DDZ20CQ-7

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Diodes are an integral component of most practical electrical circuits and systems, and the Zener diode is one of the most essential types of diodes. The DDZ20CQ-7 is a single Zener diode with a reverse breakdown voltage between 20 to 37 volts. It also has a maximum power dissipation of 200mW and a maximum clamping voltage of 41v.

Diodes are two-terminal, semi-conductor electronic components that allow current to flow in one direction only. Zener diodes are diodes in which the junction is designed to deliberately breakdown at a specified reverse voltage. This breakdown happens when the reverse voltage applied across the diode exceeds a certain voltage level, called the breakdown voltage or Zener voltage. The DDZ20CQ-7 is a so-called "highly doped" Zener diode, which means that the doping profile in the semiconductor material is heavily engineered, resulting in a much sharper knee in the Zener voltage characteristic.

The main application field of the DDZ20CQ-7 is transient voltage protection in various commercial and industrial electronics, such as industrial process controllers, computers, and power supplies. It is also often used as voltage-limiterenforcement and stabilization circuits, as well as current-limiting devices. It can be used to provide an electrical path for signal paths which otherwise would be blocked by a diode.

The working principle of the DDZ20CQ-7 is that when the reverse voltage applied across it exceeds the breakdown voltage, the junction will start to conduct to limit the current. This can be thought of as the reverse diode\'s “on” state since current will now be able to flow through the diode in both directions. Thus Zener diodes are ideal for voltage regulation, since the voltage across them is relatively unaffected by the current through them, provided that the current is low enough to not interfere with the breakdown voltage.

The Zener effect also acts as an over-voltage protection device by allowing a small current to flow in reverse, through the diode, whenever the voltage exceeds a certain level. The current diverts to the diode and is then dissipated as heat, which helps to protect the circuit from damage. This is what makes the DDZ20CQ-7 an important component in power supplies or switch-mode power supplies.

The DDZ20CQ-7 is one of the most commonly used Zener diodes in the semiconductor industry. It is reliable, cost-effective and relatively easy to use, making it a popular choice for applications requiring robust voltage-limiting features. This type of diode is also advantageous in that it can be used in applications with high transient voltage, making it an ideal choice for many of today’s modern electronics.

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