SMPZ3934B-E3/84A

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A Zener diode is an electronic component which is typically found as part of a device’s circuit board. In the simplest terms, a Zener diode is a special type of diode which allows current to flow in the reverse direction, providing a unique characteristic of creating a fixed DC voltage across its terminals regardless of the current provided to it. One of the popular types of such diodes is the SMPZ3934B-E3/84A.

In terms of application, the SMPZ3934B-E3/84A Zener diode is beneficial in providing regulated or stabilized voltages in a variety of commercial and consumer electronics. It is designed for operation in the reverse breakdown region and can be used to protect sensitive semiconductor components from overvoltage spikes, or to provide isolation or filtering of AC or DC signals. In addition, the device can be used as a voltage regulator for a variety of computer and telecommunications applications.

The working principle and behaviour of a Zener diode, including the SMPZ3934B-E3/84A, is based on the flow of current in a reverse direction. This forms a breakdown voltage, which is a measurable voltage at which a Zener diode allows current to flow in the reverse direction. This voltage depends on the amount of voltage and current passing through the diode. When sufficient voltage is applied to a Zener diode, it allows current to flow in the reverse direction, which is known as a "breakdown". This causes the voltage across the diode to become constant, despite the level of current passing through it.

The SMPZ3934B-E3/84A Zener diode has a relatively low specific Zener impedance and low reverse leakage current of approximately 1.0mA. The device comes in a 1-lead DO-41 (SOD-323 package) of size 3.2mm x 1.3mm and features a low profile for increased reliability and reduced size of the application. The maximum operating temperature for this Zener diode is 150°C and it offers a maximum Zener voltage of 4.7V.

In summary, the SMPZ3934B-E3/84A Zener diode is a widely used device which is highly reliable and cost-effective. It can be used in reverse breakdown regions to protect sensitive semiconductor components and to create a fixed DC voltage across its terminals. The device is available in an SOD-323 package of size 3.2mm x 1.3mm and offers a maximum operating temperature up to 150°C and a maximum Zener voltage of 4.7V.

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