BZX84B3V9-E3-18

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The BZX84B3V9-E3-18 is a single Zener diode, characterized by a heavily doped PN junction, that enables reverse current at a specific reverse voltage, or breakdown voltage, and thus regulates voltage levels. These diodes have various applications, including power supplies, voltage multipliers, high-voltage applications, overvoltage protection, point-of-load regulation, current limitation, polarity protection, and voltage regulation.

The BZX84B3V9-E3-18 is designed according to the general theory of Zener diodes, which states that the reverse current increases exponentially with an applied reverse voltage, up to the point where breakdown occurs. The Zener voltage, or breakdown voltage, is the point at which the diode\'s reverse current increases rapidly. As the reverse voltage continues to increase, the reverse current remains relatively stable, as the diode enters its breakdown region.

The BZX84B3V9-E3-18 is a low-power Zener diode, primarily used in regulation and protection applications. It can be used to regulate a fixed voltage and limit the current running through an electronic circuit. When the diode is in forward bias, it acts as a regular diode, allowing current to flow through it without any electrical resistance. Once the Zener voltage has been breached, the diode blocks current flow and can regulate the amount of current flowing in the circuit. This can be beneficial in the event of a power surge or sudden increase in voltage, as it helps protect the rest of the circuit from damage.

The BZX84B3V9-E3-18 is available in the TO-92 package and has a maximum power dissipation of 500 milliwatts. It has a maximum operating temperature of +150°C and a maximum reverse leakage current of 10 µA at 10V. It has a nominal Zener voltage of 18V, with a maximum breakdown voltage of 21V. It is designed for use in both AC and DC circuits.

Due to its low power dissipation, the BZX84B3V9-E3-18 is well-suited for use in low-power voltage regulation and protection circuits. It can be used to protect against overvoltage, as well as provide a stable output voltage in power supplies and voltage regulators. It can also be used to protect against polarity reversal and current limiting. Due to its compact size and low cost, it is a popular choice for hobbyists and hobby circuits.

In summary, the BZX84B3V9-E3-18 is a single Zener diode designed for low-power applications such as voltage regulation, overvoltage protection, polarity protection, and current limitation. It is available in the TO-92 package and has a nominal Zener voltage of 18V, with a maximum breakdown voltage of 21V. It has a maximum operating temperature of +150°C and a maximum reverse leakage current of 10 µA at 10V. Its low power dissipation makes it an ideal choice for low-power projects and circuits.

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