CDLL4904A/TR

Single Zener Diodes Overview

The CDLL4904A/TR is a temperature-compensated Zener diode manufactured by Microchip Technology, designed for surface-mount applications in the DO-213AA-2 package. It features a nominal Zener voltage of 12.8 V with a tight tolerance of ±5%. The device supports a maximum power dissipation of 500 mW and operates within an extended temperature range from -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 15 µA, a Zener impedance of 200 Ohms at a test current of 1 mA, and a voltage temperature coefficient of 0.01 %/°C.

Single Zener Diodes Feature Summary

• Temperature compensated design ensures stable voltage regulation across wide thermal variations
• High-temperature operation capability suitable for demanding industrial environments
• Surface-mount construction optimized for automated PCB assembly processes

Single Zener Diodes Applications

• Precision voltage reference circuits requiring thermal stability
• Over-voltage protection in high-reliability electronic systems
• Voltage regulation in aerospace and military-grade equipment

Single Zener Diodes Procurement Notes

Verify component authenticity through authorized Microchip distributors or certified suppliers. Confirm RoHS compliance status as indicated in official documentation, noting potential regulatory restrictions. Validate package integrity and marking accuracy upon receipt. Ensure storage conditions maintain component reliability before soldering. Cross-reference datasheet revisions to confirm parameter consistency with design requirements.

Single Zener Diodes Selection Notes

Select this component when precise voltage referencing under varying thermal conditions is critical. The DO-213AA-2 package offers compact footprint advantages for space-constrained designs. Consider the 500 mW power rating for appropriate heat dissipation planning. Evaluate the 200 Ohm impedance against circuit sensitivity requirements. Verify compatibility with automated pick-and-place equipment due to surface-mount configuration.

Single Zener Diodes Part Context

This part belongs to Microchip's CDLL series of hermetically sealed glass-passivated Zener diodes. The 'A' suffix typically denotes temperature compensation, while '/TR' indicates tape-and-reel packaging for high-volume manufacturing. These devices are engineered for high-reliability applications where standard plastic packages may not suffice.

Single Zener Diodes Replacement Considerations

CDLL4904A is the non-tape-and-reel equivalent variant. Verify package dimensions and pinout compatibility before substitution. Confirm that alternative components meet the same temperature coefficient and leakage current specifications.