MMBZ5239B-G3-18

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MMBZ5239B-G3-18 Application Field and Working Principle

MMBZ5239B-G3-18 is a single Zener Diode with a higher reverse breakdown voltage of 18 volts. It is part of a family of Zener Diode products by Microsemi, each of which is designed to be used in different applications. They offer reliable and efficient operation, even in harsh environments.

Application Field

The MMBZ5239B-G3-18 Zener Diode is mainly used in applications that require high stability, such as voltage regulation, voltage regulation circuits, voltage stabilizers, and voltage protection circuits. It can also be used in electronic power supplies, lighting, display systems, and general electronic circuits. This diode can also be used for the reverse polarity protection and the clamping of transient voltages.

Working Principle

The MMBZ5239B-G3-18 Zener Diode works by allowing current to travel in only one direction, from the anode to the cathode. When an external voltage from the anode is applied to the cathode, it causes the Zener diode to break down and reduce the voltage to its specified level. This breakdown of the diode is called the breakdown voltage, or zener voltage. This voltage level is constant regardless of the level of current entering the diode. This allows the diode to be used to maintain a stable voltage output, even in the presence of sudden current surges.

When the voltage in the external circuit drops below the breakdown voltage of the Zener, the current flow is interrupted, and the diode acts as an open switch. When the external voltage rises back above the breakdown voltage of the Zener, the current flow resumes.

In applications where high power and current are needed, the breakdown voltage of a single Zener diode can be increased by connecting them in series or parallel. This allows the diode to regulate higher voltage and current levels and enables the device to be used in applications such as lighting, display systems, and general electronic circuits.

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