ACZRA4739-HF

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Diodes - Zener - Single

The ACZRA4739-HF is a single Zener diode, which is a heavily doped semiconductor with an extremely high reverse breakdown voltage. It is designed to provide a low-level current via a reverse-biased (opposite to the highest forward-bias voltage) layer of doped semiconductor material, which allows the device to break down and flow electrons from the Cathode to the Anode. This current is used to prevent any damage caused by excess voltage, and is controlled by a built-in Zener voltage.

The ACZRA4739-HF is a low-power Zener diode, rated up to 40V and capable of conducting up to 350 mA of forward current. It is specifically designed for applications that require protection from excessive voltages or unwanted signals in general, such as DC motors and the associated circuits, converters and power supplies.

Overall, the ACZRA4739-HF can be used in numerous applications, such as: electrical appliances, automotive electronics, power supplies, computers, industrial and consumer electronics.

Working Principle

The working principle of a Zener diode is simple and straightforward. A forward-biased diode allows current to pass through it, while a reverse-biased diode blocks the current. However, if the voltage is increased beyond a certain limit (called the Zener Voltage), the diode suddenly “breaks down” or “conducts” in the opposite direction (toward the anode), allowing current to flow from the cathode to the anode. This current is known as a Zener current.

The current is limited by the internal resistance of the diode and by the capacitance of the device, ensuring a predictable and stable current flow. Zener diodes are used to protect circuits from high voltages and reduce the stress on particular components otherwise caused by them.

Application Fields

The ACZRA4739-HF Zener diode can be used in a wide range of applications due to its low-power characteristics, high voltage and current handling capabilities. It is an ideal choice for the protection of sensitive components in circuits such as DC motors, automotive electronics, power supplies, computers and consumer electronics. Furthermore, it can provide safe and stable protection against overvoltages, transients and spikes in circuits ranging from low-power, such as optical-disc drives, to high-power, such as solar-powered applications.

The ACZRA4739-HF is also ideal for use in industrial power supplies, as it provides reliable protection against any transient or electrical fault that may occur. In addition, the diode works great in audio applications, as it prevents any unwanted or excessive signals from damaging sensitive components.

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