BZX384B20-HE3-18

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The BZX384B20-HE3-18 diodes are a type of Zener diode designed to protect electronic devices against variations in voltage. It provides a flat low-impedance current path which allows the device to react to overvoltage conditions with precision and speed. The device can be used in many different applications including protecting electrical wiring from damage caused by transient overvoltage spikes or lightning, regulating voltage levels, protecting low voltage control circuits from high voltage signals, radio frequency interference filtering, temperature stability and protection of power supplies.

The BZX384B20-HE3-18 Zener diode is a single diode with a blocking voltage of 20volts. It has an operating temperature range from -65°C to +150°C and a power dissipation of 300mW. The device also has a connection tab for easy installation and an LED to indicate overvoltage protection. Additionally, the Zener diode features built-in ESD protection.

The BZX384B20-HE3-18 diodes work by allowing a regulated voltage to pass while blocking and dissipating all voltages above the specified level. This process is known as Zener breakdown, and it helps to minimize the amount of overvoltage that is able to reach the device\'s sensitive components. In order to reach the desired breakdown voltage, the diode must be reverse biased. When reverse biasing the Zener diode, it allows electrons to freely move across its PN junction.

The voltage appearing across the Zener diode, known as the Zener voltage, is dependent on the device\'s Zener impedance. Zener impedance is the device\'s investment in the power consumed when a known voltage is applied to it. The voltage across the diode is a fixed value and is determined by its threshold voltage on the order of magnitude. The higher the Zener voltage, the higher the Zener impedance.

In order to ensure that the diode is able to provide accurate control of the voltage, the device must be connected in a series with a current limiting resistor. This resistor helps to limit the current that flows through the diode when the device is reverse biased. Additionally, this resistor also helps to limit fluctuations in the voltage and prevent catastrophic failure of Zener diodes.

The BZX384B20-HE3-18 diodes are designed to provide a wide range of applications where reliable protection against overvoltage is required. The device provides a low impedance current path and it is designed to react quickly and precisely to overvoltage conditions. Additionally, the device can be used with a current limiting resistor to provide accurate control of the voltage output. The device is also well suited for radio frequency interference filtration, temperature stability, and protection of power supplies from high voltage transients.

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