BZT52C20-E3-18

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The BZT52C20-E3-18 is a single zener diode with two functions. It is used for voltage regulation and for overvoltage protection. In essence, it limits the amount of power available in an electronic circuit and provides stability and protection against sudden transients.

The BZT52C20-E3-18 generally has a forward breakover voltage of 18 volts; this is the voltage at which it begins to conduct in the forward direction. The reverse-breakover voltage is much lower, typically around 1.3 volts. The zener voltage of the diode is determined by its operating temperature, the reverse current, and the value of the series resistance, a parameter which affects both the forward and reverse breakover voltages.

Generally, the forward voltage drop of a diode is relatively constant and independent of the current; for the BZT52C20-E3-18, it is typically around 0.35 volts. The reverse current, however, increases with the zener and/or series resistance, and as the device\'s power rating. Also, as the temperature increases, the breakdown voltage of the diode decreases.

The BZT52C20-E3-18 has a wide range of applications, most notably in voltage regulation and overvoltage protection circuits. In voltage regulation applications, the diode is used to provide a constant voltage output across a load. This is achieved by setting the breakover voltage of the diode above the desired output voltage. The current flowing through the load then adjusts to maintain a constant voltage across the load, regardless of changes in the input voltage.

For applications in overvoltage protection, the diode is set with a breakover voltage above the maximum expected operation voltage of the circuit. The diode then conducts when an input voltage exceeds the set breakover voltage, rapidly reducing the voltage across the protected circuit. This is especially useful for protecting sensitive electronics that cannot handle voltages higher than their specified ratings.

The BZT52C20-E3-18 is a versatile and reliable single zener diode and is used in a wide range of applications for voltage regulation and overvoltage protection. It has a wide forward breakover voltage range (1.3 - 18 V) and a robust construction, allowing it to withstand high currents and voltages. In addition, it is relatively easy to set with the right breakover voltage, making it a great choice for numerous applications.

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