1N4899

Overview

The Microchip Technology 1N4899 is a temperature compensated Zener reference diode designed for low noise applications. It features a nominal Zener voltage of 12.8 V with a power dissipation rating of 400 mW. The device utilizes a DO-35 axial leaded package and operates within a junction temperature range of -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 15 µA and a test current of 50 µA, ensuring stable voltage regulation suitable for precision reference circuits.

Feature Summary

• Temperature compensated design for stable voltage reference performance across varying thermal conditions
• Low noise operation optimized for sensitive analog signal processing applications
• Single configuration in an axial through-hole package for standard mounting

Applications

• Precision voltage reference sources in measurement equipment
• Low noise regulator circuits requiring stable bias voltages
• Temperature compensated oscillator references

Procurement Notes

Verify the specific suffix (e.g., /TR) against the required packaging format, as bulk and tape-and-reel variants exist. Confirm RoHS compliance status directly with the manufacturer or authorized distributor, as historical data indicates non-compliant options may be available. Ensure the procurement channel provides valid traceability documentation for this component type.

Selection Notes

Select this component when a stable 12.8 V reference with low noise characteristics is required. The DO-35 package suits through-hole designs. Compare the 400 mW power rating against circuit dissipation needs. Verify that the 15 µA leakage current meets system isolation requirements. Consider the operating temperature range limits for the intended environment.

Part Context

This part belongs to the family of temperature compensated Zener diodes manufactured by Microchip Technology. These devices are engineered to minimize voltage drift over temperature changes, distinguishing them from standard Zener diodes. The 1N4899 specifically targets applications demanding high stability and low noise performance in a compact axial package.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.