CDLL6346

The CDLL6346 diode is a single Zener diode designed for use in the electronic switching and protection applications. It is designed to help protect the circuits from high voltage transients that can be caused by power surges, EMI, RF, and other sources. The diode can also be used for transient suppression in other applications like AC power supplies. The diode is constructed from a Schottky diode element connected in series with a Zener diode. The advantage of this design is that it offers higher breakdown voltage than a standard Zener diode and allows for larger current handling capability than a single Zener diode, making it suitable for high-current applications.

General Description

The CDLL6346 is a single Zener diode designed for use in electronic switching and protection applications. It features an operating voltage of 6V, a power dissipation at 3.2W, a maximum breakdown voltage of 7.5V, and a maximum surge current of 25A. The 1.75 mm x 1.50 mm package provides excellent thermal performance when dissipating power. The diode also has a wide operating temperature range of -65°C to +150°C and is able to handle up to 5kV of transient voltage.

Features

• 6V operating voltage
• 3.2W power dissipation
• 7.5V maximum breakdown voltage
• 25A maximum surge current
• 1.75mm x 1.50mm package
• Wide operating temperature range of -65°C to +150°C
• Able to handle up to 5kV of transient voltage

Application Fields

The CDLL6346 diode is suitable for a range of applications and is commonly used for:

• EMI and RFI suppression
• Transient suppression in power supplies
• Power supply surge protection
• Overvoltage and undervoltage protection
• DC-DC converters

Working Principle

While the CDLL6346 is essentially a Zener diode, its operation relies on the combined properties of the Schottky diode element and the Zener diode. When a positive voltage is applied, the Schottky element turns on, allowing current to flow. At the same time, the reverse-biased Zener diode keeps the voltage across the diode below the breakdown voltage by clamping the voltage. This prevents the voltage from exceeding the breakdown voltage, allowing the Schottky element to remain on at lower voltages.

When the voltage exceeds the breakdown voltage, the diode enters a Zener breakdown or avalanche breakdown state. In this state, the diode generates a large current spike, which is the source of the clamping action. This is followed by a rapid decrease in current as the voltage is clamped to the desired level. The current in the diode then returns to its normal operating level.

Conclusion

The CDLL6346 diode is a single Zener diode used for electrical switching and protection applications. It is constructed from a Schottky diode element connected in series with a Zener diode to provide a higher breakdown voltage than a standard Zener diode and a higher current handling capability than a single Zener diode. It is suitable for a range of applications and is commonly used for EMI and RFI suppression, transient suppression in power supplies, power supply surge protection, overvoltage and undervoltage protection, and DC-DC converters.