CD746A

Single Zener Diodes Overview

The CD746A is a single Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. It features a nominal Zener voltage of 3.3 V with a tolerance of ±5%. The component supports a maximum power dissipation of 500 mW and operates within a temperature range of -65°C to +175°C. It utilizes a DO-213AB (SOD-80) surface-mount package. Key electrical characteristics include a maximum reverse leakage current of 5 µA, a Zener impedance of 28 Ohms at a test current of 20 mA, and a forward voltage of 1.1 V.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation with a nominal breakdown voltage of 3.3 V
• Capable of handling up to 500 mW of power dissipation in a compact surface-mount form factor
• Operates reliably across an extended industrial temperature range from -65°C to +175°C
• Features low reverse leakage current for efficient performance in sensitive circuits

Single Zener Diodes Applications

• Voltage reference circuits requiring precise 3.3 V levels
• Over-voltage protection stages in electronic systems
• Clamping applications in signal processing paths
• Power supply regulation modules

Single Zener Diodes Procurement Notes

Verify the specific manufacturer source, as the CDLL746A designation appears in official databases for Microchip and other entities like CDI-DIODE or Cobham. Ensure the datasheet matches the required DO-213AB package and hermetic sealing specifications if applicable. Confirm RoHS compliance status directly with the supplier, as historical data indicates variations. Cross-reference the part number suffixes to ensure functional equivalence before procurement.

Single Zener Diodes Selection Notes

Select this component when a robust, high-temperature Zener diode is required for 3.3 V regulation. The DO-213AB package suits space-constrained surface-mount designs. Consider the 5% voltage tolerance and 28 Ohm impedance for precision requirements. Evaluate the 500 mW power rating against circuit load conditions. Compare against similar MELF packages if leadless hermetic sealing is mandatory for the application environment.

Single Zener Diodes Part Context

This device belongs to the family of single Zener diodes offered by Microchip Technology. It serves as a fundamental passive component for maintaining steady voltage levels in diverse electronic assemblies. The DO-213AB package is a standard small-outline die-leadless configuration, facilitating automated assembly processes while providing reliable thermal and electrical connections for critical regulation tasks.

Single Zener Diodes Replacement Considerations

Publicly confirmed substitute part numbers include CDLL746A and CDLL746AE3. These variants share identical electrical specifications and pin configurations. Verify package compatibility and manufacturer-specific testing standards when substituting.