CDLL5254

Single Zener Diodes Overview

The CDLL5254 is a single Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. It features a nominal Zener voltage of 27 V with a tolerance of ±20%. The device operates in the DO-213AA (LL34) surface-mount package, measuring 3.7 mm in length and 1.7 mm in diameter. Key electrical parameters include a maximum reverse leakage current of 2 µA and a Zener impedance of 5 Ohms at a test current of 20 mA. It supports a forward current of 200 mA and maintains an operating temperature range from -65 °C to +175 °C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation using a single Zener junction structure.
• Utilizes hermetically sealed glass LL34 MELF packaging for environmental protection.
• Capable of handling significant forward current alongside reverse breakdown regulation.

Single Zener Diodes Applications

• Voltage reference circuits requiring stable DC levels.
• Overvoltage protection stages in electronic systems.
• Clamping applications for transient suppression.

Single Zener Diodes Procurement Notes

Verify the specific suffix (e.g., /TR for tape and reel or bulk packaging) when ordering, as it affects shipping format but not electrical function. Confirm RoHS compliance status directly with the manufacturer, as indicated data may vary by production batch. Ensure the DO-213AA footprint matches your PCB design constraints before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 27 V regulation point is required in a compact surface-mount form factor. The wide operating temperature range suits harsh environments. Consider the ±20% voltage tolerance; if tighter precision is needed, a different series must be chosen. Verify that the 500 mW power dissipation rating aligns with the thermal management capabilities of the target application circuit.

Single Zener Diodes Part Context

This part belongs to the CDLL52xx series of compensated Zener diodes from Microchip Technology. These devices are characterized by low noise and high stability compared to standard Zener diodes. The series utilizes glass passivation and hermetic sealing to ensure reliability in demanding industrial and commercial applications where long-term performance is critical.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers offering DO-213AA packaged 27 V Zener diodes. Ensure equivalent Zener impedance and leakage current specifications are met. Verify that any substitute device shares the same hermetic sealing requirements if used in sensitive environments.

Single Zener Diodes FAQ

What is the physical package type for the CDLL5254?

It uses the DO-213AA (also known as LL34) MELF glass package.

Does the CDLL5254 support bidirectional operation?

No, it is a unidirectional Zener diode designed for single-direction voltage regulation.