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Diodes - Zener - Single

The BZX55F20-TAP is a single, low-voltage Zener diode suitable for use in a wide range of applications. It is used in parallel with a series resistor, to provide a steady, current-limiting voltage reference. The series resistor helps to prevent any destructive current spike that could be caused by voltage differences between the Zener diode\'s junction and the reference voltage.

Application Field

The BZX55F20-TAP is used in various applications. It can be used to regulate and control current flow in circuits containing LEDs, as well as for limiting or filtering back-EMF transients. BZX55F20-TAPs are also used in many audio applications, such as amplifiers and speaker dividers.

In other applications, BZX55F20-TAPs are used for voltage regulation. For example, they can be used to protect sensitive circuits from overvoltage, or to provide a steady, regulated output voltage to power devices such as computers, tablets and mobile phones.

Working Principle

The BZX55F20-TAP consists of a single PN junction diode connected in reverse. In this configuration, the diode behaves as a Zener diode, allowing a certain voltage (in this case 20V) to pass in reverse across the diode. Any increase in voltage beyond the rated 20V will result in a corresponding increase in current, until the desired voltage is reached. This is useful in applications where a steady, current-limiting voltage reference is required, such as in LED circuits.

The BZX55F20-TAP diode also displays a negative temperature coefficient, meaning that as the diode temperature increases, its Zener voltage decreases. This can be used to provide protection from excess currents due to temperature changes.

The BZX55F20-TAP has a maximum rated power dissipation of 500mW, enabling it to handle currents up to 2A without exceeding its rated power capacity. This makes it suitable for use in a variety of current-limiting circuits.

Conclusion

The BZX55F20-TAP is a single, low-voltage Zener diode suitable for use in a wide range of applications. Its maximum rated power dissipation of 500mW makes it suitable for use in current-limiting circuits, and it displays a negative temperature coefficient, allowing it to provide protection from excess currents due to temperature changes. The BZX55F20-TAP is used in various applications, such as LED circuits, audio applications, and voltage regulation.

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