BZX55B20-TR

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Background

A BZX55B20-TR is a Zener diode that is specifically designed for use in voltage regulation and stabilization circuits. Zener diodes are used to regulate and maintain specific voltage levels and current outputs, even as the power supply\'s voltage changes, enabling the component to be used in a range of applications.

Application Field

BZX55B20-TR can be used in a variety of fields where it is necessary to maintain constant voltage levels. This includes the following fields, among others:

• Electronic circuits
• Computer technology
• Communication systems
• Voltage regulators
• Low-noise and low-dropout power supplies
• High-frequency switching applications
• Audio systems
• Timekeeping systems
• Automotive applications

The BZX55B20-TR has found widespread use in a variety of industrial applications, including power conditioning, voltage regulation, and overvoltage protection.

Working Principle

BZX55B20-TR works by monitoring the voltage supply and ensuring that the current flowing through it remains at a constant level, regardless of changes in the input voltage. This is achieved by utilizing a precisely designed semiconductor junction that allows current to flow in one direction, while simultaneously restricting current flow in the opposite direction when a certain voltage is exceeded.

The diode allows current to flow in the forward direction without any limitation. However, when the voltage across the junction reaches a certain point called the “Zener voltage”, the flow of current from the junction is restricted—this is the “Zener effect”. The reversal of current flow is then allowed to continue until the voltage across the junction drops back to the initial level, and consequently, the current flow resumes its natural path.

The BZX55B20-TR is well-suited for applications operating in the 500mV to 21V range, as it can maintain a precise voltage output within this voltage range, and offers high surge current handling capability.

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