1N4929

Overview

The Microchip Technology 1N4929 is a temperature-compensated Zener reference diode with a nominal voltage of 19.2 V and ±5% tolerance. It features low noise characteristics and utilizes metallurgically bonded double plug construction for stability. The device is designed for through-hole mounting in DO-35 (DO-204AH) packages, dissipating up to 500 mW. It operates within a temperature range of -55°C to +100°C, ensuring reliable performance in precision voltage regulation applications requiring minimal drift.

Feature Summary

• Temperature compensated design for stable voltage reference
• Low noise operation for precision circuits
• Metallurgically bonded double plug construction

Applications

• Precision voltage reference sources
• Temperature compensated regulator circuits
• Low noise power supply filtering

Procurement Notes

Verify the specific manufacturer datasheet for the 1N4929 to confirm exact electrical tolerances and thermal characteristics. Ensure the selected component matches the required DO-35 package style and through-hole mounting specifications. Cross-reference official documentation to validate the 19.2 V nominal voltage and 500 mW power dissipation ratings before integration into final designs.

Selection Notes

Select this component when a stable, low-noise voltage reference is required over a wide temperature range. The 19.2 V nominal value suits specific biasing needs. Verify that the through-hole DO-35 package fits the PCB layout constraints. Confirm that the ±5% tolerance meets the circuit's accuracy requirements without needing external trimming.

Part Context

This part belongs to Microchip’s single Zener diode lineup, specifically engineered as a temperature-compensated reference. Unlike standard Zener diodes, it offers improved stability against thermal variations. The 1N4929 is distinct from general-purpose switching diodes like the 1N4449 or higher-power regulators like the 1N6489, focusing on precision rather than high current handling.

Replacement Considerations

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