BZT55B3V9-GS18

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BZT55B3V9-GS18 diodes are Zener-type single diodes which are used to keep a steady current and protect some devices from potential power spikes that could otherwise damage them. The diode is constructed from a semiconductor material, P-type (protective) and N-type (negative), which are connected by a lightly doped PN junction region. Current flows through the PN junction without electrical resistance only when the voltage across the junction is sufficient to push the electrons across the junction.

The BZT55B3V9-GS18 Zener diode has a working voltage of 3.9V and a reverse voltage of 18V. Its maximum dissipation is 500 mW and it is designed to handle pulsed currents up to 1A and forward currents up to 30mA. The diode is commonly used in mains-powered devices such as computers, TVs, and cameras. It also provides protection for AC piping when connected in series to the circuit.

When the forward bias voltage across the diode is below the Zener breakdown voltage, the Zener diode acts like an insulator. This means that current cannot be passed through it and the connected device is protected from any unexpected spikes or surges. However, beyond the breakdown voltage, the diode\'s resistance decreases and a small amount of current is allowed to pass through the diode. This is called Zener breakdown. The Zener effect keeps the voltage across the junction constant, allowing the connected device to remain working at its rated level.

In addition to its use in mains-powered devices, BZT55B3V9-GS18 diodes are also useful in controlling voltage levels in data and communication lines. They are often used in radio projects and to protect sensitive components against power surges. The diode may also be used to create a temporary high-power source, such as in a power supply design. In this context, the Zener diode acts like a voltage regulator, allowing the voltage level to be constantly monitored and kept constant.

BZT55B3V9-GS18 Zener Single diodes are suitable for many applications where protection is needed from potential power surges or voltage drops. Their small size, low operating power, and simple application make them a popular choice for low power and portable applications. The diode is easy to use and should be taken into consideration when designing a wide range of electronics.

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