1N5229A

Single Zener Diodes Overview

The Microchip Technology 1N5229A 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 10% tolerance (suffix A). The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 50 µA at 5.0 V. Electrical characteristics include a test current of 20 mA, a maximum Zener impedance of 22 Ohms at IZT, and a temperature coefficient of ±0.055 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for durability
• Capable of regulating voltage across a broad operating current and temperature range
• Inherently radiation hard per MicroNote 050
• Minimal capacitance suitable for high-frequency applications

Single Zener Diodes Applications

• Voltage regulation circuits
• Reference voltage sources
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements against the datasheet to ensure correct tolerance levels. Confirm that the ordering part number matches the desired JEDEC registration status and screening options. Check for RoHS compliance if required by adding the e3 suffix. Ensure the procurement specifications align with the manufacturer's electrical limits and packaging formats.

Single Zener Diodes Selection Notes

Select this component when a 4.3 V reference with 10% tolerance is required in a through-hole axial package. Consider the thermal resistance and power derating curves for high-temperature environments. Evaluate the low leakage current and impedance characteristics for precision applications. Compare against tighter tolerance variants like the 1N5229B or surface mount equivalents if space constraints exist.

Single Zener Diodes Part Context

This component 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 in standard DO-35 packages. These devices are widely used in general-purpose electronics requiring stable voltage references.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available as MLL5229 in the DO-213AA MELF style package. Tighter tolerance versions include the 1N5229B (5%), 1N5229C (2%), and 1N5229D (1%). Military screening options are available with MQ, MX, MV, or MSP prefixes.