or four layers of alternating P-type and N-type semiconductor materials. The device operates by introducing a gate voltage to the gate terminal, which is also known as the control terminal. By controlling the gate voltage, it is possible to control the current flowing through the device and, consequently, the power supply. C395B is a type of thyristors - SCRs.

The C395B is a half-controlled thyristor, also known as a silicon controlled rectifier, and it can be used for AC power switching applications. It is a four-layer device, composed of two P-type and two N-type layers. The two P-type layers, known as the anode and cathode, are connected together, while the two N-type layers, known as the gate, are connected to the control terminal. By applying a gate voltage, current can be allowed to flow through the device.

C395B is typically used in power switching applications, such as motor and lamp control. It can be used to turn on and off a motor or a lamp by controlling the voltage applied to the gate terminal. The device can also be used in applications ranging from electronic thermal control to high-temperature furnace control.

The main advantage of C395B is its high current-handling capability and low voltage drop. With its rated current of 35A and its rated voltage of 400V, the device is suitable for a wide range of applications in which a high current-handling capability is needed. In addition, its low voltage drop allows it to be used in applications where a voltage drop of less than 1V is required. Furthermore, the C395B has a low reverse recovery time, which can help reduce thermal losses in AC power switching applications.

The working principle of C395B relies on the principle of a PN junction diode. When the gate terminal is left open, no current can flow through the device. When a positive voltage is applied to the gate terminal, the junction between the two P-type layers, known as the anode and cathode, becomes forward biased, allowing current to flow through the device. The current initially increases, until it reaches its instantaneous peak and then decreases. When the gate voltage is removed, the device blocks the current, and the anode-cathode junction appears again in the reverse biased state, turning the device off.

In conclusion, the C395B is a four-layer half-controlled thyristor, which is typically used in AC power switching applications. It is suitable for a wide range of applications, due to its high current-handling capability and low voltage drop. The device operates on the principle of a PN junction diode. When a positive voltage is applied to the gate terminal, the device is forward biased and allows current to flow. When the gate voltage is removed, the device blocks the current and is turned off.

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