CDLL4749C

Single Zener Diodes Overview

The CDLL4749C is a single Zener diode manufactured by Microchip Technology, designed for surface-mount applications in the DO-213AB (MELF) package. It provides a nominal Zener voltage of 24 V with a tight tolerance of ±2%. The device supports a power dissipation of 1 W and operates within a temperature range of -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 100 nA, a Zener impedance of 25 Ohms, and a test current of 10.5 mA. The forward voltage is specified at 1.2 V with a maximum forward current of 200 mA.

Single Zener Diodes Feature Summary

• Provides precise voltage regulation with a tight ±2% tolerance on the 24 V Zener voltage.
• Capable of handling high power dissipation up to 1 W in a compact MELF package.
• Engineered for extended reliability with an operating temperature range extending to +175°C.

Single Zener Diodes Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection in sensitive electronic systems
• Clamping applications in signal processing paths

Single Zener Diodes Procurement Notes

Verify the specific suffix designation when ordering, as variants such as CDLL4749C/TR may differ in packaging format compared to the standard bulk or reel configurations. Confirm RoHS compliance status directly with the manufacturer, as some listings indicate non-compliance for certain revisions. Ensure the DO-213AB package dimensions match your PCB footprint requirements before finalizing procurement decisions.

Single Zener Diodes Selection Notes

Select this component when a 24 V regulation point is required with higher precision than standard 5% tolerance devices allow. The 1 W power rating makes it suitable for applications with moderate current demands where thermal management is feasible. Consider the MELF form factor for automated assembly processes that benefit from its robust leadless design compared to traditional axial leads.

Single Zener Diodes Part Context

This part belongs to the CDLL47xx series of Zener diodes from Microchip Technology, which utilizes the DO-213AB MELF package. This series is distinct from other Microchip diode lines by its focus on high-reliability surface-mount solutions. The CDLL4749C specifically targets the 24 V segment of this portfolio, offering tighter tolerances than the 'B' or 'C' suffix variants found in similar product families.

Single Zener Diodes Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Engineers should consult official Microchip cross-reference tools or datasheets for equivalent components from other manufacturers if supply constraints arise.