1N5231B

Single Zener Diodes Overview

The Fairchild Semiconductor 1N5231B is a single silicon unidirectional voltage regulator diode with a nominal Zener voltage of 5.1 V and a maximum power dissipation of 500 mW. It features a 5% voltage tolerance, a maximum reverse leakage current of 5 µA at 2 V, and a Zener impedance of 17 Ohms. Designed for through-hole mounting in DO-35 (DO-204AH) axial packages, it operates within a junction temperature range of -65°C to +200°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation using a single silicon Zener junction.
• Supports high-temperature operation up to 200°C junction temperature.
• Utilizes an axial glass-encapsulated package for through-hole circuit integration.

Single Zener Diodes Applications

• General-purpose voltage reference circuits
• Overvoltage protection stages
• Biasing networks in analog electronics

Single Zener Diodes Procurement Notes

Verify the specific manufacturer source, as the 1N5231B designation is utilized by multiple vendors including Fairchild, onsemi, and Microchip. Confirm that the received component matches the required DO-35 package dimensions and electrical tolerances specified in the official datasheet before implementation.

Single Zener Diodes Selection Notes

Select this component when a standard 5.1 V reference is required in a through-hole configuration. The 500 mW power rating supports moderate current applications, while the wide operating temperature range ensures reliability in demanding thermal environments compared to lower-rated alternatives.

Single Zener Diodes Part Context

This device belongs to the JEDEC-standardized 1N523x series of Zener diodes. The 'B' suffix typically denotes a 5% voltage tolerance band. As a legacy part number, it remains widely used in industrial and consumer electronics designs requiring robust, low-cost voltage regulation components.

Single Zener Diodes Replacement Considerations

Equivalent parts include the onsemi 1N5231B and Microchip 1N5231B. Verify pinout compatibility and package dimensions (DO-35) when substituting across different manufacturers to ensure physical fitment.