CD431890C

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Thyristors are three or four layered semiconductor devices made up of either silicon or selenium. The simplest type of thyristor is the SCR (silicon controlled rectifier), which can act as a switch, allowing current to flow through it when a voltage is applied to its control electrode. The CD431890C is a three phase SCR module, commonly used in AC power applications. It allows precise control over the input power and is capable of withstanding high temperatures.

The CD431890C is a phase controlled SCR module with three standard SCRs housed in a single package. Each SCR is designed to turn on when a specific phase voltage exceeds a certain threshold voltage. This allows the CD431890C to control the current by accurately controlling the phase angle of the input power.

The CD431890C includes two important components: the SCR and the Trigger Circuit. The SCR is a three phase rectifier consisting of three interconnected silicon devices. When voltage is applied, the SCR acts as an on/off switch, allowing the current to flow in only one direction. The Trigger Circuit provides control over the on/off switching of the SCR by controlling the voltage applied to the SCR\'s control electrode.

The CD431890C is commonly used for motor control applications, such as motor speed control, current limit protection and surge currents. It can also be used to control heaters and other resistive loads. Due to its unique design, the CD431890C can be used in both AC and DC applications.

The working principle of the CD431890C is quite simple. When voltage is applied to its control electrode, the Trigger Circuit triggers the SCR, which allows current to flow through it. The amount of current is controlled by the phase angle of the input power, and this can be adjusted by varying the voltage applied to the control electrode. The design of the CD431890C ensures that the SCR is always in the off state when the input power is below the threshold voltage. This allows the module to provide precise control over the power supply, making it an ideal solution for applications such as motor control and heaters.

In conclusion, the CD431890C is a three phase SCR module that is used in AC and DC applications to provide precise control over the input power. It consists of three interconnected SCRs and a Trigger Circuit, which trigger the SCR when a voltage is applied to its control electrode. This allows the module to control the input power by accurately controlling the phase angle, making it an ideal solution for applications such as motor control and heaters.

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