CDZT2RA3.9B

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Diodes - Zener - Single

CDZT2RA3.9B is a single zener diode. It is used in applications that require low regulating voltage. Typical voltage regulating applications include low-voltage power supplies, electrical bypassing and clamping. When reverse biased, the device operates in a breakdown mode, wherein a relatively low barrier voltage is required to achieve breakdown.

Application Field

The primary application for the device is for voltage protection and auto-regulation in applications where the voltage needs to be strict and/or clamped from exceeding a certain limit. Its small package size and good electrical characteristics make it well-suited for use in circuit designs where space, cost, and EMI performance are an issue.

Working Principle

The working principle of zener diode is based on an avalanche breakdown mechanism. PCA zener diodes operate in the avalanche breakdown mode. A zener diode is reverse biased allowing a small current to pass through it. As the reverse bias voltage is increased, the electric field across the junction of the diode intensifies and eventually reaches the point of breakdown. As the voltage further increases, the current through the diode sharply increases. Consequently, the diode regulator acts as a voltage limiting device, preventing the voltage from exceeding a certain level. Zener diodes have multiple applications in electrical and electronics because of their voltage regulating capabilities.

Advantages

The major advantage of using a zener diode over other voltage regulation devices is its low cost. Low cost also leads to a smaller package size as compared to conventional voltage regulation devices. Due to their small size and low cost, zener diode regulators can be used for a variety of applications including fault protection, low voltage power supplies, and audio/video amplification.

The greatest advantage of zener diodes is their ability to limit maximum voltage without the requirement of active components that require external power supplies or require user intervention for operation. The diode is inactive until the voltage needs to be regulated, which is beneficial for fault protection.

Conclusion

Diodes - Zener - Single CDZT2RA3.9B is a single zener diode used in applications that require low regulating voltage. It is ideal for low-voltage power supplies, electrical bypassing and clamping. The advantages, such as low cost and small package size, make it well-suited for use in circuit designs. Working under the avalanche breakdown mode, the device can prevent the voltage from exceeding a certain level, ensuring the reliability and stability of the circuit.

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