1N5231B/TR

Single Zener Diodes Overview

The Microchip Technology 1N5231B/TR is a 0.5 W glass axial-lead Zener diode in the DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 5.1 V with a ±5% tolerance, indicated by the 'B' suffix. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 50 µA at 2 V. Electrical characteristics include a test current of 20 mA, a maximum Zener impedance of 17 Ω at 0.25 mA, and a forward voltage of 1.5 V at 200 mA. The 'TR' suffix denotes tape and reel packaging compliant with EIA-296 standards.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features hermetically sealed glass axial-lead construction for durability
• Inherently radiation hard per MicroNote 050 specifications
• Minimal capacitance characteristics suitable for high-frequency applications

Single Zener Diodes Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in electronic systems
• General-purpose voltage regulation tasks

Single Zener Diodes Procurement Notes

Verify that the ordering suffix 'TR' corresponds to the required tape and reel packaging format rather than bulk supply. Confirm the 'B' suffix indicates the specific ±5% voltage tolerance required for the design. Ensure the component meets the necessary environmental screening levels if the application demands military-grade reliability standards beyond standard commercial specifications.

Single Zener Diodes Selection Notes

Select this component when a 5.1 V regulation point is needed within a 0.5 W power dissipation limit. The DO-35 package is appropriate for through-hole mounting configurations. Consider the ±5% tolerance and 17 Ω impedance parameters to ensure compatibility with circuit sensitivity requirements. Verify thermal derating curves are respected for high-temperature environments exceeding 50°C.

Single Zener Diodes Part Context

This part belongs to the 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators manufactured by Microsemi (now Microchip Technology). The series offers a wide selection of voltages from 2.4 V to 200 V. The 1N5231B specifically targets the 5.1 V segment of this lineup, utilizing standard JEDEC registration for interchangeability with industry-standard equivalents.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF package. RoHS compliant versions can be identified by adding the 'e3' suffix to the base part number.