1N4099UR

Single Zener Diodes Overview

The Microchip Technology 1N4099UR is a Zener voltage regulator diode housed in the DO-213AA surface mount package. It provides a nominal breakdown voltage of 6.8V with a standard tolerance of 5%. The device is rated for a maximum power dissipation of 500 mW and features an internal metallurgical bond construction, which enhances mechanical stability and reliability under thermal stress. It operates within a junction temperature range of -65°C to +175°C.

Single Zener Diodes Feature Summary

• Internal metallurgical bond construction for enhanced structural integrity
• Surface mount glass DO-213AA package design
• High operating junction temperature capability up to 175°C

Single Zener Diodes Applications

• Voltage regulation in high-reliability electronic circuits
• Reference voltage sources in precision measurement systems
• Over-voltage protection in sensitive semiconductor interfaces

Single Zener Diodes Procurement Notes

Verify the specific suffix (e.g., UR vs. UR-1) during procurement, as it indicates the presence or absence of an internal metallurgical bond. Confirm that the required qualification level matches the application needs, as military-grade variants may carry different suffixes. Ensure the ordering documentation explicitly states the tolerance class and power rating to avoid substitution errors with non-bonded commercial equivalents.

Single Zener Diodes Selection Notes

Select this component when a robust surface mount Zener diode is required for applications involving significant thermal cycling. The metallurgical bond option is critical for environments where wire-bond failure risks are unacceptable. Compare the 500 mW power rating against circuit load requirements to ensure adequate thermal headroom. Verify compatibility with automated assembly processes given the DO-213AA footprint.

Single Zener Diodes Part Context

This part belongs to the 1N4099 series of Zener diodes manufactured by Microchip Technology. It serves as the surface mount equivalent to traditional through-hole JEDEC registered parts. The series offers various voltage options from 1.8V to 100V, catering to diverse regulation needs while maintaining consistent package dimensions for board layout flexibility.

Single Zener Diodes Replacement Considerations

Direct substitutes include other 1N4099 series variants with matching voltage and tolerance. Non-metallurgically bonded versions may be used if mechanical shock resistance is not a primary constraint. Ensure any replacement maintains the DO-213AA footprint and 500 mW power dissipation rating.