1N5229B

Single Zener Diodes Overview

The Fairchild Semiconductor 1N5229B is a single silicon unidirectional Zener diode with a nominal voltage of 4.3 V and a tolerance of ±5%. It features a maximum power dissipation of 500 mW and operates within a temperature range of -65°C to +200°C. The device utilizes a DO-35 axial through-hole package, providing an isolated case connection for reliable performance in standard electronic circuits.

Single Zener Diodes Feature Summary

• Hermetically sealed glass construction for environmental protection
• Wide operating temperature range suitable for harsh conditions
• Single configuration for precise voltage regulation

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection
• Clamping applications

Single Zener Diodes Procurement Notes

Verify the specific manufacturer source, as the 1N5229B designation is widely produced by multiple vendors including Microchip and others. Confirm that the received component matches the required DO-35 package and 4.3V specification. Ensure compliance with any project-specific material restrictions or lead-free requirements before integration.

Single Zener Diodes Selection Notes

Select this component when a robust, high-temperature rated Zener diode is required for through-hole assembly. The 500 mW rating supports moderate current levels, while the wide thermal range ensures stability in demanding environments compared to standard commercial-grade alternatives.

Single Zener Diodes Part Context

This part belongs to the legacy 1N52xx series of Zener diodes, originally standardized for military and industrial applications. The series is known for its reliability and consistent electrical characteristics across various manufacturers, maintaining relevance in designs requiring proven, long-life semiconductor components.

Single Zener Diodes Replacement Considerations

Equivalent parts include the Microsemi MQ1N5229BUR-1 and generic 1N5229B variants from other manufacturers. Verify pinout compatibility and ensure the replacement meets the same 4.3V nominal voltage and 500 mW power dissipation specifications.