CD431290B

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Thyristors - SCRs - Modules

The CD431290B is a double-pole, 6-pin device featuring two fast-recovery thyristors for use as high current switches. They can be used to switch resistive and inductive circuits from DC to 960 Hz. The forward current remains within the same range regardless of AC or DC application.

It is commonly found in various applications from lighting to industrial applications. The CD431290B thyristors are widely used in battery charging, solar and wind power energy control, LED displays, motor control and other power semiconductor applications.

Application Field of CD431290B

The CD431290B thyristor is widely used in many applications, including:

• DC to AC switching applications
• Alternative Energy Control
• Sensor control
• Motor control
• LED lighting control

Working Principle Of CD431290B

The CD431290B is a symmetrical double-pole, 6-pin thyristor module with two fast-recovery thyristors. The module can be used as a switch for resistive and inductive circuits from DC to 960 Hz. Forward current capability is the same for AC and DC operation.

When the gate voltage exceeds the control voltage (Vg), the thyristor is switched on. The control voltage is the current sensing voltage of the gate circuit of the thyristor. When the output voltage of the thyristor drops to the cathode cutoff voltage (Vk), the thyristor turns off.

When the cathode voltage is less than the gate voltage plus the gate-cathode voltage (Vgk), the thyristor turns on again. Therefore, the module works as a switch to control current in a circuit. Due to its large series resistance, the CD431290B thyristor can keep the output voltage and current constant for a long time. This makes it suitable for applications such as LED lighting.

In conclusion, the CD431290B is a fast-recovery thyristor module with two fast-recovery thyristors in a symmetrical double-pole, 6-pin design. The module can be used as a switch for resistive and inductive circuits from DC to 960 Hz and is suitable for many applications, such as motor control, LED lighting control, alternative energy control, and battery charging.

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