1N5229B

Single Zener Diodes Overview

The Microchip Technology 1N5229B is a 0.5 W glass axial-lead Zener diode in the DO-35 package. It provides a nominal Zener voltage of 4.3 V with a ±5% tolerance (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 3.2 V. Electrical characteristics include a test current of 20 mA, a Zener impedance of 22 Ω at 2 mA, and a temperature coefficient of ±0.055 %/°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features minimal capacitance for high-frequency applications
• Inherently radiation hard per MicroNote 050
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection
• Clamping applications

Single Zener Diodes Procurement Notes

Verify the manufacturer origin, as the datasheet identifies Microsemi Scottsdale Division while the brand is listed as Microchip Technology. Confirm RoHS compliance status by checking for the 'e3' suffix on the specific part number ordered. Ensure the component matches the required 5% tolerance designation indicated by the 'B' suffix.

Single Zener Diodes Selection Notes

Select this component when a precise 4.3 V reference is needed in a through-hole axial configuration. The DO-35 glass package offers hermetic sealing suitable for harsh environments. Consider the low leakage current and tight voltage tolerance for precision analog designs requiring stable regulation under varying thermal conditions.

Single Zener Diodes Part Context

This device belongs to the 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators. The series covers a wide voltage selection from 2.4 V to 200 V. These components are JEDEC registered and utilize standard axial-lead mounting terminals for easy integration into printed circuit boards.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF package. For higher power requirements, consult other product lines designed for increased dissipation capabilities.