1N4558B

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

1N4558B is one of the most popular zener diodes available in the market. It is a single diode with an operating current between 50 and 500mA and a maximum power dissipation of 500mW. It is most commonly used to provide overvoltage protection for systems that require a stable voltage source. The 1N4558B diode is available in a variety of package styles for ease of use.

1N4558B Application Field

The 1N4558B is most often used in applications that require a stable voltage source, such as overvoltage protection. Overvoltage protection is used to protect sensitive equipment from potentially damaging voltage spikes or surges. The 1N4558B is also used in circuit clamping and DC power supplies. In addition, its wide variety of package styles makes it an attractive diode for prototyping.

1N4558B Working Principle

The 1N4558B works by creating an avalanche breakdown when a certain voltage is exceeded. This is the reason the 1N4558B is known as a "Zener Diode." As voltage is applied to the 1N4558B, the current flows through it until the voltage reaches a certain "knee" point. At this point, the current rises rapidly, resulting in the avalanche breakdown. This phenomenon causes the voltage to regulate at a constant level, which is known as Zener Voltage. The Zener Voltage of the 1N4558B is 5.1 volts.

Once the voltage reaches the Zener Voltage, the current passes through the diode, resulting in a constant voltage output when the input voltage is higher than the Zener Voltage. The current then passes through to the output, bypassing the input voltage. This allows the 1N4558B to act as an overvoltage protection device.

The 1N4558B also has an internal resistance of 5 to 10 ohms. This internal resistance is necessary to prevent the current from flowing unchecked and causing potentially damaging voltage surges. It also helps to regulate the Zener Voltage for a more stable output.

Conclusion

The 1N4558B is a single zener diode that is primarily used for overvoltage protection. It is available in a variety of package styles and has an operating current of between 50 and 500mA and a maximum power dissipation of 500mW. It is most commonly used to provide overvoltage protection for systems that require a stable voltage source. The 1N4558B works by creating an avalanche breakdown when a certain voltage is exceeded, resulting in a stable voltage output when the input voltage is higher than the Zener Voltage.

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