1N5231B

Single Zener Diodes Overview

The Microchip Technology 1N5231B is a 0.5 W glass axial-lead Zener diode in the DO-35 package. It provides a nominal Zener voltage of 5.1 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 5 µA at 4.7 V. Electrical characteristics include a test current of 20 mA, a maximum Zener impedance of 17 Ω, and a voltage temperature coefficient of ±0.030 %/°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole integration
• Inherently radiation hard per MicroNote 050 specifications
• Non-sensitive to electrostatic discharge (ESD) as verified by MIL-STD-750 Method 1020

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 specific part number matches the required JEDEC registration and tolerance suffix. Confirm compliance with RoHS requirements if applicable, noting that devices may require an 'e3' suffix for lead-free status. Ensure the ordering prefix aligns with any necessary military screening levels such as JAN or JANS. Cross-reference datasheet electrical limits against system design constraints before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 5.1 V breakdown voltage with ±5% tolerance is required. The DO-35 glass package suits applications needing robust thermal performance up to 175°C. Consider the low capacitance characteristic for high-frequency signal integrity. Evaluate the power derating curve to ensure adequate heat dissipation under steady-state conditions.

Single Zener Diodes Part Context

This device belongs to the 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators. The series offers a wide selection of voltages from 2.4 V to 200 V. Variants are available with tighter tolerances identified by different suffix letters. Military screening options exist via specific prefixes added to the base part number.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF style package. Glass body axial-leaded DO-7 equivalents are also offered as alternatives.