MMBZ5239B-7

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

MMBZ5239B-7 is a diode type of Zener Single. It is a two-terminal device with a sense connection, whose operating principle relies on the electrical property of forward voltage and current.

Overview

The MMBZ5239B-7 is a low voltage Zener diode with a Zener voltage of 7.5 V, a zero-temperature coefficient, and a maximum working power of 500 mW at an ambient temperature of <5 °C to 125 °C. It is packaged in the standard SOT-23 case and has a total width of 2.75 mm and total height of 2.4 mm.

It offers low leakage current and operates with a maximum current of 5 mA. The maximum frequency of its breakdown voltage is 300 kHz, and its maximum avalanche power dissipation is 5.6W. This device has a forward voltage of 1V at 1A current.

Application Fields

The MMBZ5239B-7 is mainly used in :

• Automotive lighting systems
• Battery backup systems
• LCD displays
• Point of Load (POL) converters
• Regulated power supplies
• Telecommunications systems

Working Principle

The working principle of MMBZ5239B-7 is based on the breakdown voltage ‘Vz’, which is the voltage at which the electrical current starts to flow inside the device. It is generally expressed in voltages and depends upon the particular Zener diode being used.

When the voltage across the diode is below the Zener voltage, it behaves just like an ordinary diode and functions as a rectifier. It allows the current to flow in only one direction, while blocking the other direction. But when the voltage across the diode reaches the Zener voltage, it begins to break down and acts as a conductor, allowing the current to flow in both the directions.

This flow of current causes two physical changes to take place. The first is the voltage across the diode becoming constant, which is the Zener voltage itself. The second is a dramatic increase in the current flowing through the diode, which happens because as the resistance of the diode increases, the current through it increases as well.

The MMBZ5239B-7 is an ideal choice for achieving a low power, high efficiency power supply due its low leakage current, reverse breakdown voltage, and low impedance at high frequencies. In addition, its low forward voltage and wide operating temperature range make it well suited for various automotive, consumer and industrial applications.

The specific data is subject to PDF, and the above content is for reference