BZT52B11-E3-18

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The BZT52B11-E3-18 Zener diode is a type of single diode with a breakdown voltage of 18V and a maximum power rating of 250mW. It is typically used in applications that require a low voltage drop and a voltage-stabilizing diode.

What is a Zener Diode?

A Zener diode is a special type of diode that uses an intrinsic breakdown voltage, the so-called ‘Zener voltage’. It’s used for a variety of voltage stabilizing and voltage-regulating applications. It also has a reverse voltage breakdown characteristic, where the voltage levels that cause breakdown are very predictable and consistent.

Applications of BZT52B11-E3-18

The BZT52B11-E3-18 is a Zener diode that is primarily used in applications that require low voltage drops and stabilization of small voltage fluctuations. These fluctuations often occur in electrical and electronic equipment, and the diode provides protection against electrical shock or damage caused by these fluctuations. It is also used as a reference voltage generator or as a voltage regulator.

It can be used as an overvoltage position in switching power supplies, voltage regulators, voltage dividers, and transient absorbers. It is also commonly used to protect integrated circuits from high transient voltages, especially in devices such as laser diodes, optocouplers, and other optoelectronic components.

Working Principle

The working principle of a Zener diode is based on the physical phenomenon of reverse breakdown. When the reverse bias voltage is applied to a diode or junction, it creates an electric field that causes the electrons in the depletion region of the device to become excited to an energy level at which they can \'break\' through the natural barrier between the p-type and n-type material. This allows more current to flow through the junction, and results in a significant drop in the voltage.

In the case of the BZT52B11-E3-18 diode, it has a Zener voltage of 18V. When this voltage is exceeded, the diode will experience a breakdown and a large amount of current can suddenly flow through the device. This current will be drawn from the source, causing the voltage to drop to the Zener voltage.

The Zener diode can be used in a variety of voltage-regulating circuits, such as in shunt regulation or series regulation. In shunt regulation, the Zener diode is connected in parallel with the load and forms a low-impedance shunt circuit. The voltage across the diode is clamped to the Zener voltage and any excess current is diverted to ground. In series regulation, the Zener diode is connected in series with the load and is used to control the current flow through the load.

Conclusion

The BZT52B11-E3-18 diode is a high-performance, low-dropout Zener diode. It is used in a wide variety of applications, including voltage stabilizing and voltage-regulating circuits, overvoltage protection circuits, voltage reference generators, and voltage dividers. It is a reliable, cost-effective solution for protecting against electrical shock or damage caused by electrical and electronic equipment from small unstable voltage fluctuations, and from high transient voltages.

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