ACZRA4745-HF

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Diodes - Zener - Single

The ACZRA4745-HF diode is a type of Zener diode, single device with a peak power rating of 47 W and a zener voltage of 4.7 V. It is particularly useful as a breakdown device in more complex circuits and as a voltage regulator.Zener diodes are basically standard diodes with a much higher breakdown voltage. A Zener diode has a reverse breakdown voltage that can be precisely specified, so the diodes are used to limit the voltage applied to sensitive components.The working principle of the ACZRA4745-HF Zener diode is basic. When the diode is connected in the reverse direction in a circuit, a slight current passes through the diode, causing a voltage drop across the diode’s P-N junction. This voltage drop is known as the “Zener Voltage.” When the voltage of the circuit exceeds the Zener Voltage, the diode begins to conduct heavily and the excess current passes through the diode. This clamping action prevents too much voltage from reaching sensitive parts of the circuit.

The ACZRA4745-HF diode finds application in a variety of circuit designs, ranging from simple voltage regulator to more complex applications, protected power supplies and signals-level restoration. It can be used to protect circuits from power surges, to limit the voltage applied to sensitive components and to act as a reference voltage. It can also be used in regulating the output voltage of switching power supplies, motor controls, and telecommunications.

A Zener diode not only holds the voltage applied to the circuit but also exerts control over the voltage. The resulting voltage control is known as “clamping“. The ACZRA4745-HF operates in the clamping mode and is most useful when used for voltage limiter and voltage regulator applications. The voltage drop across the diode increases as the current increases. When the power to the circuit is cut off, the current is nearly zero, causing the Zener diode to go into the non-conducting state.

The ACZRA4745-HF is designed to operate in the most extreme temperature conditions. It can handle operational temperatures from -55 to 125 °C, with a maximum reverse surge current of 4.9 A. It is suitable for use in military and aviation specifications such as MIL-STD-202, IEC and ECSS requirements.

The ACZRA4745-HF is a reliable and cost-effective solution for voltage limiting and voltage regulation in a variety of applications. By preventing voltage overshoot or undershoot, it can protect circuits from damage and provide a regulated supply of power. The wide temperature rating provides excellent performance in extreme conditions and ensures the reliability of the circuit. The fact that the ACZRA4745-HF diode is available in a variety of packages for easy mounting further make it a preferred choice for applications in various fields.

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