1N4925

Overview

The Microchip Technology 1N4925 is a temperature-compensated Zener reference diode designed for precision voltage regulation applications. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5%. The device offers a power dissipation capability of 500 mW and operates within a junction temperature range of -65°C to +175°C. Packaged in the DO-35 (DO-204AH) axial leaded format, it provides low noise performance suitable for sensitive analog circuits.

Feature Summary

• Temperature compensated design ensures stable voltage reference across wide operating ranges
• Low noise characteristics maintain signal integrity in precision analog applications
• Robust thermal performance supports operation up to 175°C junction temperature

Applications

• Precision voltage reference sources
• Temperature compensated regulator circuits
• Low noise analog signal conditioning

Procurement Notes

Verify the specific manufacturer source, as historical production may involve Microsemi or Microchip Technology entities. Confirm package authenticity matches DO-35 specifications. Check datasheet revisions for any parameter updates. Ensure storage conditions align with semiconductor handling standards to prevent degradation before installation.

Selection Notes

Select this component when a stable 19.2 V reference is required with minimal temperature drift. The 500 mW rating suits low-power discrete designs. Verify that the ±5% tolerance meets circuit accuracy requirements. Consider the axial leaded package constraints for PCB layout compared to surface-mount alternatives.

Part Context

This part belongs to the standard Zener diode family, specifically optimized for temperature compensation. Unlike standard Zeners, it utilizes a combination of Zener and avalanche breakdown mechanisms to achieve a near-zero temperature coefficient around the 19.2 V nominal value, enhancing stability in varying thermal environments.

Replacement Considerations

Direct substitutes include other 19.2 V temperature-compensated Zener diodes in DO-35 packages from compatible manufacturers. Verify equivalent power ratings and tolerance levels. Cross-reference datasheets for matching temperature coefficients and noise specifications to ensure functional parity.