1N4929A

Overview

The Microchip Technology 1N4929A is a single Zener diode designed for precision voltage reference applications. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 500 mW and operates in a through-hole DO-204AH (DO-35) package. Key electrical characteristics include a low noise profile and temperature compensation, ensuring stable performance across varying thermal conditions. The maximum impedance is specified at 36 Ohms.

Feature Summary

• Temperature compensated design for stable voltage reference
• Low noise operation suitable for sensitive circuits
• Metallurgically bonded construction for reliability

Applications

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

Procurement Notes

Verify the specific manufacturer source, as the 1N4929A designation has been produced by multiple entities including Microchip, Compensated Devices Incorporated, and Digitron Semiconductors. Ensure the datasheet matches the required specifications for impedance and tolerance before procurement to avoid compatibility issues with existing circuit designs.

Selection Notes

Select this component when a stable, low-noise voltage reference is required in a standard axial leaded package. The 19.2 V nominal voltage and ±5% tolerance make it suitable for general-purpose regulation tasks where high precision is not critical but stability over temperature is necessary. Consider the 500 mW power rating for thermal management in the final assembly.

Part Context

This component belongs to the family of single Zener diodes manufactured by Microchip Technology. It is part of a broader range of temperature-compensated reference diodes designed to provide reliable voltage regulation in various electronic systems. The DO-35 package is a standard form factor for through-hole mounting in legacy and industrial electronics.

Replacement Considerations

Equivalent parts may be available from other manufacturers such as Digitron or Compensated Devices Incorporated, provided they meet the 19.2 V nominal voltage, ±5% tolerance, and 500 mW power dissipation requirements. Verify pinout and package dimensions for mechanical compatibility.