AZ23C12-TP

Diodes - Zener - Arrays - AZ23C12-TP Application Field and Working Principle

AZ23C12-TP is a type of high voltage diodes commonly used in electronic circuitry as a protective device. It functions as a bi-directional, self-protected zener diode array, protecting electronic circuits from overvoltage and ESD (electrostatic discharge) transients. With its small size, excellent temperature stability, and high over-voltage protection capability, AZ23C12-TP is ideal for applications requiring enhanced protection from external voltage spikes and ESD transients.

Description

The AZ23C12-TP series is all-surface mount, surfacemountable miniature diodes which offer enhanced transient- and ESD-protection capability with a rated voltage up to 12V combined with a low capacitance as well as high bonding quality and high surge-handling capability. It is designed to protect sensitive electronic devices from electrostatic and transients. The AZ23C12-TP diodes provide an electrostatic discharge protection capability of up to 8KV contact discharge and 15KV air-gap discharge.

It contains two zener diodes connected in series in an SOT-563 package, providing a bidirectional protection capability. The maximum rated power of each diode is 5W, and the total maximum power of the two connected diodes is 5W. It is designed to work in the temperature range of -55 °C to +125°C.

Applications

The AZ23C12-TP series diodes are mainly used in applications where high electrostatic discharge (ESD), transients, and/or overvoltage protection are required. In general, they can be used in any electronic circuits requiring a high voltage protection device. The list of common applications includes:

• Communication systems
• Computers & peripherals
• Consumer electronics & automotive
• High voltage protection
• Industrial & commercial power systems
• Test & measurement equipment
• USB ports & storage media readers

Working Principle

AZ23C12-TP diodes have a self-protection mechanism activated when the voltage across the diode exceeds its breakdown voltage. When this happens, the diode begins to conduct, allowing an excess of current to flow through it in order to reduce the voltage. This significantly reduces the risk of damage to sensitive electronic components from voltage spikes and ESD transients.

The two zener diodes connected in series are designed to work in combination in order to provide enhanced protection. The zener diodes operate in avalanche breakdown mode. When the voltage across the diode exceeds its breakdown voltage (typically 12V in this case), the diode begins to conduct and the excess current is diverted away from the sensitive component, thus providing overvoltage protection. The two diodes also act as ESD protection devices in that they can absorb high surge energies without suffering any damage.

Variants

The AZ23C12-TP series is available in different variants. The available options include:

• Silicon-based (SZ) Surface Mount Diodes
• Composite Zener Diodes (CZ)
• Silicon Carbide (SiC) Diodes
• Light Emitting Diodes (LEDs)
• Transistors and integrated circuits

The various versions of this diode enable the user to select and customize the specific version according to one’s requirement and budget.

Conclusion

AZ23C12-TP is a versatile, high-performance zener diode array which offers enhanced protection against transients and ESD events. It offers a small size, high reliability, and excellent temperature stability and is suitable for a wide range of applications such as communication, automotive, industrial, and consumer electronics.