1N2980A

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A 1N2980A is a single, Zener diode that is widely used in the electronics industry. It typically has a nominal voltage of 3.3 Volts and a power dissipation of 150 mW. It is a small diode with a size of 2.5 mm x 4.3 mm.

The application field for this diode is in the field of circuit protection, low voltage regulated power supplies, voltage reference circuits and in circuits that require a stable reference voltage. Moreover, it is often used for protection of sensitive electronic components.

In terms of operation, the 1N2980A diode provides a regulated output voltage that is reverse biased. In order to obtain the desired output voltage, a certain amount of current is passed through the diode. The amount of current passing through the diode, known as the reverse current, is determined by the voltage at which the diode breaks down, known as the breakdown voltage. The breakdown voltage of the 1N2980A is 3.3V.

The device consists of two regions, the anode and the cathode, which are separated by a PN junction. When a forward current is applied to the diode, the electric field formed in the PN junction forces the majority carriers to cross the junction, allowing charge conduction to take place. In the reverse bias direction, the junction is no longer in equilibrium and it forms an electric field which can cause breakdown of the PN junction if the voltage is large enough.

In the reverse bias case, the 1N2980A conducts by Zener breakdown, allowing a stable current to flow when the reverse voltage across the diode exceeds its breakdown voltage. Due to this property, it is possible to maintain a stable voltage reference in a circuit by connecting the diode in reverse bias. This is referred to as Zener voltage regulation or Zener diode voltage reference.

Another application of the 1N2980A is in the field of ESD protection. This diode is used to protect sensitive electronic components from electrostatic discharge (ESD) by providing an absorbent path to ground. In this configuration, the diode is connected across the supply voltage and the device being protected in order to route any ESD events away from the device.

In summary, the 1N2980A is a widely used single, Zener diode. It has a breakdown voltage of 3.3V and a power dissipation rating of 150mW. It is used in the field of circuit protection, low voltage regulated power supplies, voltage reference circuits, ESD protection and more.

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